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РЖ ВИНИТИ 34 (BI49) 95.12-04М1.418

Zhou, Yifeng.
Visual deprivation does not affect the orientation and direction sensitivity of relay cells in the lateral geniculate nucleus of the cat [Text] / Yifeng Zhou, Audie G. Leventhal, Kirk G. Thompson // J. Neurosci. - 1995. - Vol. 15, N 1. - P689-698 . - ISSN 0270-6474
Перевод заглавия: Зрительная депривация не влияет на ориентационную и дирекциональную избирательность релейных клеток наружного коленчатого тела у кошки
Аннотация: In this study cats were reared from birth to 6-12 months of age in total darkness; the orientation and direction sensitivities of area 17 (striate cortex) and LGNd cells were compared. All cells were studied using identical quantitative techniques and statistical tests designed to analyze distributions of angles. The results confirm previous work and indicate that the orientation and direction sensitivities of cells in area 17 are profoundly reduced by dark rearing. In marked contrast, these properties of LGNd relay cells are unaffected. The result is that, unlike in the normal cat, in dark-reared cats the orientation and direction sensitivities of cells in the LGNd and visual cortex do not differ. It is concluded that (1) the orientation and direction sensitivities of cortical cells contribute little, if at all, to the sensitivities of LGNd cells since LGNd cells exhibit normal sensitivities even though the cortical cells projecting to them exhibit greatly reduced sensitivities and (2) during normal development intracortical mechanisms appear to expand upon and/or modify the weak orientation and direction sensitivities of their inputs. These intracortical mechanisms depend upon normal visual experience since in dark-reared cats, but not normal ones, the orientation and direction sensitivities of cells in the LGNd and visual cortex do not differ quantitatively or qualitatively. Библ. 39

ГРНТИ	34.41.35

ВИНИТИ 341.41.35.27.07.07
Рубрики: ЗРИТЕЛЬНАЯ СИСТЕМА
НАРУЖНОЕ КОЛЕНЧАТОЕ ТЕЛО
РЕЦЕПТИВНЫЕ ПОЛЯ
ЗРИТЕЛЬНАЯ ДЕПРИВАЦИЯ
ПОЛЕ 17
КЛЕТКИ X
КЛЕТКИ Y
КОШКИ

Доп.точки доступа:
Leventhal, Audie G.; Thompson, Kirk G.

РЖ ВИНИТИ 34 (BI24) 95.12-04М3.352

Zhou, Yifeng.
Visual deprivation does not affect the orientation and direction sensitivity of relay cells in the lateral geniculate nucleus of the cat [Text] / Yifeng Zhou, Audie G. Leventhal, Kirk G. Thompson // J. Neurosci. - 1995. - Vol. 15, N 1. - P689-698 . - ISSN 0270-6474
Перевод заглавия: Зрительная депривация не влияет на ориентационную и дирекциональную избирательность релейных клеток наружного коленчатого тела у кошки
Аннотация: In this study cats were reared from birth to 6-12 months of age in total darkness; the orientation and direction sensitivities of area 17 (striate cortex) and LGNd cells were compared. All cells were studied using identical quantitative techniques and statistical tests designed to analyze distributions of angles. The results confirm previous work and indicate that the orientation and direction sensitivities of cells in area 17 are profoundly reduced by dark rearing. In marked contrast, these properties of LGNd relay cells are unaffected. The result is that, unlike in the normal cat, in dark-reared cats the orientation and direction sensitivities of cells in the LGNd and visual cortex do not differ. It is concluded that (1) the orientation and direction sensitivities of cortical cells contribute little, if at all, to the sensitivities of LGNd cells since LGNd cells exhibit normal sensitivities even though the cortical cells projecting to them exhibit greatly reduced sensitivities and (2) during normal development intracortical mechanisms appear to expand upon and/or modify the weak orientation and direction sensitivities of their inputs. These intracortical mechanisms depend upon normal visual experience since in dark-reared cats, but not normal ones, the orientation and direction sensitivities of cells in the LGNd and visual cortex do not differ quantitatively or qualitatively. Библ. 39

ГРНТИ	34.39.19

ВИНИТИ 341.39.19.09.15
Рубрики: ЗРИТЕЛЬНАЯ СИСТЕМА
НАРУЖНОЕ КОЛЕНЧАТОЕ ТЕЛО
РЕЦЕПТИВНЫЕ ПОЛЯ
ЗРИТЕЛЬНАЯ ДЕПРИВАЦИЯ
ПОЛЕ 17
КЛЕТКИ X
КЛЕТКИ Y
КОШКИ

Доп.точки доступа:
Leventhal, Audie G.; Thompson, Kirk G.

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