Medicine and Health Sciences Commons^™

Neuronal Correlates For Neuroendocrine Habituation To Repeated Stress, Sara Matovic

Electronic Thesis and Dissertation Repository

One way that the body actively responds to an impending stressor is by increasing systemic glucocorticoids through the activation of the hypothalamic-pituitary-adrenal (HPA) axis. While it is essential for short-term adaptation to stress, the sustained activation of the HPA axis during chronic stress can be detrimental and is linked to stress-related psychiatric conditions such as anxiety and depression. Therefore, it is important that the HPA axis adapts, or habituates, during chronic stress to minimize the negative consequences. Corticotropin releasing hormone (CRH) neurons in the paraventricular nucleus of the hypothalamus (PVN) function to assimilate incoming information from the stress circuitry and …

The Effect Of The Dopamine Agonist Pramipexole On Measures Of Impulsivity In Young, Healthy Participants, Daniel Glizer

Electronic Thesis and Dissertation Repository

Patients with Parkinson disease are prescribed dopamine agonists such as pramipexole to improve motor symptoms. Several studies have found that patients taking dopaminergic medication develop impulse control disorders. In contrast, other studies suggest that some behaviors become less impulsive with pramipexole. We evaluated the performance of 20 young, healthy participants who received pramipexole (0.5 mg) and 20 participants who received placebo, on the Go/No-Go, the Stop Signal Task, and the Balloon Analogue Risk Task. We found that the pramipexole group had more timed out Go trials on the Go/No-Go task than the placebo group, suggesting reduced motor impulsivity. There were …

Amelioration Of Prenatal Alcohol Effects By Environmental Enrichment In A Mouse Model Of Fasd, Aniruddho Chokroborty-Hoque

Electronic Thesis and Dissertation Repository

Maternal alcohol consumption during pregnancy results in a spectrum of behavioural and cognitive deficits collectively known as Fetal Alcohol Spectrum Disorders (FASD). Currently, little is know about if and how the external environment may modulate these deficits. I have used C57BL/6 mice to study this interaction between prenatal alcohol exposure and the postnatal environment. Alcohol exposure during synaptogenesis produces high levels of anxiety-like traits and decreased memory performance. Alcohol-exposed mice (and matched unexposed controls) were put in 'environmentally-enriched' conditions of voluntary exercise, physical activities and cognitive stimulation to ascertain the effects of a positive postnatal environment. The results show that …

Neurocircuits Of Posttraumatic Stress Disorder And Its Dissociative Subtype, Andrew A. Nicholson

Electronic Thesis and Dissertation Repository

The amygdala and insula are highly implicated in the pathophysiology of posttraumatic stress disorder (PTSD), where both have been shown to be hyper/hypoactive in PTSD and dissociative subtype (PTSD+DS) PTSD patients, respectively, during symptom provocation. However, the functional connectivity of individual amygdala and insula subregions have not previously been compared in PTSD, PTSD+DS and healthy controls. In two separate studies, we examined amygdala complex (chapter 2) and insula subregion (chapter 3) functional connectivity patterns using resting-state fMRI. Patients with PTSD and PTSD+DS were found to display unique amygdala complex functional connectivity patterns to prefrontal cortex (PFC) regions involved in emotion …

A National Perspective On Childhood Obesity Medical Education: Do Medical Students In Canada Perceive That They Are Prepared To Treat Children With Obesity?, Dr. Dalia Hasan

Electronic Thesis and Dissertation Repository

The purposes of this survey-based, mixed-methods study were to investigate medical students’ perceptions of: (1) the overall level of medical school training acquired in relation to childhood obesity treatment; (2) the medical school training acquired in relation to specific competencies associated with the treatment of children with obesity and their caregiver(s); and (3) additional training needed. Results showed that of the 507 students who provided complete data, approximately 60% (n = 303) disagreed or strongly disagreed that their medical training related to childhood obesity was adequate. With regard to specific competencies and additional training needed, quantitative and qualitative data revealed …

Links Between Physical And Mental Health: Assessment Of Therapeutic Riding’S Effect On Children With Special Needs, Sabah I. Hasan

Brescia Psychology Undergraduate Honours Theses

This observational study examined the effect of therapeutic riding (TR) on four domains, physical skills, positive values, social skills, and self-identity in children with special needs. Participants were recruited from SARI Therapeutic Riding and were divided, based on observation, into more or less severe diagnosis categories. It was predicted that children with less severe diagnosis would show more of an increase on the four domains, especially physical skills due to TR. Participants were observed using an observational checklist at pre- and post-riding lessons. Results showed non-significant differences in all four domains, however, there was a tendency for scores to increase …

Parental Quality Of Life 10 Years After Their Child’S Epilepsy Diagnosis, Klajdi Puka, Kathy Nixon Speechley

Western Research Forum

Background: Although the long-term course of childhood epilepsy is favorable in terms of seizure control, patients often face debilitating cognitive and psychosocial deficits that persist even after seizure remission. Pediatric epilepsy also has a large impact on the family and has been shown to be associated with diminished quality of life (QOL) among parents. However, the long-term outcome of parental QOL is unknown. This study aimed to 1) evaluate parental QOL 10 years after their child was diagnosed with epilepsy and 2) identify epilepsy-, child- and family-related characteristics associated with diminished parental QOL.

Methods: Data were derived …