Publications by authors named "Elizabeth Streicker"

2 Publications

  • Page 1 of 1

Psychiatric consequences of actual versus feared and perceived bed bug infestations: a case series examining a current epidemic.

Psychosomatics 2012 Jan-Feb;53(1):85-91

Department of Psychiatry, New York University School of Medicine, New York, NY 10016, USA.

View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.psym.2011.08.001DOI Listing
April 2012

Limbic response to psychosocial stress in schizotypy: a functional magnetic resonance imaging study.

Schizophr Res 2011 Sep 25;131(1-3):184-91. Epub 2011 Jun 25.

McConnell Brain Imaging Center, Montreal Neurological Institute, McGill University, Montreal, Canada.

Psychological stress causes dopamine release in the striatum and is thought to play a role in susceptibility to psychotic illness. Previous work suggests that an elevated dopaminergic response to stress may index vulnerability to psychosis in certain individuals. With functional magnetic resonance imaging, we measured stress-induced changes in brain activity in healthy individuals at elevated risk of developing psychosis. Participants were 15 controls and 25 psychometric schizotypes: 12 with positive symptom schizotypy (perceptual aberrations) and 13 with negative symptom schizotypy (physical anhedonia), as determined by questionnaires (Chapman et al., 1976; Chapman and Chapman, 1978). In the scanner, participants performed the Montreal Imaging Stress Task and a matched sensory-motor control task. Measures of self-reported stress and salivary cortisol levels were taken throughout the experiment. All three groups showed significant increases in self-reported stress and significant fMRI signal change in the striatal, limbic and cortical regions. However, the Physical Anhedonia group showed greater stress-induced striatal and limbic deactivation than the other two groups. Deactivation in the striatum was significantly correlated with Physical Anhedonia score across all subjects. Our findings suggest the presence of abnormalities in striatal response to stress in negative symptom schizotypy.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.schres.2011.05.016DOI Listing
September 2011