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Titolo:
Bilateral field advantage and evoked potential interhemispheric transmission in commissurotomy and callosal agenesis
Autore:
Brown, WS; Jeeves, MA; Dietrich, R; Burnison, DS;
Indirizzi:
Fuller Grad Sch Psychol, Travis Inst Biopsychosocial Res, Pasadena, CA USAFuller Grad Sch Psychol Pasadena CA USA ychosocial Res, Pasadena, CA USA Univ Calif Los Angeles, Brain Res Inst, Dept Psychiat & Biobehav Sci, Los Angeles, CA 90024 USA Univ Calif Los Angeles Los Angeles CA USA 90024 Los Angeles, CA 90024 USA Univ St Andrews, Dept Psychol, St Andrews, Fife, Scotland Univ St AndrewsSt Andrews Fife Scotland hol, St Andrews, Fife, Scotland Univ Calif Irvine, Dept Neuroradiol, Irvine, CA 92717 USA Univ Calif Irvine Irvine CA USA 92717 t Neuroradiol, Irvine, CA 92717 USA
Titolo Testata:
NEUROPSYCHOLOGIA
fascicolo: 10, volume: 37, anno: 1999,
pagine: 1165 - 1180
SICI:
0028-3932(199909)37:10<1165:BFAAEP>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
CORPUS-CALLOSUM; CEREBRAL HEMISPHERES; TRANSFER TIME; ANTERIOR COMMISSURE; LATERALIZED STIMULI; SPLIT BRAIN; INTEGRATION; TASK; ABSENCE; SECTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Life Sciences
Citazioni:
80
Recensione:
Indirizzi per estratti:
Indirizzo: Brown, WS Fuller Grad Sch Psychol, Travis Inst Biopsychosocial Res, Pasadena, CA USA Fuller Grad Sch Psychol Pasadena CA USA Res, Pasadena, CA USA
Citazione:
W.S. Brown et al., "Bilateral field advantage and evoked potential interhemispheric transmission in commissurotomy and callosal agenesis", NEUROPSYCHO, 37(10), 1999, pp. 1165-1180

Abstract

The role of the corpus callosum Versus other cerebral commissures in the interhemispheric integration of Visual information was studied in four individuals with complete agenesis of the corpus callosum, two individuals with partial agenesis, one total commissurotomy patient, and normal individuals. Evoked potential (EP) indices of interhemispheric transmission of Visual sensory responses were observed during matching of unilateral and bilateral Visual field letters and patterns. Neither the commissurotomy nor any of the acallosal patients had ipsilateral hemisphere visual EPs (P1 and N1), demonstrating that the posterior callosum is necessary for interhemispheric transmission of these components of visual evoked potentials. While the commissurotomy patient could not compare bilaterally presented letters, the anterior commissure of the acallosal patients appeared to be sufficient for interhemispheric comparison of single letters. However, bilateral comparison of more complex visual patterns resulted in considerable difficulty for complete agenesis patients, while comparison of patterns was more nearly normalwhen anterior callosal fibers were present (partial agenesis). (C) 1999 Published by Elsevier Science Ltd. All rights reserved.

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Documento generato il 23/01/20 alle ore 06:29:07