Inhibitory processing in visuospatial attention in healthy adults and schizophrenic patients.

Abstract:

:This study assessed visuospatial attention in healthy adults and medicated schizophrenic patients. Participants performed a visual orientation task in which a peripheral cue was followed. at different intervals, by a target presented either at valid or invalid locations. When the long stimulus onset asynchrony (SOA) was used, participants were presented with either a single peripheral cue (single-cue condition) or two cues, the peripheral cue followed by a central cue (the double-cue condition). Healthy adults showed marginal facilitation effects with the short SOA and similar inhibition of return effects with the long SOA in both single-cue and double-cue conditions. Schizophrenic individuals showed a big facilitation effect with the short SOA and normal inhibition of return with the long SOA in both cue conditions. Results with the short SOA replicated previous findings (Huey, E.D., Wexler, B.E., 1994. Schizophrenia Research 14, 57-63) but, in contrast, we did not observe blunted inhibition of return with the long SOA. An inspection of the differences in the procedures used in both studies may help both to account for the discrepancies and to reveal what processes involved in visuospatial attention are affected in schizophrenia.

journal_name

Schizophr Res

journal_title

Schizophrenia research

authors

Fuentes LJ,Boucart M,Alvarez R,Vivas AB,Zimmerman MA

doi

10.1016/s0920-9964(99)00044-4

subject

Has Abstract

pub_date

1999-11-09 00:00:00

pages

75-80

issue

1

eissn

0920-9964

issn

1573-2509

pii

S0920-9964(99)00044-4

journal_volume

40

pub_type

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