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Titolo:
TERRITORIAL ORGANIZATION OF DIRECTION-SELECTIVE GANGLION-CELLS IN RABBIT RETINA
Autore:
VANEY DI;
Indirizzi:
UNIV QUEENSLAND,DEPT PHYSIOL & PHARMACOL,VIS TOUCH & HEAR RES CTR BRISBANE QLD 4072 AUSTRALIA
Titolo Testata:
The Journal of neuroscience
fascicolo: 11, volume: 14, anno: 1994,
parte:, 1
pagine: 6301 - 6316
SICI:
0270-6474(1994)14:11<6301:TOODGI>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
STARBURST AMACRINE CELLS; INNER PLEXIFORM LAYER; CAT RETINA; DENDRITIC MORPHOLOGY; RECEPTIVE-FIELDS; MAMMALIAN RETINA; PIGMENTED RABBIT; ALPHA-GANGLION; CARP RETINA; SIZE;
Keywords:
RETINAL GANGLION CELL; DIRECTION SELECTIVITY; DENDRITIC TERRITORIES; TRACER COUPLING; NEUROBIOTIN; RABBIT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
62
Recensione:
Indirizzi per estratti:
Citazione:
D.I. Vaney, "TERRITORIAL ORGANIZATION OF DIRECTION-SELECTIVE GANGLION-CELLS IN RABBIT RETINA", The Journal of neuroscience, 14(11), 1994, pp. 6301-6316

Abstract

The On-Off direction-selective (DS) ganglion cells in the rabbit retina comprise four discrete subtypes that orthogonally code the direction of image motion. This study examined the dendritic relationships between different subtypes of On-Off DS cells, which were identified by their distinctive type 1 bistratified (BiS1) morphology following the intracellular injection of a biotinylated tracer or Lucifer yellow under direct microscopic control. The dendrites of BiS1 cells that had closely spaced somata, which presumably comprised subtypes of On-Off DS cells with different preferred directions, were not randomly superimposed but were fasciculated into loose bundles. By contrast, tracer coupling revealed that neighboring On-Off DS cells of one subtype were highly territorial, providing complete coverage of the retina with minimaloverlap. This mirrors, on a larger scale,the territorial organizationwithin the dendritic tree of individual DS cells, suggesting that similar interactions shape both the branching pattern and the spatial extent of these neurons. Moreover, the dendrites at the edge of the dendritic field often formed tip-to-shaft or tip-to-tip contacts with dendrites from coupled cells, thus appearing to form closed dendritic loopsthat may be equivalent to those found within the dendritic tree. Consequently, the dendrites of one subtype are distributed uniformly and economically across the retina. The resulting plexus forms a strikinglyregular scaffold on which the presynaptic interneurons generate direction selectivity.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 06/07/20 alle ore 05:22:45