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Titolo:
A comparison of koniocellular, magnocellular and parvocellular receptive field properties in the lateral geniculate nucleus of the owl monkey (Aotus trivirgatus)
Autore:
Xu, XM; Ichida, JM; Allison, JD; Boyd, JD; Bonds, AB; Casagrande, VA;
Indirizzi:
Vanderbilt Univ, Med Ctr, Sch Med, Dept Cell Biol, Nashville, TN 37232 USAVanderbilt Univ Nashville TN USA 37232 Cell Biol, Nashville, TN 37232 USA Vanderbilt Univ, Dept Psychol, Nashville, TN 37232 USA Vanderbilt Univ Nashville TN USA 37232 t Psychol, Nashville, TN 37232 USA Vanderbilt Univ, Dept Elect Engn, Nashville, TN 37232 USA Vanderbilt UnivNashville TN USA 37232 lect Engn, Nashville, TN 37232 USA Vanderbilt Univ, Dept Ophthalmol & Visual Sci, Nashville, TN 37232 USA Vanderbilt Univ Nashville TN USA 37232 isual Sci, Nashville, TN 37232 USA
Titolo Testata:
JOURNAL OF PHYSIOLOGY-LONDON
fascicolo: 1, volume: 531, anno: 2001,
pagine: 203 - 218
SICI:
0022-3751(20010215)531:1<203:ACOKMA>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
NEW-WORLD MONKEY; PRIMARY VISUAL-CORTEX; MARMOSET CALLITHRIX-JACCHUS; CALCIUM-BINDING PROTEINS; STRIATE CORTEX; CONTRAST-SENSITIVITY; GALAGO-CRASSICAUDATUS; CYTOCHROME-OXIDASE; MACAQUE MONKEY; BUSH BABY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
66
Recensione:
Indirizzi per estratti:
Indirizzo: Casagrande, VA Vanderbilt Univ, Med Ctr, Sch Med, Dept Cell Biol, 8888 Univ Dr, Nashville, TN 37232 USA Vanderbilt Univ 8888 Univ Dr Nashville TN USA37232 232 USA
Citazione:
X.M. Xu et al., "A comparison of koniocellular, magnocellular and parvocellular receptive field properties in the lateral geniculate nucleus of the owl monkey (Aotus trivirgatus)", J PHYSL LON, 531(1), 2001, pp. 203-218

Abstract

1. By analogy to previous work on lateral geniculate nucleus (LGN) magnocellular (M) and parvocellular (P) cells our goal was to construct a physiological profile of koniocellular (K) cells that might be linked to particularvisual perceptual attributes.2. Extracellular recordings were used to study LGN cells, or their axons, in silenced primary visual cortex (V1), in nine anaesthetized owl monkeys injected with a neuromuscular blocker. Receptive field centre-surround organization was examined using flashing spots. Spatial and temporal tuning and contrast responses were examined using drifting sine-wave gratings; counterphase sine-wave gratings were used to examine linearity of spatial summation.3. Receptive fields of 133 LGN cells and 10 LGN afferent axons were analysed at eccentricities ranging from 2.8 to 31.3 deg. Thirty-four per cent of K cells and only 9% of P and 6% of M cells responded poorly to drifting gratings. K, P and M cells showed increases in centre size with eccentricity, but K cells showed more scatter. All cells, except one M cell, showed linearity in spatial summation.4. At matched eccentricities, K cells exhibited lower spatial and intermediate temporal resolution compared with P and M cells. K contrast thresholdsand gains were more similar to those of M than P cells. M cells showed lower spatial and higher temporal resolution and contrast gains than P cells.5. K cells in different K LGN layers differed in spatial temporal and contrast characteristics, with K3 cells having higher spatial resolution and lon er temporal resolution than K1/K2 cells.6. Taken together with previous results these findings suggest that the K cells consist of several classes, some of which could contribute, to conventional aspects of spatial and temporal resolution.

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Documento generato il 06/04/20 alle ore 03:42:39