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Articles 271 - 294 of 294
Full-Text Articles in Medicine and Health Sciences
Microglia And Neurons In The Hippocampus Of Migratory Sandpipers., C G Diniz, N G M Magalhães, A A Sousa, C Santos Filho, D G Diniz, C M Lima, M A Oliveira, D C Paulo, P D C Pereira, D F Sherry, C W Picanço-Diniz
Microglia And Neurons In The Hippocampus Of Migratory Sandpipers., C G Diniz, N G M Magalhães, A A Sousa, C Santos Filho, D G Diniz, C M Lima, M A Oliveira, D C Paulo, P D C Pereira, D F Sherry, C W Picanço-Diniz
Brain and Mind Institute Researchers' Publications
The semipalmated sandpiper Calidris pusilla and the spotted sandpiper Actitis macularia are long- and short-distance migrants, respectively. C. pusilla breeds in the sub-arctic and mid-arctic tundra of Canada and Alaska and winters on the north and east coasts of South America. A. macularia breeds in a broad distribution across most of North America from the treeline to the southern United States. It winters in the southern United States, and Central and South America. The autumn migration route of C. pusilla includes a non-stop flight over the Atlantic Ocean, whereas autumn route of A. macularia is largely over land. Because of …
High Intensity Aerobic Exercise Training Improves Deficits Of Cardiovascular Autonomic Function In A Rat Model Of Type 1 Diabetes Mellitus With Moderate Hyperglycemia, Kenneth N. Grisé, T. Dylan Olver, Matthew W. Mcdonald, Adwitia Dey, Mao Jiang, James C. Lacefield, J. Kevin Shoemaker, Earl G. Noble, C. W.James Melling
High Intensity Aerobic Exercise Training Improves Deficits Of Cardiovascular Autonomic Function In A Rat Model Of Type 1 Diabetes Mellitus With Moderate Hyperglycemia, Kenneth N. Grisé, T. Dylan Olver, Matthew W. Mcdonald, Adwitia Dey, Mao Jiang, James C. Lacefield, J. Kevin Shoemaker, Earl G. Noble, C. W.James Melling
Bone and Joint Institute
© 2016 Kenneth N. Grisé et al. Indices of cardiovascular autonomic neuropathy (CAN) in experimental models of Type 1 diabetes mellitus (T1DM) are often contrary to clinical data. Here, we investigated whether a relatable insulin-treated model of T1DM would induce deficits in cardiovascular (CV) autonomic function more reflective of clinical results and if exercise training could prevent those deficits. Sixty-four rats were divided into four groups: sedentary control (C), sedentary T1DM (D), control exercise (CX), or T1DM exercise (DX). Diabetes was induced via multiple low-dose injections of streptozotocin and blood glucose was maintained at moderate hyperglycemia (9-17 mM) through insulin …
Correlation Between Resting State Fmri Total Neuronal Activity And Pet Metabolism In Healthy Controls And Patients With Disorders Of Consciousness., Andrea Soddu, Francisco Gómez, Lizette Heine, Carol Di Perri, Mohamed Ali Bahri, Henning U Voss, Marie-Aurélie Bruno, Audrey Vanhaudenhuyse, Christophe Phillips, Athena Demertzi, Camille Chatelle, Jessica Schrouff, Aurore Thibaut, Vanessa Charland-Verville, Quentin Noirhomme, Eric Salmon, Jean-Flory Luaba Tshibanda, Nicholas D Schiff, Steven Laureys
Correlation Between Resting State Fmri Total Neuronal Activity And Pet Metabolism In Healthy Controls And Patients With Disorders Of Consciousness., Andrea Soddu, Francisco Gómez, Lizette Heine, Carol Di Perri, Mohamed Ali Bahri, Henning U Voss, Marie-Aurélie Bruno, Audrey Vanhaudenhuyse, Christophe Phillips, Athena Demertzi, Camille Chatelle, Jessica Schrouff, Aurore Thibaut, Vanessa Charland-Verville, Quentin Noirhomme, Eric Salmon, Jean-Flory Luaba Tshibanda, Nicholas D Schiff, Steven Laureys
Brain and Mind Institute Researchers' Publications
INTRODUCTION: The mildly invasive 18F-fluorodeoxyglucose positron emission tomography (FDG-PET) is a well-established imaging technique to measure 'resting state' cerebral metabolism. This technique made it possible to assess changes in metabolic activity in clinical applications, such as the study of severe brain injury and disorders of consciousness.
OBJECTIVE: We assessed the possibility of creating functional MRI activity maps, which could estimate the relative levels of activity in FDG-PET cerebral metabolic maps. If no metabolic absolute measures can be extracted, our approach may still be of clinical use in centers without access to FDG-PET. It also overcomes the problem of recognizing individual …
“Why Would I Want To Go Out?”: Age-Related Vision Loss And Social Participation, Debbie Rudman, Deborah Gold, Colleen Mcgrath, Biljana Zuvela, Marlee Spafford, Rebecca Renwick
“Why Would I Want To Go Out?”: Age-Related Vision Loss And Social Participation, Debbie Rudman, Deborah Gold, Colleen Mcgrath, Biljana Zuvela, Marlee Spafford, Rebecca Renwick
Occupational Therapy Publications
Social participation, a key determinant of healthy aging, is often negatively impacted by age-related vision loss (ARVL). This grounded theory study aimed to understand social participation as a process negotiated in everyday life by older adults with ARVL. Interviews, audio diaries, and life-space maps were used to collect data with 21 older adults in two Ontario cities. Inductive data analysis resulted in a transactional model of the process of negotiating social participation in context. This model depicts how environmental features and resources, skills and abilities, and risks and vulnerabilities transacted with values and priorities to affect if and how social …
Efficacy Of Exercise Therapy In Workers With Rotator Cuff Tendinopathy: A Systematic Review, François Desmeules, Jennifer Boudreault, Clermont E. Dionne, Pierre Frémont, Véronique Lowry, Joy C. Macdermid, Jean Sébastien Roy
Efficacy Of Exercise Therapy In Workers With Rotator Cuff Tendinopathy: A Systematic Review, François Desmeules, Jennifer Boudreault, Clermont E. Dionne, Pierre Frémont, Véronique Lowry, Joy C. Macdermid, Jean Sébastien Roy
Bone and Joint Institute
Objective: To perform a systematic review of randomized controlled trials (RCTs) on the efficacy of therapeutic exercises for workers suffering from rotator cuff (RC) tendinopathy. Methods: A literature search in four bibliographical databases (Pubmed, CINAHL, EMBASE, and PEDro) was conducted from inception up to February 2015. RCTs were included if participants were workers suffering from RC tendinopathy, the outcome measures included work-related outcomes, and at least one of the interventions under study included exercises. The methodological quality of the studies was evaluated with the Cochrane Risk of Bias Assessment tool. Results: The mean methodological score of the ten included studies …
Motor Skill Acquisition Promotes Human Brain Myelin Plasticity, Bimal Lakhani, Michael R. Borich, Jacob N. Jackson, Katie P. Wadden, Sue Peters, Anica Villamayor, Alex L. Mackay, Irene M. Vavasour, Alexander Rauscher, Lara A. Boyd
Motor Skill Acquisition Promotes Human Brain Myelin Plasticity, Bimal Lakhani, Michael R. Borich, Jacob N. Jackson, Katie P. Wadden, Sue Peters, Anica Villamayor, Alex L. Mackay, Irene M. Vavasour, Alexander Rauscher, Lara A. Boyd
Physical Therapy Publications
Experience-dependent structural changes are widely evident in gray matter. Using diffusion weighted imaging (DWI), the neuroplastic effect of motor training on white matter in the brain has been demonstrated. However, in humans it is not known whether specific features of white matter relate to motor skill acquisition or if these structural changes are associated to functional network connectivity. Myelin can be objectively quantified in vivo and used to index specific experience-dependent change. In the current study, seventeen healthy young adults completed ten sessions of visuomotor skill training (10,000 total movements) using the right arm. Multicomponent relaxation imaging was performed before …
Visual Acceleration Perception For Simple And Complex Motion Patterns., Alexandra S Mueller, Brian Timney
Visual Acceleration Perception For Simple And Complex Motion Patterns., Alexandra S Mueller, Brian Timney
Brain and Mind Institute Researchers' Publications
Humans are able to judge whether a target is accelerating in many viewing contexts, but it is an open question how the motion pattern per se affects visual acceleration perception. We measured acceleration and deceleration detection using patterns of random dots with horizontal (simpler) or radial motion (more visually complex). The results suggest that we detect acceleration better when viewing radial optic flow than horizontal translation. However, the direction within each type of pattern has no effect on performance and observers detect acceleration and deceleration similarly within each condition. We conclude that sensitivity to the presence of acceleration is generally …
Nicotine Directly Induces Endoplasmic Reticulum Stress Response In Rat Placental Trophoblast Giant Cells, Daniel B. Hardy
Nicotine Directly Induces Endoplasmic Reticulum Stress Response In Rat Placental Trophoblast Giant Cells, Daniel B. Hardy
Physiology and Pharmacology Publications
Nicotine exposure during pregnancy leads to placental insufficiency impairing both fetal and neonatal development. Previous studies from our laboratory have demonstrated that in rats, nicotine augmented endoplasmic reticulum (ER) stress in association with placental insufficiency; however, the underlying mechanisms remain elusive. Therefore, we sought to investigate the possible direct effect of nicotine on ER stress in Rcho-1 rat placental trophoblast giant (TG) cells during differentiation. Protein and/or mRNA expression of markers involved in ER stress (eg, phosphorylated PERK, eIF2α, CHOP, and BiP/GRP78) and TG cell differentiation and function (eg, Pl-1, placental growth factor [Pgf], Hsd11b1, and Hsd11b2) were quantified via …
Ovarian Tumour Growth Is Characterized By Mevalonate Pathway Gene Signature In An Orthotopic, Syngeneic Model Of Epithelial Ovarian Cancer, Daniel B. Hardy
Ovarian Tumour Growth Is Characterized By Mevalonate Pathway Gene Signature In An Orthotopic, Syngeneic Model Of Epithelial Ovarian Cancer, Daniel B. Hardy
Physiology and Pharmacology Publications
Epithelial ovarian cancer (EOC) is the most lethal gynecological cancer and often is not detected until late stages when cancer cells transcoelomically metastasize to the abdomen and typically become resistant to therapy resulting in very low survival rates. We utilize an orthotopic, syngeneic mouse model to study late stage disease and have discovered that the tumor cells within the abdominal ascites are irreversibly re-programmed, with an increased tumorigenicity and resistance to apoptosis. The goal of this study was to characterize the reprogramming that occurred in the aggressive ascites-derived cells (28-2 cells) compared to the original cell line used for tumor …
Nicotine Directly Induces Endoplasmic Reticulum Stress Response In Rat Placental Trophoblast Giant Cells, Michael K. Wong, Alison Holloway C, Daniel B. Hardy
Nicotine Directly Induces Endoplasmic Reticulum Stress Response In Rat Placental Trophoblast Giant Cells, Michael K. Wong, Alison Holloway C, Daniel B. Hardy
Physiology and Pharmacology Publications
Nicotine exposure during pregnancy leads to placental insufficiency impairing both fetal and neonatal development. Previous studies from our laboratory have demonstrated that in rats,nicotine augmented endoplasmic reticulum (ER) stress in association with placental insufficiency, however, the underlying mechanisms remain elusive. Therefore, we sought to investigate the possible direct effect of nicotine on ER stress in Rcho-1 rat placental trophoblastgiant (TG) cells during differentiation. Protein and/or mRNA expression of markers involved in ER stress (e.g., phosphorylated PERK, eIF2α, CHOP, BiP/GRP78) and trophoblast giant cell differentiation and function (e.g., Pl-1, Pgf, Hsd11b1, and Hsd11b2) were quantified via Western blot or …
Does Deep Cervical Flexor Muscle Training Affect Pain Pressure Thresholds Of Myofascial Trigger Points In Patients With Chronic Neck Pain? A Prospective Randomized Controlled Trial, Pavlos Bobos, Evdokia Billis, Dimitra Tania Papanikolaou, Constantinos Koutsojannis, Joy C. Macdermid
Does Deep Cervical Flexor Muscle Training Affect Pain Pressure Thresholds Of Myofascial Trigger Points In Patients With Chronic Neck Pain? A Prospective Randomized Controlled Trial, Pavlos Bobos, Evdokia Billis, Dimitra Tania Papanikolaou, Constantinos Koutsojannis, Joy C. Macdermid
Bone and Joint Institute
© 2016 Pavlos Bobos et al. Background. We need to understand more about how DNF performs in different contexts and whether it affects the pain threshold over myofascial trigger points (MTrPs). Purpose. The objectives were to investigate the effect of neck muscles training on disability and pain and on pain threshold over MTrPs in people with chronic neck pain. Methods. Patients with chronic neck pain were eligible for participation with a Neck Disability Index (NDI) score of over 5/50 and having at least one MTrP on either levator scapulae, upper trapezoid, or splenius capitis muscle. Patients were randomly assigned into …
Research Priorities In The Field Of Posttraumatic Pain And Disability: Results Of A Transdisciplinary Consensus-Generating Workshop, David M. Walton, James M. Elliott, Joshua Lee, Eldon Loh, Joy C. Macdermid, Siobhan Schabrun, Walter L. Siqueira, Brian D. Corneil, Bill Aal, Trevor Birmingham, Amy Brown, Lynn K. Cooper, James P. Dickey, S. Jeffrey Dixon, Douglas D. Fraser, Joseph S. Gati, Gregory B. Gloor, Gordon Good, David Holdsworth, Samuel A. Mclean, Wanda Millard, Jordan Miller, Jackie Sadi, David A. Seminowicz, J. Kevin Shoemaker, Gunter P. Siegmund, Theodore Vertseegh, Timothy H. Wideman
Research Priorities In The Field Of Posttraumatic Pain And Disability: Results Of A Transdisciplinary Consensus-Generating Workshop, David M. Walton, James M. Elliott, Joshua Lee, Eldon Loh, Joy C. Macdermid, Siobhan Schabrun, Walter L. Siqueira, Brian D. Corneil, Bill Aal, Trevor Birmingham, Amy Brown, Lynn K. Cooper, James P. Dickey, S. Jeffrey Dixon, Douglas D. Fraser, Joseph S. Gati, Gregory B. Gloor, Gordon Good, David Holdsworth, Samuel A. Mclean, Wanda Millard, Jordan Miller, Jackie Sadi, David A. Seminowicz, J. Kevin Shoemaker, Gunter P. Siegmund, Theodore Vertseegh, Timothy H. Wideman
Bone and Joint Institute
© Copyright 2016 David M.Walton et al. Background. Chronic or persistent pain and disability following noncatastrophic 'musculoskeletal' (MSK) trauma is a pervasive public health problem. Recent intervention trials have provided little evidence of benefit from several specific treatments for preventing chronic problems. Such findings may appear to argue against formal targeted intervention for MSK traumas. However, these negative findings may reflect a lack of understanding of the causal mechanisms underlying the transition from acute to chronic pain, rendering informed and objective treatment decisions difficult. The Canadian Institutes of Health Research (CIHR) Institute ofMusculoskeletalHealth and Arthritis (IMHA) has recently identified better …
Research Priorities In The Field Of Posttraumatic Pain And Disability: Results Of A Transdisciplinary Consensus-Generating Workshop, David M. Walton, James M. Elliott, Joshua Lee
Research Priorities In The Field Of Posttraumatic Pain And Disability: Results Of A Transdisciplinary Consensus-Generating Workshop, David M. Walton, James M. Elliott, Joshua Lee
Bone and Joint Institute
No abstract provided.
Re-Evaluation Of Low Intensity Pulsed Ultrasound In Treatment Of Tibial Fractures (Trust): Randomized Clinical Trial, Jason W. Busse, Mohit Bhandari, Thomas A. Einhorn, Emil Schemitsch, James D. Heckman, Paul Tornetta, Kwok Sui Leung, Diane Heels-Ansdell, Sun Makosso-Kallyth, Gregory J. Della Rocca, Clifford B. Jones, Gordon H. Guyatt
Re-Evaluation Of Low Intensity Pulsed Ultrasound In Treatment Of Tibial Fractures (Trust): Randomized Clinical Trial, Jason W. Busse, Mohit Bhandari, Thomas A. Einhorn, Emil Schemitsch, James D. Heckman, Paul Tornetta, Kwok Sui Leung, Diane Heels-Ansdell, Sun Makosso-Kallyth, Gregory J. Della Rocca, Clifford B. Jones, Gordon H. Guyatt
Bone and Joint Institute
Objective: To determine whether low intensity pulsed ultrasound (LIPUS), compared with sham treatment, accelerates functional recovery and radiographic healing in patients with operatively managed tibial fractures. Design: A concealed, randomized, blinded, sham controlled clinical trial with a parallel group design of 501 patients, enrolled between October 2008 and September 2012, and followed for one year. Setting: 43 North American academic trauma centers. Participants: Skeletally mature men or women with an open or closed tibial fracture amenable to intramedullary nail fixation. Exclusions comprised pilon fractures, tibial shaft fractures that extended into the joint and required reduction, pathological fractures, bilateral tibial fractures, …
Impaired Cerebrovascular Function In Coronary Artery Disease Patients And Recovery Following Cardiac Rehabilitation, Udunna C. Anazodo, J. K. Shoemaker, Neville Suskin, Tracy Ssali, Danny J.J. Wang, Keith S. St. Lawrence
Impaired Cerebrovascular Function In Coronary Artery Disease Patients And Recovery Following Cardiac Rehabilitation, Udunna C. Anazodo, J. K. Shoemaker, Neville Suskin, Tracy Ssali, Danny J.J. Wang, Keith S. St. Lawrence
Bone and Joint Institute
© 2016 Anazodo, Shoemaker, Suskin, Ssali, Wang and St. Lawrence. Coronary artery disease (CAD) poses a risk to the cerebrovascular function of older adults and has been linked to impaired cognitive abilities. Using magnetic resonance perfusion imaging, we investigated changes in resting cerebral blood flow (CBF) and cerebrovascular reactivity (CVR) to hypercapnia in 34 CAD patients and 21 age-matched controls. Gray matter volume (GMV)s were acquired and used as a confounding variable to separate changes in structure from function. Compared to healthy controls, CAD patients demonstrated reduced CBF in the superior frontal, anterior cingulate (AC), insular, pre- and post-central gyri, …
The Development And Validation Of A Multivariable Model To Predict Whether Patients Referred For Total Knee Replacement Are Suitable Surgical Candidates At The Time Of Initial Consultation, Laura Churchill, Samuel J. Malian, Bert M. Chesworth, Dianne Bryant, Steven J. Macdonald, Jacquelyn D. Marsh, J. Robert Giffin
The Development And Validation Of A Multivariable Model To Predict Whether Patients Referred For Total Knee Replacement Are Suitable Surgical Candidates At The Time Of Initial Consultation, Laura Churchill, Samuel J. Malian, Bert M. Chesworth, Dianne Bryant, Steven J. Macdonald, Jacquelyn D. Marsh, J. Robert Giffin
Bone and Joint Institute
Background: In previous studies, 50%-70% of patients referred to orthopedic surgeons for total knee replacement (TKR) were not surgical candidates at the time of initial assessment. The purpose of our study was to identify and cross-validate patient self-reported predictors of suitability for TKR and to determine the clinical utility of a predictive model to guide the timing and appropriateness of referral to a surgeon. Methods: We assessed pre-consultation patient data as well as the surgeon's findings and post-consultation recommendations. We used multivariate logistic regression to detect self-reported items that could identify suitable surgical candidates. Results: Patients' willingness to undergo surgery, …
Aberrant Functional Connectivity Of The Amygdala Complexes In Ptsd During Conscious And Subconscious Processing Of Trauma-Related Stimuli, Daniela Rabellino, Maria Densmore, Paul A Frewen, Jean Theberge, Margaret C Mckinnon, Ruth A Lanius
Aberrant Functional Connectivity Of The Amygdala Complexes In Ptsd During Conscious And Subconscious Processing Of Trauma-Related Stimuli, Daniela Rabellino, Maria Densmore, Paul A Frewen, Jean Theberge, Margaret C Mckinnon, Ruth A Lanius
Department of Medicine Publications
Post-traumatic stress disorder (PTSD) is characterized by altered functional connectivity of the amygdala complexes at rest. However, amygdala complex connectivity during conscious and subconscious threat processing remains to be elucidated. Here, we investigate specific connectivity of the centromedial amygdala (CMA) and basolateral amygdala (BLA) during conscious and subconscious processing of trauma-related words among individuals with PTSD (n = 26) as compared to non-trauma-exposed controls (n = 20). Psycho-physiological interaction analyses were performed using the right and left amygdala complexes as regions of interest during conscious and subconscious trauma word processing. These analyses revealed a differential, context-dependent responses by each amygdala …
Acc Neuro-Over-Connectivity Is Associated With Mathematically Modeled Additional Encoding Operations Of Schizophrenia Stroop-Task Performance, Reggie Taylor, Jean Theberge, Peter C Williamson, Maria Densmore, Richard W J Neufeld
Acc Neuro-Over-Connectivity Is Associated With Mathematically Modeled Additional Encoding Operations Of Schizophrenia Stroop-Task Performance, Reggie Taylor, Jean Theberge, Peter C Williamson, Maria Densmore, Richard W J Neufeld
Department of Medicine Publications
Functional magnetic resonance imaging at 7.0 Tesla was undertaken among Schizophrenia participants (Sz), and clinical (major mood disorder; MDD) and healthy controls (HC), during performance of the Stoop task. Stroop conditions included congruent and incongruent word color items, color-only items, and word-only items. Previous modeling results extended to this most widely used selective-attention task. All groups executed item-encoding operations (subprocesses of the item encoding process) at the same rate (performance accuracy being similarly high throughout), thus displaying like processing capacity; Sz participants, however, employed more subprocesses for item completions than did the MDD participants, who in turn used more subprocesses …
Consensus Classifications Of Gross Motor, Manual Ability, And Communication Function Classification Systems Between Therapists And Parents Of Children With Cerebral Palsy., Doreen J Bartlett, Barbara Galuppi, Robert J Palisano, Sarah Westcott Mccoy
Consensus Classifications Of Gross Motor, Manual Ability, And Communication Function Classification Systems Between Therapists And Parents Of Children With Cerebral Palsy., Doreen J Bartlett, Barbara Galuppi, Robert J Palisano, Sarah Westcott Mccoy
Physical Therapy Publications
No abstract provided.
“Activated, But Stuck”: Applying A Critical Occupational Lens To Examine The Negotiation Of Long-Term Unemployment In Contemporary Socio-Political Contexts, Debbie Rudman, Rebecca Aldrich
“Activated, But Stuck”: Applying A Critical Occupational Lens To Examine The Negotiation Of Long-Term Unemployment In Contemporary Socio-Political Contexts, Debbie Rudman, Rebecca Aldrich
Occupational Therapy Publications
Solutions for the problem of long-term unemployment are increasingly shaped by neoliberally-informed logics of activation and austerity. Because the implications of these governing frameworks for everyday life are not well understood, this pilot study applied a critical occupational science perspective to understand how long-term unemployment is negotiated within contemporary North American socio-political contexts. This perspective highlights the implications of policy and employment service re-configurations for the range of activities that constitute everyday life. Methods: Using a collaborative ethnographic community-engaged research approach, we recruited eight people in Canada and the United States who self-identified as experiencing long-term unemployment. We analyzed interviews …
Distinct Visual Processing Of Real Objects And Pictures Of Those Objects In 7- To 9-Month-Old Infants., Theresa M Gerhard, Jody C Culham, Gudrun Schwarzer
Distinct Visual Processing Of Real Objects And Pictures Of Those Objects In 7- To 9-Month-Old Infants., Theresa M Gerhard, Jody C Culham, Gudrun Schwarzer
Brain and Mind Institute Researchers' Publications
The present study examined 7- and 9-month-old infants' visual habituation to real objects and pictures of the same objects and their preferences between real and pictorial versions of the same objects following habituation. Different hypotheses would predict that infants may habituate faster to pictures than real objects (based on proposed theoretical links between behavioral habituation in infants and neuroimaging adaptation in adults) or to real objects vs. pictures (based on past infant electrophysiology data). Sixty-one 7-month-old infants and fifty-nine 9-month-old infants were habituated to either a real object or a picture of the same object and afterward preference tested with …
Equal-Magnitude Size-Weight Illusions Experienced Within And Between Object Categories., Gavin Buckingham, Melvyn A Goodale, Justin A White, David A Westwood
Equal-Magnitude Size-Weight Illusions Experienced Within And Between Object Categories., Gavin Buckingham, Melvyn A Goodale, Justin A White, David A Westwood
Brain and Mind Institute Researchers' Publications
In the size-weight illusion (SWI), small objects feel heavier than larger objects of the same mass. This effect is typically thought to be a consequence of the lifter's expectation that the large object will outweigh the small object, because objects of the same type typically get heavier as they get larger. Here, we show that this perceptual effect can occur across object category, where there are no strong expectations about the correspondence between size and mass. One group of participants lifted same-colored large and small cubes with the same mass as one another, while another group lifted differently-colored large and …
Working Memory Training And Speech In Noise Comprehension In Older Adults., Rachel V Wayne, Cheryl Hamilton, Julia Jones Huyck, Ingrid S Johnsrude
Working Memory Training And Speech In Noise Comprehension In Older Adults., Rachel V Wayne, Cheryl Hamilton, Julia Jones Huyck, Ingrid S Johnsrude
Brain and Mind Institute Researchers' Publications
Understanding speech in the presence of background sound can be challenging for older adults. Speech comprehension in noise appears to depend on working memory and executive-control processes (e.g., Heald and Nusbaum, 2014), and their augmentation through training may have rehabilitative potential for age-related hearing loss. We examined the efficacy of adaptive working-memory training (Cogmed; Klingberg et al., 2002) in 24 older adults, assessing generalization to other working-memory tasks (near-transfer) and to other cognitive domains (far-transfer) using a cognitive test battery, including the Reading Span test, sensitive to working memory (e.g., Daneman and Carpenter, 1980). We also assessed far transfer to …
Design And Evaluation Of An Mri-Compatible Linear Motion Stage., Mohammad Ali Tavallaei, Patricia M Johnson, Junmin Liu, Maria Drangova
Design And Evaluation Of An Mri-Compatible Linear Motion Stage., Mohammad Ali Tavallaei, Patricia M Johnson, Junmin Liu, Maria Drangova
Medical Biophysics Publications
PURPOSE: To develop and evaluate a tool for accurate, reproducible, and programmable motion control of imaging phantoms for use in motion sensitive magnetic resonance imaging (MRI) appli cations.
METHODS: In this paper, the authors introduce a compact linear motion stage that is made of nonmagnetic material and is actuated with an ultrasonic motor. The stage can be positioned at arbitrary positions and orientations inside the scanner bore to move, push, or pull arbitrary phantoms. Using optical trackers, measuring microscopes, and navigators, the accuracy of the stage in motion control was evaluated. Also, the effect of the stage on image signal-to-noise …