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Titolo:
Topography of orientation centre connections in the primary visual cortex of the cat
Autore:
Yousef, T; Toth, E; Rausch, M; Eysel, UT; Kisvarday, ZF;
Indirizzi:
Ruhr Univ Bochum, Fak Med, Abt Neurophysiol, D-44801 Bochum, Germany Ruhr Univ Bochum Bochum Germany D-44801 physiol, D-44801 Bochum, Germany
Titolo Testata:
NEUROREPORT
fascicolo: 8, volume: 12, anno: 2001,
pagine: 1693 - 1699
SICI:
0959-4965(20010613)12:8<1693:TOOCCI>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
STRIATE CORTEX; INTRINSIC CONNECTIONS; SELECTIVITY; ORGANIZATION; PREFERENCE; NETWORKS; NEURONS; MODEL; CELLS;
Keywords:
lateral connections; orientation selectivity; visuotopy;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
19
Recensione:
Indirizzi per estratti:
Indirizzo: Kisvarday, ZF Ruhr Univ Bochum, Fak Med, Abt Neurophysiol, Univ Str 150, D-44801 Bochum,Germany Ruhr Univ Bochum Univ Str 150 Bochum Germany D-44801ermany
Citazione:
T. Yousef et al., "Topography of orientation centre connections in the primary visual cortex of the cat", NEUROREPORT, 12(8), 2001, pp. 1693-1699

Abstract

The functional topography of lateral connections to orientation-centre zones was studied by optical imaging of intrinsic signals in combination with tracer injections (fluorescent beads and biocytin) and electrophysiologicalrecordings. Three-dimensional reconstruction of anterogradely labelled axon terminals and retrogradely labelled somata revealed a uniform distribution across all orientations in a non-patchy manner. The overall lateral extent of the labelling was 3-4 mm in layer 3, that is about half of the extent observed for orientation domain connections in the same layer. These bulk injection data are in contrast with the reportedly sharp orientation tuning of neurons of centre zones and suggest that orientation specificity here does not require highly specific connections. Nonetheless, another plausible scenario is that orientation centre connections are orientation specific but their specificity present at the single cell level cannot be revealed by bulk labelling due to their large spatial overlap. NeuroReport 12:1693-1699. (C) 2001 Lippincott Williams & Wilkins.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/01/20 alle ore 02:29:32