Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 25 for “"Cortical Activation"”.
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The Process-Reactive Dimension of Schizophrenia in Relation to Cortical Activation and Arousal
Made available in DSpace on 2014-12-03T23:51:16Z (GMT). No. of bitstreams: 1 6200609.pdf: 6232456 bytes, checksum: bd189ad0fb4c00a3ce34ab96249e9b40 (MD5) Previous issue date: 1961
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Baseline cortical activation to food pictures associated with change in weight, hunger, cognitive restraint, and disinhibition following bariatric surgery
… may reveal particular patterns of brain activation, which could indicate successful outcomes in weight and other behavioral outcomes following bariatric surgery. The aim of the present study was to determine if activation to food images during a baseline fMRI food motivation paradigm is …
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Investigation of differences in cortical activation during wrist flexion and extension performed under real, passive and motor imagined paradigms
… flexion and extension may play a role in the cortical difference detected between flexion and extension, resulting in higher cortical activation for extension. However, it is still unclear as to what roles these pathways play, and to what degree other factors (muscle force activation, sensory …
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The Effects of Memory Retrieval Conflict on the Construction of a Deception
… (regardless of lie or truth) showed stronger activation in the dorsal prefrontal cortex, while deceptive responses to consistent items showed stronger activation in the ventral prefrontal cortex. These results indicate that cortical activation patterns were stronger for source identification …
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Low- and high-level motion deficits in amblyopia: studies of maximum motion displacement
… MRI results revealed decreased extrastriate cortical activation in both the strabismic and anisometropic groups relative to the control group when either eye viewed the RDK stimulus, although the lack of cortical activation was greatest for strabismic amblyopia. Taken together, this evidence …
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Understanding the Effects of Physical Activity on Executive Functioning and Psycho-Emotional Well-Being in Children with ADHD
… assessments to measure changes in prefrontal cortical activation. We found that 10mins of physical activity promoted greater inhibitory control, positive mood, and general self-efficacy compared to control. These findings suggest that a short bout of physical activity has the potential to …
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Social cognition in South African children with Fetal Alcohol Spectrum Disorders
… to identify possible differences in neuronal activation, which I investigated in Study III. Analyses of these fMRI data on 64 children aged 9 -14 years showed that participants performed well on the relatively simple affective appraisal task. However, greater cortical activation was shown in …
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A MEG investigation of lexical access in aphasia
… The present study examined spreading lexical activation in people with aphasia by implementing thorough clinical evaluation, a series of listening tasks, and a time sensitive means of tracking cortical activation. Magnetoencephalography (MEG) was used to measure the cortical activity of 7 …
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Movement velocity effect on cortical reorganization and finger function in stroke.
… known. Studies in primates have shown that motor cortical neurons are coded for velocity of limb movement. Studies in healthy humans have shown a relationship between velocity of limb movement and cortical activation. Thus, we hypothesize that higher-velocity finger movement training will be …
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Mapping inter-subject and inter-regional brain connectivity during free viewing of novel natural scenes
… finger tapping to isolate function in distinct cortical. Recent studies have examined the mechanisms involved during natural conditions by asking subjects to freely view the presentation of a movie. The objective of our study was to further observe the extent to which similarities are present …
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Brain activation following constraint-induced movement therapy using functional near infrared spectroscopy in stroke patients
… and de-oxygenated hemoglobin concentration in cortical tissue (Nishimura, Rapoport, Wubbels, Downs, & Downs, 2010). Research employing imaging technology to investigate functional and neurological recovery following brain injury is essential in understanding the implication of various …
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An Electrophysiological Examination of Visuomotor Activity Elicited by Visual Object Affordances
… as object affordance yields rapid and concurrent activation of visual and motor brain areas, but has rarely provided direct evidence for this proposition. This thesis examines some of the key claims from the affordance literature by applying electrophysiological measures to well established SRC …
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Training-Induced Changes in Dual -Task fMRI Activation in Young and Old Adults
… adults with the goal to discriminate between cortical regions involved in preparing to make more than one response from those involved in the management and execution of two tasks. To assess this, we employed a blocked event-related functional magnetic resonance imaging (fMRI) design. We found …
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Network Dynamics of Visual Object Recognition
… transient interactions between the disseminated cortical substrates within category-specific networks. Employing novel techniques for the topologically accurate and statistically robust analysis of grouped icEEG, we found that category-selective regions were spatially arranged with respect to …
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Behavioral Strategies and Neural Mechanisms of Dynamic Foraging
… for behavioral and neural dissection of cortical contributions to dynamic foraging behavior. By a combination of state-space behavioral modeling, large-scale widefield and single-cell imaging technologies, together with encoding models of neural responses, we showed and quantified the …
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A Neurophysiological Investigation of Listening Effort in Normal Hearing Adults Using fNIRS and Pupillometry
… pupillometry can be used to characterize the cortical response, such that changes in pupil size would be associated with neural activation that directly relates to effortful processing. The primary goal of this study was to investigate the physiological mechanisms underlying recognition of …
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Median and Ulnar Nerve Injuries in Children and Adolescents- Long-term outcome and Cerebral reorganisation
… Imaging (fMRI) showed that the cerebral activation pattern after tactile stimulation of the injured hand was different compared to the pattern of the healthy hand. In a larger study, the long-term functional outcome after nerve repair in those injured in childhood was compared to the …
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Origins of empathy development in infancy
… and a peer crying, with greater right frontal activation being associated with the observation of a peer crying. Furthermore, correlational analysis suggested a positive relation between left frontal cortical activation and infants’ attempts to approach a peer crying or infants’ attempts to …
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Lifestyle factors and neuroimaging metrics as predictors of cognitive performance in healthy aging
… essential role of the arousal system (ARAS) in cortical activation and previous findings of disrupted ARAS functioning with age, I investigated the hypothesis that age-related changes in ARAS-cortical functional connectivity may contribute to commonly observed age-related differences in cortical …
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Implantation und Explantation von inaktiven, epiretinal fixierten Retina Implant Systemen am Minipig
… complete intraocular implantation and wireless activation to receive and deliver electric signals. In the course of the development of this system the tolerability of the used materials inside the eye, feasibility of reversible epiretinal fixation via retinal tacks, the viability of implantation …
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