PMID- 18926573 OWN - NLM STAT- MEDLINE DCOM- 20090204 LR - 20081117 IS - 0165-1781 (Print) IS - 0165-1781 (Linking) VI - 161 IP - 3 DP - 2008 Dec 15 TI - Reduced auditory evoked potential component N100 in schizophrenia--a critical review. PG - 259-74 LID - 10.1016/j.psychres.2008.03.017 [doi] AB - The role of a reduced N100 (or N1) component of the auditory event related potential as a potential trait marker of schizophrenia is critically discussed in this review. We suggest that the extent of the N100 amplitude reduction in schizophrenia depends on experimental and subject factors, as well as on clinical variables: N100 is more consistently reduced in studies using interstimulus intervals (ISIs) >1 s than in studies using shorter ISIs. An increase of the N100 amplitude by allocation of attention is often lacking in schizophrenia patients. A reduction of the N100 amplitude is nevertheless also observed when such an allocation is not required, proposing that both endogenous and exogenous constituents of the N100 are affected by schizophrenia. N100 is more consistently reduced in medicated than unmedicated patients, but a reduction of the N100 amplitude as a consequence of antipsychotic medication was shown in only two of seven studies. In line with that, the association between the N100 reduction and degree of psychopathology of patients appears to be weak overall. A reduced N100 amplitude is found in first degree relatives of schizophrenia patients, but the risk of developing schizophrenia is not reflected in the N100 amplitude reduction. FAU - Rosburg, Timm AU - Rosburg T AD - Department of Epileptology, University of Bonn, Bonn, Germany. timm.rosburg@ukb.uni-bonn.de FAU - Boutros, Nash N AU - Boutros NN FAU - Ford, Judith M AU - Ford JM LA - eng GR - R01 MH063476/MH/NIMH NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Review DEP - 20081015 PL - Ireland TA - Psychiatry Res JT - Psychiatry research JID - 7911385 RN - 0 (Antipsychotic Agents) SB - IM MH - Acoustic Stimulation MH - Antipsychotic Agents/therapeutic use MH - Attention/drug effects/physiology MH - Auditory Perception/drug effects/physiology MH - Brain Mapping MH - Cerebral Cortex/physiopathology MH - Electroencephalography MH - Evoked Potentials, Auditory/drug effects/genetics/*physiology MH - Genetic Predisposition to Disease/genetics MH - Humans MH - Nerve Net/physiopathology MH - Schizophrenia/diagnosis/drug therapy/genetics/*physiopathology MH - Signal Processing, Computer-Assisted RF - 130 EDAT- 2008/10/18 09:00 MHDA- 2009/02/05 09:00 CRDT- 2008/10/18 09:00 PHST- 2007/01/29 00:00 [received] PHST- 2007/09/10 00:00 [revised] PHST- 2008/03/14 00:00 [accepted] PHST- 2008/10/18 09:00 [pubmed] PHST- 2009/02/05 09:00 [medline] PHST- 2008/10/18 09:00 [entrez] AID - S0165-1781(08)00078-4 [pii] AID - 10.1016/j.psychres.2008.03.017 [doi] PST - ppublish SO - Psychiatry Res. 2008 Dec 15;161(3):259-74. doi: 10.1016/j.psychres.2008.03.017. Epub 2008 Oct 15.