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Titolo:
Organisation of binaural interactions in the primary and dorsocaudal fields of the guinea pig auditory cortex
Autore:
Rutkowski, RG; Wallace, MN; Shackleton, TM; Palmer, AR;
Indirizzi:
MRC, Inst Hearing Res, Nottingham NG7 2RD, England MRC Nottingham England NG7 2RD Hearing Res, Nottingham NG7 2RD, England
Titolo Testata:
HEARING RESEARCH
fascicolo: 1-2, volume: 145, anno: 2000,
pagine: 177 - 189
SICI:
0378-5955(200007)145:1-2<177:OOBIIT>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOUND PRESSURE LEVEL; INTERAURAL INTENSITY DIFFERENCES; CAT CEREBRAL-CORTEX; SINGLE NEURONS; RESPONSE PROPERTIES; ORGANIZATION; REPRESENTATION; SENSITIVITY; SYSTEM; TIME;
Keywords:
auditory cortex; interaural level difference; interaural intensity difference; binaural interaction; binaural topography;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Rutkowski, RG MRC, Inst Hearing Res, Univ Pk, Nottingham NG7 2RD, England MRC Univ Pk Nottingham England NG7 2RD ham NG7 2RD, England
Citazione:
R.G. Rutkowski et al., "Organisation of binaural interactions in the primary and dorsocaudal fields of the guinea pig auditory cortex", HEARING RES, 145(1-2), 2000, pp. 177-189

Abstract

This study investigated the nature and topography of binaural interactionsin the primary auditory field (AI) and dorsocaudal field (DC) of the urethane anaesthetised guinea pig auditory cortex. Single and multi-units were classified by their responses to monaural and binaural stimulation. In both AI and DC, units displayed binaural facilitation, binaural inhibition, or alevel dependent mixture of facilitation and inhibition. There was a significant difference in the distribution of binaural response types between thetwo fields. Facilitated units predominated in DC (facilitated: 58%; inhibited: 24%; mixed: 6%; non-interacting: 12%), while inhibited units were the most common class in AI (facilitated: 15%; inhibited: 44%; mixed: 18%; non-interacting: 22%). It has previously been suggested that inhibited and facilitated units are concerned with processing different areas of space suggesting a possible separation of function between the two core fields. Topographically, the binaural response properties in AI and DC varied along isofrequency bands, with neurones displaying similar interactions aggregating in clusters. These clusters were similar in size for the two fields and often overlapped neighbouring isofrequency bands. However, their shape and position varied between different animals. This clustered organisation of binaural interactions is similar to that reported in recent studies of AI in othermammals. (C) 2000 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/09/20 alle ore 11:57:51