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Titolo:
Parallel and serial search in two teenagers with lesions of the mesial parietal cortex
Autore:
Karatekin, C; Lazareff, JA; Asarnow, RF;
Indirizzi:
Univ Minnesota, Inst Child Dev, Minneapolis, MN 55455 USA Univ Minnesota Minneapolis MN USA 55455 ld Dev, Minneapolis, MN 55455 USA Univ Calif Los Angeles, Sch Med, Dept Neurosurg, Los Angeles, CA 90024 USAUniv Calif Los Angeles Los Angeles CA USA 90024 Los Angeles, CA 90024 USA Univ Calif Los Angeles, Neuropsychiat Inst & Hosp, Dept Psychiat, Los Angeles, CA 90024 USA Univ Calif Los Angeles Los Angeles CA USA 90024 Los Angeles, CA 90024 USA
Titolo Testata:
NEUROPSYCHOLOGIA
fascicolo: 13, volume: 37, anno: 1999,
pagine: 1461 - 1468
SICI:
0028-3932(199912)37:13<1461:PASSIT>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
UNILATERAL VISUAL NEGLECT; EXTRASTRIATE AREA V4; ATTENTION; CONJUNCTION; INTEGRATION; SIMILARITY; SALIENCE; FEATURES; SHIFTS; VISION;
Keywords:
visual-spatial attention; hemispheric differences;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Life Sciences
Citazioni:
45
Recensione:
Indirizzi per estratti:
Indirizzo: Karatekin, C Univ Minnesota, Inst Child Dev, 51 E River Rd, Minneapolis, MN 55455 USA Univ Minnesota 51 E River Rd Minneapolis MN USA 55455 455 USA
Citazione:
C. Karatekin et al., "Parallel and serial search in two teenagers with lesions of the mesial parietal cortex", NEUROPSYCHO, 37(13), 1999, pp. 1461-1468

Abstract

Visual-spatial attention was examined in two 14-year-olds who had undergone occipital-parietal craniotomies for removal of mesial parietal tumors, one in the right and one in the left hemisphere, Neither patient showed clinically significant visual neglect. They were administered two visual search tasks from Treisman and Souther [43] that make significantly different demands on visual-spatial attention. In feature-present (parallel) search, theysearched for the presence of a feature. In feature-absent (serial) search,they searched for its absence. Search rate was estimated from the slope ofthe function relating display size to response time. Both patients had flat slopes in feature-present search to target-present (TP) displays, indicating that they could conduct parallel search at the same rate as controls. Although the patient with the right-hemisphere lesion also had a Aat slope to target-absent (TA) displays, the patient with the left-hemisphere lesion had a steep slope (30 ms/item) in this condition. In feature-absent search,the patients had equally slow search rates compared to controls, suggesting that the mesial parietal cortex is part of the network that mediates serial shifts of attention. Results support the distinction between detection of the target in parallel vs serial search and suggest that processes involved in TP and TA trials in parallel search are also dissociable. (C) 1999 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 06/04/20 alle ore 19:48:54