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Titolo:
SEVERAL NEURONAL AND AXONAL TYPES FORM LONG INTRINSIC CONNECTIONS IN THE CAT PRIMARY AUDITORY CORTICAL FIELD (AI)
Autore:
CLARKE S; DERIBAUPIERRE F; ROUILLER EM; DERIBAUPIERRE Y;
Indirizzi:
INST PHYSIOL,RUE BUGNON 7 CH-1005 LAUSANNE SWITZERLAND INST PHYSIOL CH-1700 FRIBOURG SWITZERLAND
Titolo Testata:
Anatomy and embryology
fascicolo: 2, volume: 188, anno: 1993,
pagine: 117 - 138
SICI:
0340-2061(1993)188:2<117:SNAATF>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
RESPONSE-SPECIFIC BANDS; MEDIAL GENICULATE-BODY; VISUAL-CORTEX AREA-17; LEUKOAGGLUTININ PHA-L; TONOTOPIC ORGANIZATION; ISOFREQUENCY DIMENSION; BINAURAL COLUMNS; FREQUENCY MAPS; SINGLE AXON; LAYER-III;
Keywords:
AUDITORY CORTEX; INTRINSIC CIRCUITS; NEURONAL TYPES; AXONAL ARBORIZATIONS; CAT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
78
Recensione:
Indirizzi per estratti:
Citazione:
S. Clarke et al., "SEVERAL NEURONAL AND AXONAL TYPES FORM LONG INTRINSIC CONNECTIONS IN THE CAT PRIMARY AUDITORY CORTICAL FIELD (AI)", Anatomy and embryology, 188(2), 1993, pp. 117-138

Abstract

Intrinsic connections in the cat Primary auditory field (AI) as revealed by injections of Phaseolus vulgaris leucoagglutinin (PHA-L) or biocytin, had an anisotropic and patchy distribution. Neurons, labelled retrogradely with PHA-L were concentrated along a dorsoventral stripe through the injection site and rostral to it; the spread of rostrally located neurons was greater after injections into regions of low ratherthan high characteristic frequencies. The intensity Of retrograde labelling varied from weak and granular to very strong and Golgi-like. Out of 313 Golgi like retrogradely labelled neurons 79.6% were pyramidal, 17.2% multipolar, 2.6% bipolar, and. 0.6% bitufted; 13.4% were putatively inhibitory, i.e. aspiny or sparsely spiny multipolar, or bitufted. Individual anterogradely labelled intrinsic axons were reconstructed for distances of 2 to 7 mm. Five main types were distinguished on the basis of the branching pattern and the location. of synaptic specialisations. Type 1 axons travelled horizontally within layers II to VI and sent collaterals at regular intervals; boutons were only present inthe terminal arborizations of these collaterals. Type 2 axons also travelled horizontally within layers II to VI and had rather short and thin collateral branches; boutons or spine-like protrusions occurred inmost parts of the axon. Type 3 axons travelled obliquely through the cortex and formed a single terminal arborization, the only site where boutons were found. Type 4 axons travelled for some distance in layer I; they formed a heterogeneous group as to their collaterals and synaptic specializations. Type 5 axons travelled at the interface between layer VI and the white matter; boutons en passant, spine-like protrusions, and thin short branches with boutons en passant were frequent all along their trajectory. Thus, only some axonal types sustain the patchy pattern of intrinsic connectivity, whereas others are involved in a more diffuse connectivity.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 16:28:09