Medicine and Health Sciences Commons^™

Septohippocampal Gabaergic Neurons Mediate The Altered Behaviors Induced By N-Methyl-D-Aspartate Receptor Antagonists., Jingyi Ma, Siew Kian Tai, L Stan Leung

Physiology and Pharmacology Publications

We hypothesize that selective lesion of the septohippocampal GABAergic neurons suppresses the altered behaviors induced by an N-methyl-D-aspartate (NMDA) receptor antagonist, ketamine or MK-801. In addition, we hypothesize that septohippocampal GABAergic neurons generate an atropine-resistant theta rhythm that coexists with an atropine-sensitive theta rhythm in the hippocampus. Infusion of orexin-saporin (ore-SAP) into the medial septal area decreased parvalbumin-immunoreactive (GABAergic) neurons by ~80%, without significantly affecting choline-acetyltransferase-immunoreactive (cholinergic) neurons. The theta rhythm during walking, or the immobility-associated theta induced by pilocarpine, was not different between ore-SAP and sham-lesion rats. Walking theta was, however, more disrupted by atropine sulfate in ore-SAP than …

Examining The Association Between Psychiatric Illness And Suicidal Ideation In A Sample Of Treatment-Seeking Canadian Peacekeeping And Combat Veterans With Posttraumatic Stress Disorder, Don Richardson, Kate St. Cyr, Alexandra M. Mcintyre-Smith, David Haslam, Jon D. Elhai, Jitender Sareen

MacDonald Franklin OSI Research Centre

Objective:

Our study examines the association between suicidal ideation and and self-reported symptoms of posttraumatic stress disorder (PTSD), major depressive disorder (MDD), generalized anxiety disorder (GAD), and alcohol use disorder (AUD) in a sample of treatment-seeking Canadian combat and peacekeeping veterans; and identifies potential predictors of suicidal ideation.

Methods:

Actively serving Canadian Forces and Royal Canadian Mounted Police members and veterans seeking treatment at the Parkwood Hospital Operational Stress Injury Clinic (n = 250) completed measures including the Primary Care Evaluation of Mental Disorders Patient Health Questionnaire, the Alcohol Use Disorder Identification Test, and the PTSD Checklist—Military Version (PCL-M) …

Psychosis In Indigenous Populations Of Cape York And The Torres Strait, Ernest M. Hunter, Bruce D. Gynther, Carrick J. Anderson, Leigh-Ann L. Onnis, Jeffrey R. Nelson, Wayne Hall, Bernhard T. Baune, Aaron R. Groves

Aboriginal Policy Research Consortium International (APRCi)

Objective: To describe and characterise treated psychotic disorders in the Indigenous populations of Cape York and the Torres Strait.

Design: Cross-sectional analysis of patients with a psychotic disorder identified by treating psychiatrists.

Setting and participants: Indigenous patients aged 􏰀 15 years in Cape York and Torres Strait communities receiving treatment for a psychotic disorder over 3 months in 2010.

Main outcome measures: Prevalence of psychosis diagnoses, intellectual disability, and substance use comorbidities.

Results: 171 patients were included. The prevalence rate in this population was 1.68%, higher for males (2.60%) than females (0.89%), and twice as high in the Aboriginal (2.05%) …