Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
ANATOMICAL DEMONSTRATION OF OCULAR DOMINANCE COLUMNS IN STRIATE CORTEX OF THE SQUIRREL-MONKEY
Autore:
HORTON JC; HOCKING DR;
Indirizzi:
UNIV CALIF SAN FRANCISCO,BECKMAN VIS CTR,10 KIRKHAM ST SAN FRANCISCO CA 94143
Titolo Testata:
The Journal of neuroscience
fascicolo: 17, volume: 16, anno: 1996,
pagine: 5510 - 5522
SICI:
0270-6474(1996)16:17<5510:ADOODC>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
LATERAL GENICULATE-NUCLEUS; PRIMARY VISUAL-CORTEX; CYTOCHROME-OXIDASE PATCHES; SHREW TUPAIA-GLIS; OLD-WORLD MACAQUE; LAMINAR ORGANIZATION; TRANSNEURONAL TRANSPORT; HORSERADISH-PEROXIDASE; SAIMIRI-SCIUREUS; COMPLETE PATTERN;
Keywords:
OCULAR DOMINANCE COLUMNS; SQUIRREL MONKEY; STRIATE CORTEX; CYTOCHROME OXIDASE PATCHES; STRABISMUS; STEREOPSIS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
75
Recensione:
Indirizzi per estratti:
Citazione:
J.C. Horton e D.R. Hocking, "ANATOMICAL DEMONSTRATION OF OCULAR DOMINANCE COLUMNS IN STRIATE CORTEX OF THE SQUIRREL-MONKEY", The Journal of neuroscience, 16(17), 1996, pp. 5510-5522

Abstract

The squirrel monkey is the only primate reported to lack ocular dominance columns. Nothing anomalous about the visual capacity of squirrel monkeys has been found to explain their missing columns, leading to the suggestion that ocular dominance columns might be ''an epiphenomenon, not serving any purpose'' (Livingstone et al., 1995), Puzzled by theapparent lack of ocular dominance columns in squirrel monkeys, we made eye injections with transneuronal tracers in four normal squirrel monkeys. An irregular mosaic of columns, averaging 225 mu m in width, was found throughout striate cortex. They were double-labeled by placingwheat germ agglutinin-horseradish peroxidase into the left eye and [H-3]proline into the right eye, The tracers labeled opposite sets of interdigitating columns, proving they represent ocular dominance columns. The columns were much clearer in layer IVc alpha (magno-receiving) than IVc beta (parvo-receiving). In the lateral geniculate body, the parvo laminae showed extensive mixing of ocular inputs, suggesting that increased label spillover contributes to the blurred columns in layer IVc beta. The cytochrome oxidase (GO) patches were organized into distinct rows, but they bore no consistent relationship to the ocular dominance columns. These experiments indicate that ocular dominance columns are less well segregated in squirrel monkeys than macaques, but theyare present. This fact is pertinent to a recent study reporting that ocular dominance columns are absent in normal squirrel monkeys, but induced to form by strabismus (Livingstone, 1996).

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/12/20 alle ore 21:56:08