Neurosciences Commons^™

Effects Of Postural Position, Eeg Asymmetry, And Temperamental Style On Cognitive Task Performance, Taylor Cops, Christy D. Wolfe

Undergraduate Theses

The literature shows hemispheric asymmetry in individuals corresponding with temperamental style. Those with greater right-frontal activation tend towards withdrawal/inhibition and those with greater left-frontal activation tend towards approach/activation (e.g., Davidson, 1992). Other literature suggests that greater right-parietotemporal activation is associated with increased arousal (Heller, 1993; Wolfe & Bell, 2014). Temperamental style has been linked with cognitive performance with approach-oriented temperaments being associated with both higher and lower performance depending on the task requirements (Khan et al., 2024; Wolfe & Bell, 2007). Literature further suggests that postural position (e.g., sitting, standing, lying down) may influence feelings of approach/withdrawal and cognitive processing. …

Gamma-Aminobutyric Acid (Gaba) Neurons And Perineuronal Nets (Pnn) In The Monodelphis Domestica And Relevance To Psychiatric Disorders, Jatziry Z. Luna Escobedo, Mariela Garcia, John L. Vandeberg, Mario Gil

Research Symposium

Background/ Purpose: Gamma-aminobutyric acid (GABA) is an amino acid that serves as the central nervous system’s (CNS) main inhibitory neurotransmitter. By inhibiting nerve transmission, it works to lower neuronal excitability. Altered GABA levels have been associated with a variety of psychiatric disorders, for example Epilepsies, Parkinson’s Disease, and Schizophrenia. Perineuronal nets (PNN) are extracellular molecules that are released by neurons and glial cells that modulate many neuronal and glial functions by encapsulating the inhibitory cells and neurites. Altered PNN levels serve as a potential trigger to synaptic imbalance. The purpose of this study is to quantify and analyze the presence, …

Validation Of A Virtual Auditory Space, And Its Use To Investigate How Pitch And Spatial Cues Contribute To Perceptual Segregation Of Auditory Streams, Nima Zargarnezhad

Electronic Thesis and Dissertation Repository

The human auditory system can decompose complex sound mixtures into distinct perceptual auditory objects through a process (or processes) known as Auditory Scene Analysis. Pitch and spatial cues are among the sound attributes known to influence sequential streaming (Plack 2018). In this project, the fidelity of a virtual acoustic space (the Audio Dome) in reproducing precisely located sound sources with a 9^th-order ambisonics algorithm was validated. The estimated horizontal Minimum Audible Angles aligned with previously reported values (Mills 1958) homogeneously across the space, and a robust low-frequency presentation was identified. Then, the Audio Dome was utilized to test …

Neuropsychiatric Symptoms Of Dementia In Those With And Without A Recorded History Of Psychological Trauma: A Comparative Study From An Australian Dementia Support Service, Monica Cations, Mustafa Atee, Thomas Morris, Daniel Whiting

Research outputs 2022 to 2026

Objective: To compare the number and severity of neuropsychiatric symptoms (NPS) and associated caregiver distress between those with and without a noted history of psychological trauma among those referred to a specialised national dementia NPS support service. Methods: This was a 5-year retrospective observational study of records from the Dementia Support Australia NPS support service. NPS were reported by formal or informal caregivers at service entry using the Neuropsychiatric Inventory Nursing Home version or Questionnaire version. A history of psychological trauma was recorded in the person's social or medical history and/or endorsed as a contributor to NPS by a trained …

Changes In Sleep Effort Mediate Insomnia Severity In Older Adults Following Online Cognitive Behavioural Therapy, Yvonne Kutzer, Lisa Whitehead, Eimear Quigley, Mandy Stanley

Research outputs 2022 to 2026

Background

To examine treatment mechanisms of digitally delivered cognitive behavioural therapy for insomnia (CBT-I), this study assessed the mediating effects of dysfunctional beliefs, hyperarousal, locus of control, self-efficacy, sleep effort, and safety behaviours on self-reported insomnia severity in older adults before and following the completion of a self-guided, online CBT-I program.

Methods

The baseline and follow-up measurements were completed by 62 older adults (55 female, 89%). This was a two-condition within-participant design. Mediation analysis using a parallel mediation model was conducted using the MEMORE macro for repeated measure designs.

Results

Out of all the included mediator variables, only a reduction …