Calciumsignalextract: A Matlab Gui To Automatically Extract The Activity Of Multiple Cells From Calcium Imaging Data,
2015
Rockefeller University
Calciumsignalextract: A Matlab Gui To Automatically Extract The Activity Of Multiple Cells From Calcium Imaging Data, Stephan Meyer Zum Alten Borgloh
Gilbert Laboratory
A Matlab GUI that automatically segments fluorescence image stacks into ROIs based on differential morphology and fluorescence activity of the individual cells. The time course data of each ROI gets extracted and plotted. External data from behavioral experiments and sensory stimuli can be integrated to compare for task and stimulus dependent neuronal events
Signals From The 4th Dimension: Role Of Extracellular Matrix Signaling In Synaptic Plasticity Mediating Addiction,
2015
Medical University of South Carolina
Signals From The 4th Dimension: Role Of Extracellular Matrix Signaling In Synaptic Plasticity Mediating Addiction, Alexander C. W. Smith
MUSC Theses and Dissertations
Chronic cocaine abuse causes maladaptive neuroadaptations that underlie vulnerability to relapse, even after protracted abstinence. A great deal of work has examined mechanisms of neuroplasticity by which these occur. However, the majority of experimentation has focused on intracellular signaling cascades, while the extracellular compartment has been largely ignored. In the past decade, work has emerged in the learning and memory literature that indicates that extracellular matrix remodeling and signaling is required for adaptive forms of neuroplasticity (e.g. learning and memory), although it has not been thoroughly examined in models of maladaptive neuroplasticity. Throughout this dissertation a drug self-administration, extinction and …
Familiarity Differentially Affects Right Hemisphere Contributions To Processing Metaphors And Literals,
2015
University of South Carolina - Columbia
Familiarity Differentially Affects Right Hemisphere Contributions To Processing Metaphors And Literals, V. T. Lai, Wessel Van Dam, L. L. Conant, J. R. Binder, Rutvik Desai
Faculty Publications
The role of the two hemispheres in processing metaphoric language is controversial. While some studies have reported a special role of the right hemisphere (RH) in processing metaphors, others indicate no difference in laterality relative to literal language. Some studies have found a role of the RH for novel/unfamiliar metaphors, but not conventional/familiar metaphors. It is not clear, however, whether the role of the RH is specific to metaphor novelty, or whether it reflects processing, reinterpretation or reanalysis of novel/unfamiliar language in general. Here we used functional magnetic resonance imaging (fMRI) to examine the effects of familiarity in both metaphoric …
Experimental-Computational Analysis Of Vigilance Dynamics For Applications In Sleep And Epilepsy,
2015
University of Kentucky
Experimental-Computational Analysis Of Vigilance Dynamics For Applications In Sleep And Epilepsy, Farid Yaghouby
Theses and Dissertations--Biomedical Engineering
Epilepsy is a neurological disorder characterized by recurrent seizures. Sleep problems can cooccur with epilepsy, and adversely affect seizure diagnosis and treatment. In fact, the relationship between sleep and seizures in individuals with epilepsy is a complex one. Seizures disturb sleep and sleep deprivation aggravates seizures. Antiepileptic drugs may also impair sleep quality at the cost of controlling seizures. In general, particular vigilance states may inhibit or facilitate seizure generation, and changes in vigilance state can affect the predictability of seizures. A clear understanding of sleep-seizure interactions will therefore benefit epilepsy care providers and improve quality of life in patients. …
Role Of Alpha Oscillations In Reweighting Multiple Attributes During Choice,
2015
Claremont McKenna College
Role Of Alpha Oscillations In Reweighting Multiple Attributes During Choice, Samuel I. Dunham
CMC Senior Theses
In our everyday lives, we must often weigh the different attributes of items in order to select the item that best fits our current goals, allowing us to make optimal decisions. Construal Level Theory proposes a psychological mechanism for re-weighting attributes, utilizing selective attention as the process by which we implement self-control. It has been hypothesized that switching attention between attributes is facilitated by the suppression of cortical oscillations over posterior brain regions within the alpha (8-12 Hz) frequency range. To test this idea, we re-examined previously collected whole-brain electroencephalography (EEG) data from a dietary choice experiment in which participants …
Gliopathy Of Demyelinating And Non-Demyelinating Strains Of Mouse Hepatitis Virus,
2015
Philadelphia College of Osteopathic Medicine
Gliopathy Of Demyelinating And Non-Demyelinating Strains Of Mouse Hepatitis Virus, Lawrence Charles Kenyon, Kaushiki Biswas, Kenneth Shindler, Manasi Nabar, Marjorie Stout, Susan T. Hingley, Judith B. Grinspan, Jayasri Das Sarma
PCOM Scholarly Works
Demyelination in the central nervous system induced by neurovirulent strains of Mouse Hepatitis Virus (MHV) is mediated by the viral spike glycoprotein, but it is not clear whether the mechanism of this disease pathology involves direct viral infection of oligodendrocytes. Detailed studies of glial cell tropism of MHV are presented, demonstrating that direct MHV infection of oligodendrocytes differs between demyelinating (RSA59) and non-demyelinating (RSMHV2) viral strains both in vitro and in vivo. Our results indicate that direct injury of mature oligodendrocytes is an important mechanism of virus-induced demyelination. In vivo, RSA59 infection was identified in spinal cord gray and white …
Gene Expression And Alzheimer's Disease: Evaluation Of Gene Expression Patterns In Brain And Blood For An Alzheimer's Disease Mouse Model,
2015
Liberty University
Gene Expression And Alzheimer's Disease: Evaluation Of Gene Expression Patterns In Brain And Blood For An Alzheimer's Disease Mouse Model, Amanda Hazy
Senior Honors Theses
Previous studies have established a causative role for altered gene expression in development of Alzheimer’s disease (AD). These changes can be affected by methylation and miRNA regulation. In this study, expression of miRNA known to change methylation status in AD was assessed by qPCR. Genome-wide expression changes were determined by RNA-sequencing of mRNA from hippocampus and blood of control and AD mice. The qPCR data showed significantly increased expression of Mir 17 in AD, and sequencing data revealed 230 genes in hippocampus, 58 genes in blood, and 8 overlapping genes showing significant differential expression (p value ≤ 0.05). Expression data …
Separating The Signal From The Noise In Electrocorticographic (Ecog) Signals : Novel Analytic Methods And Their Application To Experimental And Theoretical Neuroscience,
2015
University at Albany, State University of New York
Separating The Signal From The Noise In Electrocorticographic (Ecog) Signals : Novel Analytic Methods And Their Application To Experimental And Theoretical Neuroscience, William Grey Coon
Legacy Theses & Dissertations (2009 - 2024)
Measurements are comprised of two parts: signal, that is, the true quantity one wishes to measure, and noise, that is, measurement fluctuations that are unrelated to the true signal.
A Novel Method For Studying Gene Regulatory Elements In Vivo Reveals Essential Roles For Intron Splicing In Neurofilament Gene Expression,
2015
University at Albany, State University of New York
A Novel Method For Studying Gene Regulatory Elements In Vivo Reveals Essential Roles For Intron Splicing In Neurofilament Gene Expression, Chen Wang
Legacy Theses & Dissertations (2009 - 2024)
Axon outgrowth requires coordinated expression of critical cytoskeletal genes in response to extracellular cues. The spatial and temporal expression of these genes is regulated transcriptionally and posttranscriptionally. Such regulation is largely mediated through the activity of cis-regulatory elements within the cytoskeletal DNAs and RNAs, which recruit specific sets of trans-factors such as DNA- and RNA-binding proteins, as well as microRNAs. To identify the functionally active cis-elements, characterize their dynamically changing sets of trans-factors, and investigate the association between the two sets of regulators in the context of an intact developing nervous system, one needs to combine appropriate in vivo strategies …
Nosh-Aspirin (Nbs-1120), A Dual Nitric Oxide And Hydrogen Sulfide-Releasing Hybrid, Reduces Inflammatory Pain,
2015
University of São Paulo
Nosh-Aspirin (Nbs-1120), A Dual Nitric Oxide And Hydrogen Sulfide-Releasing Hybrid, Reduces Inflammatory Pain, Miriam D. Fonseca, Fernando Q. Cunha, Khosrow Kashfi, Thiago M. Cunha
Publications and Research
The development of nitric oxide (NO)- and hydrogen sulfide (H2S)-releasing nonsteroidal anti-inflammatory drugs (NSAIDs) has generated more potent anti-inflammatory drugs with increased safety profiles. A new hybrid molecule incorporating both NO and H2S donors into aspirin (NOSH-aspirin) was recently developed. In the present study, the antinociceptive activity of this novel molecule was compared with aspirin in different models of inflammatory pain. It was found that NOSH-aspirin inhibits acetic acid-induced writhing response and carrageenan (Cg)-induced inflammatory hyperalgesia in a dosedependent (5–150 lmol/kg, v.o.) manner, which was superior to the effect of the same doses of aspirin. NOSH-aspirin’s antinociceptive effect was also …
Clique Topology Reveals Intrinsic Geometric Structure In
Neural Correlations,
2015
University of Pennsylvania
Clique Topology Reveals Intrinsic Geometric Structure In Neural Correlations, Chad Giusti, Eva Pastalkova, Carina Curto, Vladimir Itskov
Department of Mathematics: Faculty Publications
Detecting meaningful structure in neural activity and connectivity data is challenging in the presence of hidden nonlinearities, where traditional eigenvalue-based methods may be misleading. We introduce a novel approach to matrix analysis, called clique topology, that extracts features of the data invariant under nonlinear monotone transformations. These features can be used to detect both random and geometric structure, and depend only on the relative ordering of matrix entries. We then analyzed the activity of pyramidal neurons in rat hippocampus, recorded while the animal was exploring a 2D environment, and confirmed that our method is able to detect geometric organization using …
Effect Of Somatostatin On Voltage-Gated Calcium
Influx In Isolated Neonatal Rat Carotid Body Type I Cells,
2015
Wright State University
Effect Of Somatostatin On Voltage-Gated Calcium Influx In Isolated Neonatal Rat Carotid Body Type I Cells, Eric J. Dunn
Browse all Theses and Dissertations
Somatostatin (SST) is a neuropeptide hormone that regulates the release of secondary hormones. Evidence suggests SST plays a neuromodulatory role due to its distribution throughout the central nervous system. Interestingly, SST has been suggested to affect the carotid body, the small peripheral chemoreceptors that regulate breathing. It has been shown that the peripheral chemoreflex sensitivity to CO2 and hypoxia is reduced by SST in humans (Pedersen et al., 1999; Pandit et al., 2014). SST has also been found to inhibit whole cell Ca2+ currents recorded from adult rat carotid body type I cells (e Silva & Lewis, 1995), but the …
An Epigenetic Hypothesis For The Genomic Memory Of Pain,
2015
Stanford University
An Epigenetic Hypothesis For The Genomic Memory Of Pain, Sebastian Alvarado, Maral Tajerian, Matthew Suderman, Ziv Machnes, Stephanie Pierfelice, Magali Millecamps, Laura S. Stone, Moshe Szyf
Publications and Research
Chronic pain is accompanied with long-term sensory, affective and cognitive disturbances. What are the mechanisms that mediate the long-term consequences of painful experiences and embed them in the genome? We hypothesize that alterations in DNA methylation, an enzymatic covalent modification of cytosine bases in DNA,serve as a “genomic” memory of pain in the adult cortex. DNA methylation is an epigenetic mechanism for long-term regulation of gene expression. Neuronal plasticity at the neuroanatomical, functional, morphological, physiological and molecular levels has been demonstrated throughout the neuroaxis in response to persistent pain, including in the adult prefrontal cortex (PFC). We have previously reported …
Reducing Subjectivity: Meditation And Implicit Bias,
2015
Claremont McKenna College
Reducing Subjectivity: Meditation And Implicit Bias, Diana M. Ciuca
CMC Senior Theses
Implicit association of racial stereotypes is brought about by social conditioning (Greenwald & Krieger, 2006). This conditioning can be explained by attractor networks (Sharp, 2011). Reducing implicit bias through meditation can show the effectiveness of reducing the rigidity of attractor networks, thereby reducing subjectivity. Mindfulness meditation has shown to reduce bias from the use of one single guided session conducted before performing an Implicit Association Test (Lueke & Gibson, 2015). Attachment to socially conditioned racial bias should become less prevalent through practicing meditation over time. An experimental model is proposed to test this claim along with a reconceptualization of consciousness …
Characterization Of Calbindin Positive Interneurons Within The Ventral Horn Of The Mouse Spinal Cord,
2015
Wright State University - Main Campus
Characterization Of Calbindin Positive Interneurons Within The Ventral Horn Of The Mouse Spinal Cord, Taylor L. Floyd, David R. Ladle
Celebration of Undergraduate & Graduate Research, Scholarship, and Creative Activities Materials
Sensory-motor circuits in the spinal cord integrate sensory feedback from muscles and modulate locomotor behavior. Although we know how the sensory-motor system generally works, the main issue lies in identifying all neurons involved and understanding their interrelationships. Many interneurons contribute to sensory-motor circuits and have been well studied. For example, Renshaw cells (RC) are inhibitory interneurons that prevent motor neurons from over-activity. A distinguishing feature of RCs is that they are the only interneurons within the ventral-most region of the spinal cord expressing the calcium binding protein calbindin (CB). Recent studies have found other subpopulations of ventral horn interneurons outside …
Neurobiology Of Stress,
2015
Smith College
Neurobiology Of Stress, Annaliese K. Beery, Daniela Kaufer
Neuroscience: Faculty Publications
The neurobiology of stress and the neurobiology of social behavior are deeply intertwined. The social environment interacts with stress on almost every front: social interactions can be potent stressors; they can buffer the response to an external stressor; and social behavior often changes in response to stressful life experience. This review explores mechanistic and behavioral links between stress, anxiety, resilience, and social behavior in rodents, with particular attention to different social contexts. We consider variation between several different rodent species and make connections to research on humans and nonhuman primates.
Feel The Noise: Relating Individual Differences In Auditory Imagery To The Structure And Function Of Sensorimotor Systems,
2015
Bucknell University
Feel The Noise: Relating Individual Differences In Auditory Imagery To The Structure And Function Of Sensorimotor Systems, Cesar F. Lima, Nadine Lavan, Samuel Evans, Zarinah Agnew, Andrea R. Halpern, Pradheep Shanmugalingam, Sophie Meekings, Dana Boebinger, Markus Ostarek, Carolyn Mcgettigan, Jane E. Warren, Sophie K. Scott
Faculty Journal Articles
Humans can generate mental auditory images of voices or songs, sometimes perceiving them almost as vividly as perceptual experiences. The functional networks supporting auditory imagery have been described, but less is known about the systems associated with interindividual differences in auditory imagery. Combining voxel-based morphometry and fMRI, we examined the structural basis of interindividual differences in how auditory images are subjectively perceived, and explored associations between auditory imagery, sensory-based processing, and visual imagery. Vividness of auditory imagery correlated with gray matter volume in the supplementary motor area (SMA), parietal cortex, medial superior frontal gyrus, and middle frontal gyrus. An analysis …
Time Frequency Analysis Of Neural Oscillations In Multi-Attribute Decision-Making,
2015
Scripps College
Time Frequency Analysis Of Neural Oscillations In Multi-Attribute Decision-Making, Iris Lieuw
Scripps Senior Theses
In our daily lives, we often make decisions that require the use of self-control, weighing trade-offs between various attributes: for example, selecting a food based on its health rather than its taste. Previous research suggests that re-weighting attributes may rely on selective attention, associated with decreased neural oscillations over posterior brain regions in the alpha (8-12 Hz) frequency range. Here, we utilized the high temporal resolution and whole-brain coverage of electroencephalography (EEG) to test this hypothesis in data collected from hungry human subjects exercising dietary self-control. Prior analysis of this data has found time-locked neural activity associated with each food’s …
Characterizing The Temporal Dynamics In Functional Connectivity Measured With Fmri,
2015
Medical University of South Carolina
Characterizing The Temporal Dynamics In Functional Connectivity Measured With Fmri, Joshua Swearingen
MUSC Theses and Dissertations
There is a considerable and growing interest in the organization and development of neural function at the scale of the entire brain, particularly from activity observed in fluctuations in the blood oxygen level dependent (BOLD) signal in functional magnetic resonance imaging (fMRI). This activity reliably organizes into sub-networks, whether obtained from subjects at rest or from those involved in various perceptual or cognitive tasks. While these networks have often been identified and studied, the precise dynamics involved in their interactions as well as the relationship between organization found in both resting and task-based activity are not well understood. Here I …
Towards Closed-Loop Deep Brain Stimulation: Behavior Recognition From Human Stn,
2015
University of Denver
Towards Closed-Loop Deep Brain Stimulation: Behavior Recognition From Human Stn, Soroush Niketeghad
Electronic Theses and Dissertations
Deep brain stimulation (DBS) provides significant therapeutic benefit for movement disorders such as Parkinson’s disease (PD). Current DBS devices lack real-time feedback (thus are open loop) and stimulation parameters are adjusted during scheduled visits with a clinician. A closed-loop DBS system may reduce power consumption and side effects by adjusting stimulation parameters based on patient’s behavior. Thus behavior detection is a major step in designing such systems. Various physiological signals can be used to recognize the behaviors. Subthalamic Nucleus (STN) Local field Potential (LFP) is a great candidate signal for the neural feedback, because it can be recorded from the …
