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Clinical correlates of word recognition memory in obsessive-compulsive disorder: an event-related potential study.

Abstract：

:Memory disturbances found in obsessive-compulsive disorder (OCD) may partially be related to dysfunction of cortico-subcortical circuits. However, it is still unknown how OCD symptomatology is related to memory processing. To explore this question, event-related potentials (ERPs) were recorded in a continuous word-recognition paradigm in OCD patients with either severe or moderate scores on the Yale-Brown Obsessive-Compulsive Scale (Y-BOCS) (group S and group M, n=8 each) and in normal healthy controls (n=16). Typically ERPs to repeated items are characterized by more positive waveforms beginning approximately 250 ms post-stimulus. This "old/new effect" has been shown to be relevant for memory processing. The early old/new effect (ca. 300-500 ms) with a frontal distribution is proposed to be a neural correlate of familiarity-based recognition. The late old/new effect (post-500 ms) is assumed to reflect conscious memory retrieval processes. The OCD group S showed a normal early old/new effect and a reduced late old/new effect compared with group M and the control group, but no difference was found between group M and the control group. Source analyses for the late old/new effect showed statistically reduced cerebral activation in the anterior cingulate for OCD group S in contrast to the control group. Additionally, the early old/new effect in OCD group S was negatively correlated with the Y-BOCS total scores, and the late old/new effect was negatively correlated with obsession sub-scores. The severely, not moderately, ill OCD patients showed an impaired conscious recollection of the word-to-be-remembered, which suggested an impairment of working memory capacity in these patients due to a dysfunction in the frontal and cingulate cortex.

journal_name

Psychiatry Res

journal_title

Psychiatry research

authors

Zhang Y,Feutl S,Hauser U,Richter-Witte C,Schmorl P,Emrich HM,Dietrich DE

doi

10.1016/j.pscychresns.2007.04.009

subject

Has Abstract

pub_date

2008-04-15 00:00:00

pages

262-72

issue

eissn

0165-1781

issn

1872-7123

pii

S0925-4927(07)00089-3

journal_volume

162

pub_type

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Clinical correlates of word recognition memory in obsessive-compulsive disorder: an event-related potential study.