Open Access. Powered by Scholars. Published by Universities.®

Social and Behavioral Sciences Commons

Open Access. Powered by Scholars. Published by Universities.®

PDF

Time Factors

Discipline
Institution
Publication Year
Publication

Articles 1 - 30 of 33

Full-Text Articles in Social and Behavioral Sciences

Travel-Time Disparities In Access To Proton Beam Therapy For Cancer Treatment, Todd Burus, Alexander Vanhelene, Michael Rooney, Krystle Lang Kuhs, W. Jay Christian, Christopher Mcnair, Sanjay Mishra, Arnold Paulino, Grace Smith, Steven Frank, Jeremy Warner May 2024

Travel-Time Disparities In Access To Proton Beam Therapy For Cancer Treatment, Todd Burus, Alexander Vanhelene, Michael Rooney, Krystle Lang Kuhs, W. Jay Christian, Christopher Mcnair, Sanjay Mishra, Arnold Paulino, Grace Smith, Steven Frank, Jeremy Warner

Department of Pharmacology, Physiology, and Cancer Biology Faculty Papers

IMPORTANCE: Proton beam therapy is an emerging radiotherapy treatment for patients with cancer that may produce similar outcomes as traditional photon-based therapy for many cancers while delivering lower amounts of toxic radiation to surrounding tissue. Geographic proximity to a proton facility is a critical component of ensuring equitable access both for indicated diagnoses and ongoing clinical trials.

OBJECTIVE: To characterize the distribution of proton facilities in the US, quantify drive-time access for the population, and investigate the likelihood of long commutes for certain population subgroups.

DESIGN, SETTING, AND PARTICIPANTS: This population-based cross-sectional study analyzed travel times to proton facilities in …


The Earth Biogenome Project 2020: Starting The Clock., Harris A Lewin, Stephen Richards, Erez Lieberman Aiden, Miguel L Allende, John M Archibald, Miklós Bálint, Katharine B Barker, Bridget Baumgartner, Katherine Belov, Giorgio Bertorelle, Mark L Blaxter, Jing Cai, Nicolette D Caperello, Keith Carlson, Juan Carlos Castilla-Rubio, Shu-Miaw Chaw, Lei Chen, Anna K Childers, Jonathan A Coddington, Dalia A Conde, Montserrat Corominas, Keith A. Crandall, Andrew J Crawford, Federica Dipalma, Richard Durbin, Thankgod E Ebenezer, Scott V Edwards, Olivier Fedrigo, Paul Flicek, Giulio Formenti, Richard A Gibbs, M Thomas P Gilbert, Melissa M. Goldstein, Jennifer Marshall Graves, Henry T Greely, Igor V Grigoriev, Kevin J Hackett, Neil Hall, David Haussler, Kristofer M Helgen, Carolyn J Hogg, Sachiko Isobe, Kjetill Sigurd Jakobsen, Axel Janke, Erich D Jarvis, Warren E Johnson, Steven J M Jones, Elinor K Karlsson, Paul J Kersey, Jin-Hyoung Kim, W John Kress, Shigehiro Kuraku, Mara K N Lawniczak, James H Leebens-Mack, Xueyan Li, Kerstin Lindblad-Toh, Xin Liu, Jose V Lopez, Tomas Marques-Bonet, Sophie Mazard, Jonna A K Mazet, Camila J Mazzoni, Eugene W Myers, Rachel J O'Neill, Sadye Paez, Hyun Park, Gene E Robinson, Cristina Roquet, Oliver A Ryder, Jamal S M Sabir, H Bradley Shaffer, Timothy M Shank, Jacob S Sherkow, Pamela S Soltis, Boping Tang, Leho Tedersoo, Marcela Uliano-Silva, Kun Wang, Xiaofeng Wei, Regina Wetzer, Julia L Wilson, Xun Xu, Huanming Yang, Anne D Yoder, Guojie Zhang Jan 2022

The Earth Biogenome Project 2020: Starting The Clock., Harris A Lewin, Stephen Richards, Erez Lieberman Aiden, Miguel L Allende, John M Archibald, Miklós Bálint, Katharine B Barker, Bridget Baumgartner, Katherine Belov, Giorgio Bertorelle, Mark L Blaxter, Jing Cai, Nicolette D Caperello, Keith Carlson, Juan Carlos Castilla-Rubio, Shu-Miaw Chaw, Lei Chen, Anna K Childers, Jonathan A Coddington, Dalia A Conde, Montserrat Corominas, Keith A. Crandall, Andrew J Crawford, Federica Dipalma, Richard Durbin, Thankgod E Ebenezer, Scott V Edwards, Olivier Fedrigo, Paul Flicek, Giulio Formenti, Richard A Gibbs, M Thomas P Gilbert, Melissa M. Goldstein, Jennifer Marshall Graves, Henry T Greely, Igor V Grigoriev, Kevin J Hackett, Neil Hall, David Haussler, Kristofer M Helgen, Carolyn J Hogg, Sachiko Isobe, Kjetill Sigurd Jakobsen, Axel Janke, Erich D Jarvis, Warren E Johnson, Steven J M Jones, Elinor K Karlsson, Paul J Kersey, Jin-Hyoung Kim, W John Kress, Shigehiro Kuraku, Mara K N Lawniczak, James H Leebens-Mack, Xueyan Li, Kerstin Lindblad-Toh, Xin Liu, Jose V Lopez, Tomas Marques-Bonet, Sophie Mazard, Jonna A K Mazet, Camila J Mazzoni, Eugene W Myers, Rachel J O'Neill, Sadye Paez, Hyun Park, Gene E Robinson, Cristina Roquet, Oliver A Ryder, Jamal S M Sabir, H Bradley Shaffer, Timothy M Shank, Jacob S Sherkow, Pamela S Soltis, Boping Tang, Leho Tedersoo, Marcela Uliano-Silva, Kun Wang, Xiaofeng Wei, Regina Wetzer, Julia L Wilson, Xun Xu, Huanming Yang, Anne D Yoder, Guojie Zhang

Health Policy and Management Faculty Publications

No abstract provided.


Cortical And Thalamic Connectivity To The Second Auditory Cortex Of The Cat Is Resilient To The Onset Of Deafness., Blake E Butler, Alexandra De La Rua, Taylor Ward-Able, Stephen G Lomber Mar 2018

Cortical And Thalamic Connectivity To The Second Auditory Cortex Of The Cat Is Resilient To The Onset Of Deafness., Blake E Butler, Alexandra De La Rua, Taylor Ward-Able, Stephen G Lomber

Brain and Mind Institute Researchers' Publications

It has been well established that following sensory loss, cortical areas that would normally be involved in perceiving stimuli in the absent modality are recruited to subserve the remaining senses. Despite this compensatory functional reorganization, there is little evidence to date for any substantial change in the patterns of anatomical connectivity between sensory cortices. However, while many auditory areas are contracted in the deaf, the second auditory cortex (A2) of the cat undergoes a volumetric expansion following hearing loss, suggesting this cortical area may demonstrate a region-specific pattern of structural reorganization. To address this hypothesis, and to complement existing literature …


Measuring Heightened Attention To Alcohol In A Naturalistic Setting: A Validation Study, Ramey G. Monem, Mark T. Fillmore Dec 2017

Measuring Heightened Attention To Alcohol In A Naturalistic Setting: A Validation Study, Ramey G. Monem, Mark T. Fillmore

Psychology Faculty Publications

Attentional bias to alcohol-related stimuli is believed to be an important contributor to the development and maintenance of drug abuse. There is a considerable body of research examining attentional bias, much of which has typically utilized image-display tasks as a means to assess the phenomenon. Little, however, is known about the nature of this bias in an individual’s natural environment. The current study sought to implement a novel approach to assessing attentional bias in vivo. Participants wore portable eye-tracking glasses that recorded video from their point of view and measured fixation time to objects they observed. They entered a room …


(Re)Grounding Grounded Theory: A Close Reading Of Theory In Four Schools, Tavis Apramian, Sayra Cristancho, Chris Watling, Lorelei Lingard Aug 2017

(Re)Grounding Grounded Theory: A Close Reading Of Theory In Four Schools, Tavis Apramian, Sayra Cristancho, Chris Watling, Lorelei Lingard

Health and Rehabilitation Sciences Publications

The debate over what counts as theory has dominated methodological conversations in grounded theory research for decades. Four of the schools of thought in that debate – Glaserian, Straussian, Charmazian, and Clarkeian – hold different assumptions about what theory is and how it is made. The first two schools understand theory as an abstraction that exactingly accounts for exceptions. The second two schools understand theory as a process of describing voices hidden from public view. While Glaserian and Straussian coding processes focus on coding exceptions, Charmazian and Clarkeian coding processes focus on building a story of the participants or social …


Faster Self-Paced Rate Of Drinking For Alcohol Mixed With Energy Drinks Versus Alcohol Alone, Cecile A. Marczinski, Mark T. Fillmore, Sarah F. Maloney, Amy L. Stamates Mar 2017

Faster Self-Paced Rate Of Drinking For Alcohol Mixed With Energy Drinks Versus Alcohol Alone, Cecile A. Marczinski, Mark T. Fillmore, Sarah F. Maloney, Amy L. Stamates

Psychology Faculty Publications

The consumption of alcohol mixed with energy drinks (AmED) has been associated with higher rates of binge drinking and impaired driving when compared with alcohol alone. However, it remains unclear why the risks of use of AmED are heightened compared with alcohol alone even when the doses of alcohol consumed are similar. Therefore, the purpose of this laboratory study was to investigate if the rate of self-paced beverage consumption was faster for a dose of AmED versus alcohol alone using a double-blind, within-subjects, placebo-controlled study design. Participants (n = 16) of equal gender who were social drinkers attended 4 separate …


Reliability And Validity Of The Hd-Pro-Triadtm, A Health-Related Quality Of Life Measure Designed To Assess The Symptom Triad Of Huntington's Disease., Nicholas R Boileau, Julie C Stout, Janes S Paulsen, David Cella, Michael K Mccormack, Martha A Nance, Samuel Frank, Jin-Shei Lai, Noelle E Carlozzi Jan 2017

Reliability And Validity Of The Hd-Pro-Triadtm, A Health-Related Quality Of Life Measure Designed To Assess The Symptom Triad Of Huntington's Disease., Nicholas R Boileau, Julie C Stout, Janes S Paulsen, David Cella, Michael K Mccormack, Martha A Nance, Samuel Frank, Jin-Shei Lai, Noelle E Carlozzi

Rowan-Virtua School of Osteopathic Medicine Faculty Scholarship

BACKGROUND: Huntington's disease (HD), is a neurodegenerative disorder that is associated with cognitive, behavioral, and motor impairments that diminish health related quality of life (HRQOL). The HD-PRO-TRIADTM is a quality of life measure that assesses health concerns specific to individuals with HD. Preliminary psychometric characterization was limited to a convenience sample of HD participants who completed measures at home so clinician-ratings were unavailable.

OBJECTIVES: The current study evaluates the reliability and validity of the HD-PRO-TRIADTM in a well-characterized sample of individuals with HD.

METHODS: Four-hundred and eighty-two individuals with HD (n = 192 prodromal, n = 193 early, and n …


Examining Multi-Session Brief Intervention For Substance Use In Primary Care: Research Methods Of A Randomized Controlled Trial., Jaclyn E Chambers, Adam C Brooks, Rachel Medvin, David S Metzger, Jennifer Lauby, Carolyn M Carpenedo, Kevin E Favor, Kimberly C Kirby Apr 2016

Examining Multi-Session Brief Intervention For Substance Use In Primary Care: Research Methods Of A Randomized Controlled Trial., Jaclyn E Chambers, Adam C Brooks, Rachel Medvin, David S Metzger, Jennifer Lauby, Carolyn M Carpenedo, Kevin E Favor, Kimberly C Kirby

Faculty Scholarship for the College of Science & Mathematics

BACKGROUND: Brief interventions such as Screening, a single session of Brief Intervention, and Referral to Treatment (SBIRT) have shown mixed effectiveness in primary care. However, there are indications that multi-session brief interventions may demonstrate more consistently positive outcomes, and perhaps a more intensive approach would be of benefit in addressing substance use in primary care. This study compared the effectiveness of SBIRT with a single BI session (BI/RT) to a multi-session brief-treatment intervention (BI/RT+) in primary care. We also developed easy-to-use, evidence-based materials to assist clinicians in delivering these interventions.

METHODS/DESIGN: This study was conducted in three Federally Qualified Healthcare …


Effects Of A Consistent Target Or Masker Voice On Target Speech Intelligibility In Two- And Three-Talker Mixtures., Fabienne Samson, Ingrid S Johnsrude Mar 2016

Effects Of A Consistent Target Or Masker Voice On Target Speech Intelligibility In Two- And Three-Talker Mixtures., Fabienne Samson, Ingrid S Johnsrude

Brain and Mind Institute Researchers' Publications

When the spatial location or identity of a sound is held constant, it is not masked as effectively by competing sounds. This suggests that experience with a particular voice over time might facilitate perceptual organization in multitalker environments. The current study examines whether listeners benefit from experience with a voice only when it is the target, or also when it is a masker, using diotic presentation and a closed-set task (coordinate response measure). A reliable interaction was observed such that, in two-talker mixtures, consistency of masker or target voice over 3-7 trials significantly benefited target recognition performance, whereas in three-talker …


Respiratory Sinus Arrhythmia Reactivity To A Sad Film Predicts Depression Symptom Improvement And Symptomatic Trajectory, Vanessa Panaite, Alexandra Cowden Hindash, Lauren M. Bylsma, Brent J. Small, Kristen Salomon, Johnathan Rottenberg Jan 2016

Respiratory Sinus Arrhythmia Reactivity To A Sad Film Predicts Depression Symptom Improvement And Symptomatic Trajectory, Vanessa Panaite, Alexandra Cowden Hindash, Lauren M. Bylsma, Brent J. Small, Kristen Salomon, Johnathan Rottenberg

Psychology Faculty Publications

Respiratory sinus arrhythmia (RSA) reactivity, an index of cardiac vagal tone, has been linked to self-regulation and the severity and course of depression (Rottenberg, 2007). Although initial data supports the proposition that RSA withdrawal during a sad film is a specific predictor of depression course (Fraguas, 2007; Rottenberg, 2005), the robustness and specificity of this finding are unclear. To provide a stronger test, RSA reactivity to three emotion films (happy, sad, fear) and to a more robust stressor, a speech task, were examined in currently depressed individuals (n = 37), who were assessed for their degree of symptomatic improvement over …


Preserved Haptic Shape Processing After Bilateral Loc Lesions., Jacqueline C Snow, Melvyn A Goodale, Jody C Culham Oct 2015

Preserved Haptic Shape Processing After Bilateral Loc Lesions., Jacqueline C Snow, Melvyn A Goodale, Jody C Culham

Brain and Mind Institute Researchers' Publications

UNLABELLED: The visual and haptic perceptual systems are understood to share a common neural representation of object shape. A region thought to be critical for recognizing visual and haptic shape information is the lateral occipital complex (LOC). We investigated whether LOC is essential for haptic shape recognition in humans by studying behavioral responses and brain activation for haptically explored objects in a patient (M.C.) with bilateral lesions of the occipitotemporal cortex, including LOC. Despite severe deficits in recognizing objects using vision, M.C. was able to accurately recognize objects via touch. M.C.'s psychophysical response profile to haptically explored shapes was also …


Prolonged In Vivo Retention Of A Cathepsin D Targeted Optical Contrast Agent In A Mouse Model Of Alzheimer's Disease., Jonatan A Snir, Mojmir Suchy, Keith St Lawrence, Robert H E Hudson, Stephen H Pasternak, Robert Bartha Jan 2015

Prolonged In Vivo Retention Of A Cathepsin D Targeted Optical Contrast Agent In A Mouse Model Of Alzheimer's Disease., Jonatan A Snir, Mojmir Suchy, Keith St Lawrence, Robert H E Hudson, Stephen H Pasternak, Robert Bartha

Brain and Mind Institute Researchers' Publications

BACKGROUND: Cathepsin D (CatD) is a lysosomal protease that is elevated early in Alzheimer's disease (AD). We have previously developed a Targeted contrast agent (CA) to detect CatD activity in vivo, consisting of a magnetic resonance imaging/fluorescent moiety linked to a cell penetrating peptide (CPP) by means of a CatD cleavage site and have demonstrated its uptake in the brain of an AD mouse model.

OBJECTIVE: The purpose of this study was to characterize the in vivo retention of a near infra-red fluorescent dye labeled version of this CA.

METHODS: Six adult C57Bl/6 wild-type mice and six adult 5XFAD transgenic …


Bihemispheric Transcranial Direct Current Stimulation Enhances Effector-Independent Representations Of Motor Synergy And Sequence Learning., Sheena Waters-Metenier, Masud Husain, Tobias Wiestler, Jörn Diedrichsen Jan 2014

Bihemispheric Transcranial Direct Current Stimulation Enhances Effector-Independent Representations Of Motor Synergy And Sequence Learning., Sheena Waters-Metenier, Masud Husain, Tobias Wiestler, Jörn Diedrichsen

Brain and Mind Institute Researchers' Publications

Complex manual tasks-everything from buttoning up a shirt to playing the piano-fundamentally involve two components: (1) generating specific patterns of muscle activity (here, termed "synergies"); and (2) stringing these into purposeful sequences. Although transcranial direct current stimulation (tDCS) of the primary motor cortex (M1) has been found to increase the learning of motor sequences, it is unknown whether it can similarly facilitate motor synergy learning. Here, we determined the effects of tDCS on the learning of motor synergies using a novel hand configuration task that required the production of difficult muscular activation patterns. Bihemispheric tDCS was applied to M1 of …


Short-Duration Stimulation Of The Supplementary Eye Fields Perturbs Anti-Saccade Performance While Potentiating Contralateral Head Orienting., Brendan B Chapman, Brian D Corneil Jan 2014

Short-Duration Stimulation Of The Supplementary Eye Fields Perturbs Anti-Saccade Performance While Potentiating Contralateral Head Orienting., Brendan B Chapman, Brian D Corneil

Brain and Mind Institute Researchers' Publications

Many forms of brain stimulation utilize the notion of state dependency, whereby greater influences are observed when a given area is more engaged at the time of stimulation. Here, by delivering intracortical microstimulation (ICMS) to the supplementary eye fields (SEF) of monkeys performing interleaved pro- and anti-saccades, we show a surprising diversity of state-dependent effects of ICMS-SEF. Short-duration ICMS-SEF passed around cue presentation selectively disrupted anti-saccades by increasing reaction times and error rates bilaterally, and also recruited neck muscles, favoring contralateral head turning to a greater degree on anti-saccade trials. These results are consistent with the functional relevance of the …


Randomized Clinical Trial Examining Duration Of Voucher-Based Reinforcement Therapy For Cocaine Abstinence., Kimberly C Kirby, Carolyn M Carpenedo, Karen L Dugosh, Beth J Rosenwasser, Lois A Benishek, Alicia Janik, Rachel Keashen, Elena Bresani, Kenneth Silverman Oct 2013

Randomized Clinical Trial Examining Duration Of Voucher-Based Reinforcement Therapy For Cocaine Abstinence., Kimberly C Kirby, Carolyn M Carpenedo, Karen L Dugosh, Beth J Rosenwasser, Lois A Benishek, Alicia Janik, Rachel Keashen, Elena Bresani, Kenneth Silverman

Faculty Scholarship for the College of Science & Mathematics

BACKGROUND: This is the first study to systematically manipulate duration of voucher-based reinforcement therapy (VBRT) to see if extending the duration increases abstinence during and following VBRT.

METHODS: We randomized cocaine-dependent methadone-maintained adults to Standard (12 weeks; n=62) or Extended (36 weeks; n=68) VBRT and provided escalating voucher amounts contingent upon urinalysis verification of cocaine abstinence. Urinalysis was scheduled at least every 2 weeks during the 48-week study and more frequently during VBRT (3/week) and 12 weeks of Aftercare (2/week).

RESULTS: Extended VBRT produced longer durations of continuous cocaine abstinence during weeks 1-24 (5.7 vs 2.7 weeks; p=0.003) and proportionally …


Erps Reveal The Temporal Dynamics Of Auditory Word Recognition In Specific Language Impairment., Jeffrey G Malins, Amy S Desroches, Erin K Robertson, Randy Lynn Newman, Lisa M D Archibald, Marc F Joanisse Jul 2013

Erps Reveal The Temporal Dynamics Of Auditory Word Recognition In Specific Language Impairment., Jeffrey G Malins, Amy S Desroches, Erin K Robertson, Randy Lynn Newman, Lisa M D Archibald, Marc F Joanisse

Brain and Mind Institute Researchers' Publications

We used event-related potentials (ERPs) to compare auditory word recognition in children with specific language impairment (SLI group; N=14) to a group of typically developing children (TD group; N=14). Subjects were presented with pictures of items and heard auditory words that either matched or mismatched the pictures. Mismatches overlapped expected words in word-onset (cohort mismatches; see: DOLL, hear: dog), rhyme (CONE -bone), or were unrelated (SHELL -mug). In match trials, the SLI group showed a different pattern of N100 responses to auditory stimuli compared to the TD group, indicative of early auditory processing differences in SLI. However, the phonological mapping …


Dynamic And Opposing Adjustment Of Movement Cancellation And Generation In An Oculomotor Countermanding Task., Brian D Corneil, Joshua C Cheng, Samanthi C Goonetilleke Jun 2013

Dynamic And Opposing Adjustment Of Movement Cancellation And Generation In An Oculomotor Countermanding Task., Brian D Corneil, Joshua C Cheng, Samanthi C Goonetilleke

Brain and Mind Institute Researchers' Publications

Adaptive adjustments of strategies help optimize behavior in a dynamic and uncertain world. Previous studies in the countermanding (or stop-signal) paradigm have detailed how reaction times (RTs) change with trial sequence, demonstrating adaptive control of movement generation. Comparatively little is known about the adaptive control of movement cancellation in the countermanding task, mainly because movement cancellation implies the absence of an outcome and estimates of movement cancellation require hundreds of trials. Here, we exploit a within-trial proxy of movement cancellation based on recordings of neck muscle activity while human subjects attempted to cancel large eye-head gaze shifts. On a subset …


Intracranial Injection Of Gammagard, A Human Ivig, Modulates The Inflammatory Response Of The Brain And Lowers AΒ In App/Ps1 Mice Along A Different Time Course Than Anti-AΒ Antibodies, Tiffany L. Sudduth, Abigail Greenstein, Donna M. Wilcock Jun 2013

Intracranial Injection Of Gammagard, A Human Ivig, Modulates The Inflammatory Response Of The Brain And Lowers AΒ In App/Ps1 Mice Along A Different Time Course Than Anti-AΒ Antibodies, Tiffany L. Sudduth, Abigail Greenstein, Donna M. Wilcock

Sanders-Brown Center on Aging Faculty Publications

Gammagard IVIg is a therapeutic approach to treat Alzheimer's disease currently in phase 3 clinical trials. Despite the reported efficacy of the approach the mechanism of action is poorly understood. We have previously shown that intracranial injection of anti-Aβ antibodies into the frontal cortex and hippocampus reveals important information regarding the time course of events once the agent is in the brain. In the current study we compared IVIg, mouse-pooled IgG, and the anti-Aβ antibody 6E10 injected intracranially into the frontal cortex and hippocampus of 7-month-old APP/PS1 mice. We established a time course of events ranging from 1 …


The Human Brain Processes Syntax In The Absence Of Conscious Awareness., Laura Batterink, Helen J Neville May 2013

The Human Brain Processes Syntax In The Absence Of Conscious Awareness., Laura Batterink, Helen J Neville

Brain and Mind Institute Researchers' Publications

Syntax is the core computational component of language. A longstanding idea about syntactic processing is that it is generally not available to conscious access, operating autonomously and automatically. However, there is little direct neurocognitive evidence on this issue. By measuring event-related potentials while human observers performed a novel cross-modal distraction task, we demonstrated that syntactic violations that were not consciously detected nonetheless produced a characteristic early neural response pattern, and also significantly delayed reaction times to a concurrent task. This early neural response was distinct from later neural activity that was observed only to syntactic violations that were consciously detected. …


Predictors Of The Change In The Expression Of Emotional Support Within An Online Breast Cancer Support Group: A Longitudinal Study, Woohyun Yoo, Ming-Yuan Chih, Min-Woo Kwon, Junghwan Yang, Eunji Cho, Bryan Mclaughlin, Kang Namkoong, Dhavan V. Shah, David H. Gustafson Jan 2013

Predictors Of The Change In The Expression Of Emotional Support Within An Online Breast Cancer Support Group: A Longitudinal Study, Woohyun Yoo, Ming-Yuan Chih, Min-Woo Kwon, Junghwan Yang, Eunji Cho, Bryan Mclaughlin, Kang Namkoong, Dhavan V. Shah, David H. Gustafson

Community & Leadership Development Faculty Publications

OBJECTIVES: To explore how the expression of emotional support in an online breast cancer support group changes over time, and what factors predict this pattern of change.

METHODS: We conducted growth curve modeling with data collected from 192 participants in an online breast cancer support group within the Comprehensive Health Enhancement Support System (CHESS) during a 24-week intervention period.

RESULTS: Individual expression of emotional support tends to increase over time for the first 12 weeks of the intervention, but then decrease slightly with time after that. In addition, we found that age, living situation, comfort level with computer and the …


Practice Effects In A Longitudinal, Multi-Center Alzheimer's Disease Prevention Clinical Trial, Erin L. Abner, Brandon C. Dennis, Melissa J. Mathews, Marta S. Mendiondo, Allison Caban-Holt, Richard J. Kryscio, Frederick A. Schmitt, John J. Crowley Nov 2012

Practice Effects In A Longitudinal, Multi-Center Alzheimer's Disease Prevention Clinical Trial, Erin L. Abner, Brandon C. Dennis, Melissa J. Mathews, Marta S. Mendiondo, Allison Caban-Holt, Richard J. Kryscio, Frederick A. Schmitt, John J. Crowley

Sanders-Brown Center on Aging Faculty Publications

BACKGROUND: Practice effects are a known threat to reliability and validity in clinical trials. Few studies have investigated the potential influence of practice on repeated screening measures in longitudinal clinical trials with a focus on dementia prevention. The current study investigates whether practice effects exist on a screening measure commonly used in aging research, the Memory Impairment Screen (MIS).

METHODS: The PREADViSE trial is a clinical intervention study evaluating the efficacy of vitamin E and selenium for Alzheimer's disease prevention. Participants are screened annually for incident dementia with the MIS. Participants with baseline and three consecutive follow-ups who made less …


Specific Contributions Of Ventromedial, Anterior Cingulate, And Lateral Prefrontal Cortex For Attentional Selection And Stimulus Valuation., Daniel Kaping, Martin Vinck, R Matthew Hutchison, Stefan Everling, Thilo Womelsdorf Dec 2011

Specific Contributions Of Ventromedial, Anterior Cingulate, And Lateral Prefrontal Cortex For Attentional Selection And Stimulus Valuation., Daniel Kaping, Martin Vinck, R Matthew Hutchison, Stefan Everling, Thilo Womelsdorf

Brain and Mind Institute Researchers' Publications

Attentional control ensures that neuronal processes prioritize the most relevant stimulus in a given environment. Controlling which stimulus is attended thus originates from neurons encoding the relevance of stimuli, i.e. their expected value, in hand with neurons encoding contextual information about stimulus locations, features, and rules that guide the conditional allocation of attention. Here, we examined how these distinct processes are encoded and integrated in macaque prefrontal cortex (PFC) by mapping their functional topographies at the time of attentional stimulus selection. We find confined clusters of neurons in ventromedial PFC (vmPFC) that predominantly convey stimulus valuation information during attention shifts. …


Paradoxical Reversal Learning Enhancement By Stress Or Prefrontal Cortical Damage: Rescue With Bdnf., Carolyn Graybeal, Michael Feyder, Emily Schulman, Lisa M Saksida, Timothy J Bussey, Jonathan L Brigman, Andrew Holmes Nov 2011

Paradoxical Reversal Learning Enhancement By Stress Or Prefrontal Cortical Damage: Rescue With Bdnf., Carolyn Graybeal, Michael Feyder, Emily Schulman, Lisa M Saksida, Timothy J Bussey, Jonathan L Brigman, Andrew Holmes

Brain and Mind Institute Researchers' Publications

Stress affects various forms of cognition. We found that moderate stress enhanced late reversal learning in a mouse touchscreen-based choice task. Ventromedial prefrontal cortex (vmPFC) lesions mimicked the effect of stress, whereas orbitofrontal and dorsolateral striatal lesions impaired reversal. Stress facilitation of reversal was prevented by BDNF infusion into the vmPFC. These findings suggest a mechanism by which stress-induced vmPFC dysfunction disinhibits learning by alternate (for example, striatal) systems.


The Effect Of Dopamine Therapy On Ventral And Dorsal Striatum-Mediated Cognition In Parkinson's Disease: Support From Functional Mri., Penny A Macdonald, Alex A Macdonald, Ken N Seergobin, Ruzbeh Tamjeedi, Hooman Ganjavi, Jean-Sebastien Provost, Oury Monchi May 2011

The Effect Of Dopamine Therapy On Ventral And Dorsal Striatum-Mediated Cognition In Parkinson's Disease: Support From Functional Mri., Penny A Macdonald, Alex A Macdonald, Ken N Seergobin, Ruzbeh Tamjeedi, Hooman Ganjavi, Jean-Sebastien Provost, Oury Monchi

Brain and Mind Institute Researchers' Publications

The central aim of our study was to elucidate functions mediated by the ventral and dorsal striatum, respectively, to better understand the cognitive effects of dopamine replacement in Parkinson's disease. We proposed that the ventral striatum underlies general learning of stimulus associations, whereas the dorsal striatum promotes integration of various influences on selecting. In Parkinson's disease, dopamine depletion is substantially less notable in the ventral relative to the dorsal striatum, and therefore greater improvements are expected for dorsal striatum-mediated functions with dopamine replacement. Using a simple selection task, we found that dopamine replacement impaired encoding and facilitation of consistent stimulus-stimulus …


Effect Of Donor Ethnicity On Kidney Survival In Different Recipient Pairs: An Analysis Of The Optn/Unos Database., C O. Callender, W S. Cherikh, P Traverso, A Hernandez, Tolulope A. Oyetunji, D Chang Dec 2009

Effect Of Donor Ethnicity On Kidney Survival In Different Recipient Pairs: An Analysis Of The Optn/Unos Database., C O. Callender, W S. Cherikh, P Traverso, A Hernandez, Tolulope A. Oyetunji, D Chang

Manuscripts, Articles, Book Chapters and Other Papers

BACKGROUND: Previous multivariate analysis performed between April 1, 1994, and December 31, 2000 from the Organ Procurement Transplant Network/United Network for Organ Sharing (OPTN/UNOS) database has shown that kidneys from black donors were associated with lower graft survival. We compared graft and patient survival of different kidney donor-to-recipient ethnic combinations to see if this result still holds on a recent cohort of US kidney transplants.

METHODS: We included 72,495 recipients of deceased and living donor kidney alone transplants from 2001 to 2005. A multivariate Cox regression method was used to analyze the effect of donor-recipient ethnicity on graft and patient …


Pregnant Teenager Involvement In Sexual Activity And The Social Context, Maria José Carvalho Sant'anna, Júlia Kerr Catunda, Kepler Alencar Mendes Carvalho, Verônica Coates, Hatim A. Omar Aug 2006

Pregnant Teenager Involvement In Sexual Activity And The Social Context, Maria José Carvalho Sant'anna, Júlia Kerr Catunda, Kepler Alencar Mendes Carvalho, Verônica Coates, Hatim A. Omar

Pediatrics Faculty Publications

Pregnancy during adolescence represents a challenge to society as a whole. Its incidence is increasing and brings about social and medical consequences to both the teen mothers and their children. The purpose of this study was to evaluate pregnant teenager involvement in sexual activity and the social context. The group studied comprised 152 pregnant teenagers attending the Department of Pediatrics, Santa Casa de Sao Paulo (SCSP) General Hospital. All information was analyzed. The age at first intercourse was 14.2 years and the average period between first intercourse and pregnancy was 1.4 years. Most pregnancies (75%) were neither planned nor wanted, …


Glutamate Receptors In Perirhinal Cortex Mediate Encoding, Retrieval, And Consolidation Of Object Recognition Memory., Boyer D Winters, Timothy J Bussey Apr 2005

Glutamate Receptors In Perirhinal Cortex Mediate Encoding, Retrieval, And Consolidation Of Object Recognition Memory., Boyer D Winters, Timothy J Bussey

Brain and Mind Institute Researchers' Publications

Object recognition is consistently impaired in human amnesia and animal models thereof. Results from subjects with permanent brain damage have revealed the importance of the perirhinal cortex to object recognition memory. Here, we report evidence from rats for interdependent but distinct stages in object recognition memory (encoding, retrieval, and consolidation), which require glutamate receptor activity within perirhinal cortex. Transient blockade of AMPA receptor-mediated synaptic transmission within perirhinal cortex disrupted encoding for short- and long-term memory as well as retrieval and consolidation. In contrast, transient NMDA receptor blockade during encoding affected only long-term object recognition memory; NMDA receptor activity was also …


Transient Inactivation Of Perirhinal Cortex Disrupts Encoding, Retrieval, And Consolidation Of Object Recognition Memory., Boyer D Winters, Timothy J Bussey Jan 2005

Transient Inactivation Of Perirhinal Cortex Disrupts Encoding, Retrieval, And Consolidation Of Object Recognition Memory., Boyer D Winters, Timothy J Bussey

Brain and Mind Institute Researchers' Publications

Damage to perirhinal cortex (PRh) impairs object recognition memory in humans, monkeys, and rats when tested in tasks such as delayed nonmatching to sample, visual paired comparison, and its rodent analog, the spontaneous object recognition task. In the present study, we have capitalized on the discrete one-trial nature of the spontaneous object recognition task to investigate the role of PRh in several distinct stages of object recognition memory. In a series of experiments, transient inactivation of PRh was accomplished with bilateral infusions of lidocaine directly into PRh immediately before the sample phase (encoding), immediately before the choice phase (retrieval), or …


The Validity Of The Brief Version Of The Fear Of Negative Evaluation Scale., Kerry A Collins, Henny A Westra, David J A Dozois, Sherry H Stewart Jan 2005

The Validity Of The Brief Version Of The Fear Of Negative Evaluation Scale., Kerry A Collins, Henny A Westra, David J A Dozois, Sherry H Stewart

Psychology Publications

The Fear of Negative Evaluation Scale [FNE; J. Consult. Clin. Psychol. 33 (1969) 448] is a commonly used measure of social anxiety. A brief version of the scale (FNEB) is available for convenient administration. Despite being widely advocated for use, the psychometric properties of the FNEB have not been evaluated with clinically anxious samples. The present study addressed the reliability and validity of the FNEB in a clinical sample of individuals with either social phobia (n = 82) or panic disorder (n = 99) presenting for treatment. Factor analysis supported the construct validity of the FNEB. The validity of the …


A Longitudinal Investigation Of Information Processing And Cognitive Organization In Clinical Depression: Stability Of Schematic Interconnectedness., D J Dozois, K S Dobson Dec 2001

A Longitudinal Investigation Of Information Processing And Cognitive Organization In Clinical Depression: Stability Of Schematic Interconnectedness., D J Dozois, K S Dobson

Psychology Publications

This study longitudinally investigated information processing and cognitive organization in clinical depression. The main hypothesis was that individuals whose depression had remitted would show a significant cognitive shift on information processing (e.g., deactivation of negative processing) but not on cognitive organizational tasks, Forty-five individuals with clinical depression completed 2 information processing and 2 cognitive organizational tasks at initial assessment. At 6-month follow-up, the sample (23 remitted, 22 stable depressed) was readministered the tasks. As expected, information processing shifted significantly in individuals who had improved symptomatically, whereas negative cognitive organizational indices remained stable. The implications of these results are discussed as …