Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
CALLOSAL CONNECTIONS OF THE FERRET PRIMARY AUDITORY-CORTEX
Autore:
WALLACE MN; HARPER MS;
Indirizzi:
UNIV ABERDEEN,MARISCHAL COLL,DEPT BIOMED SCI ABERDEEN AB9 1AS SCOTLAND
Titolo Testata:
Experimental Brain Research
fascicolo: 2, volume: 116, anno: 1997,
pagine: 367 - 374
SICI:
0014-4819(1997)116:2<367:CCOTFP>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
RESPONSE-SPECIFIC BANDS; MUSTELA-PUTORIUS; BINAURAL COLUMNS; ORGANIZATION; CAT; PROJECTIONS; TERMINATIONS; SUBDIVISIONS; PATTERNS; MONKEYS;
Keywords:
BINAURAL BANDS; WHEAT GERM AGGLUTININ HORSERADISH PEROXIDASE; CORTICAL COLUMNS; AUDITORY SYSTEM; CORPUS CALLOSUM; FERRET;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
32
Recensione:
Indirizzi per estratti:
Citazione:
M.N. Wallace e M.S. Harper, "CALLOSAL CONNECTIONS OF THE FERRET PRIMARY AUDITORY-CORTEX", Experimental Brain Research, 116(2), 1997, pp. 367-374

Abstract

The callosal connections of ferret auditory cortex were studied by making multiple injections of wheat germ agglutinin-horseradish peroxidase into the middle ectosylvian gyrus or by packing crystals of horseradish peroxidase into the transected corpus callosum. The primary area (AI) had strong callosal connections that arose from somata mainly located in layer III. Other layers contained sparsely distributed cells that projected across the midline. The projecting cells occurred over the whole extent of AI but were not homogeneously distributed in layer III. The axons from these cells terminated mainly in the upper layers of the contralateral cortex, where they converged onto three discrete bands. The three elongated bands lay in a dorsoventral orientation, parallel to the tonotopic axis. They were slightly curved and had a fairly uniform width. The posterior band had a width of about 200 mu m, while the anterior and middle bands were more variable and had widths of300-800 mu m. The centre-to-centre distance between the posterior andmiddle bands was 520 +/- 60 mu m and for the anterior to middle bandswas 620 +/- 210 mu m. The retro grade labelling produced by the same injections showed that the cell bodies had a higher density in the terminal bands than in the intervening spaces. The bands of dense callosal connections appear to correspond to the binaural summation columns, which have been clearly demonstrated in the ferret, but direct evidence of this will need to be sought in a future study. The discrete nature of the callosal bands in the ferret appears to make it a suitable species for studying the relationship between callosal terminals and those arising in other areas of the brain and for clarifying the possibleexistence of separate functional systems within the auditory cortex.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/09/20 alle ore 12:04:21