JN AJP: Endocrinology and Metabolism
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
 QUICK SEARCH:   [advanced]


     


J Neurophysiol (February 20, 2008). doi:10.1152/jn.00870.2007
This Article
Right arrow Full Text (PDF)
Right arrow All Versions of this Article:
99/5/2656    most recent
00870.2007v1
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Vierling-Claassen, D.
Right arrow Articles by Kopell, N. J
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Vierling-Claassen, D.
Right arrow Articles by Kopell, N. J
Submitted on August 6, 2007
Accepted on February 20, 2008

Modeling GABA alterations in schizophrenia: a link between impaired inhibition and altered gamma and beta range auditory entrainment

Dorea Vierling-Claassen1*, Peter Siekmeier2, Steven Stufflebeam3, and Nancy J Kopell4

1 Mathematics and Statistics, Center for BioDynamics, Boston University, Boston, Massachusetts, United States; Radiology, MGH-MIT-HMS Martinos Center for Biomedical Imaging, Charlestown, Massachusetts, United States
2 Psychiatry, McLean Hospital, Harvard Medical School, Belmont, Massachusetts, United States
3 Radiology, MGH-MIT-HMS Martinos Center for Biomedical Imaging, Charlestown, Massachusetts, United States
4 Mathematics and Statistics, Center for BioDynamics, Boston University, Boston, Massachusetts, United States

* To whom correspondence should be addressed. E-mail: dorea{at}math.bu.edu.

The disorganized symptoms of schizophrenia, including severely disordered thought patterns, may be indicative of a problem with the construction and maintenance of cell assemblies during sensory processing and attention. The gamma and beta frequency bands (15 to 70 Hz) are believed relevant to such processing. This paper addresses the results of an experimental examination of the cortical response of 12 schizophrenia patients and 12 control subjects when presented with auditory click-train stimuli in the gamma/beta frequency band during measurement using Magnetoencephalography (MEG), as well as earlier work by Kwon et al. (1999). These data indicate that control subjects show an increased 40 Hz response to both 20 and 40 Hz stimulation as compared to patients, while schizophrenic subjects show a preference for 20 Hz response to the same driving frequencies. In this work, two computational models of the auditory cortex are constructed based on post-mortem studies that indicate cortical interneurons in schizophrenic subjects have decreased GAT-1 (a GABA transporter) and GAD67 (one of two enzymes responsible for GABA synthesis ). The models transition from control to schizophrenic frequency response when an extended inhibitory decay time is introduced; this change captures a possible effect of these GABA alterations. Modeling gamma/beta range auditory entrainment in schizophrenia provides insight into how biophysical mechanisms can impact cognitive function. In addition, the study of dynamics that underlie auditory entrainment in schizophrenia may contribute to the understanding of how gamma and beta rhythms impact cognition in general.







HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
Visit Other APS Journals Online
Copyright © 2008 by the The American Physiological Society.