Document Detail

Sensory gating and sensorimotor gating in medication-free obsessive-compulsive disorder patients.
MedLine Citation:
PMID:  20568657     Owner:  NLM     Status:  MEDLINE    
Obsessive-compulsive disorder (OCD) is associated with deficits in inhibition mechanisms. This is reflected in reports showing impaired sensorimotor and sensory gating in OCD patients, as measured with prepulse inhibition (PPI) of the startle reflex and P50 suppression paradigms. However, most of the patients in these studies used medication and the results were not controlled for menstrual cycle phase in women. In this study PPI and P50 suppression were tested in 25 medication-free OCD patients and 25 healthy controls, using auditory stimuli and controlling for menstrual cycle effects. Subgroups were established, based on clinical variables (e.g. 'washers' and 'checkers'). No impairments in PPI or P50 suppression were found in the OCD group when compared with healthy controls. However, a subgroup of OCD patients ('checkers', n=12) showed increased P50 suppression. It was concluded that sensorimotor and sensory gating is not impaired in drug-free OCD patients, taking into account the menstrual cycle effects in women. These results do not support hypotheses linking deficits in these inhibition paradigms and the pathogenesis of OCD. The finding of an increased P50 suppression in the subgroup of 'checkers' deserves further investigation and underlines the value of studying subgroups of OCD.
Aart S de Leeuw; Bob Oranje; Harold J G M van Megen; Chantal Kemner; Herman G M Westenberg
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  International clinical psychopharmacology     Volume:  25     ISSN:  1473-5857     ISO Abbreviation:  Int Clin Psychopharmacol     Publication Date:  2010 Jul 
Date Detail:
Created Date:  2010-06-22     Completed Date:  2011-01-31     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8609061     Medline TA:  Int Clin Psychopharmacol     Country:  England    
Other Details:
Languages:  eng     Pagination:  232-40     Citation Subset:  IM    
Department of Psychiatry, Rudolf Magnus Institute for Neuroscience, University Medical Center Utrecht.
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MeSH Terms
Acoustic Stimulation
Case-Control Studies
Menstrual Cycle
Obsessive-Compulsive Disorder / diagnosis,  physiopathology*
Psychiatric Status Rating Scales
Sensory Gating / physiology*
Sex Characteristics
Young Adult

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