Search Results - "Leventhal, A G"

Aging affects contrast response functions and adaptation of middle temporal visual area neurons in rhesus monkeys by Yang, Y, Liang, Z, Li, G, Wang, Y, Zhou, Y, Leventhal, A.G

“…Abstract In the present study we studied the effects of aging on the coding of contrast in area V1 (primary visual cortex) and MT (middle temporal visual area)…”
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Functional degradation of extrastriate visual cortex in senescent rhesus monkeys by Yu, S., Wang, Y., Li, X., Zhou, Y., Leventhal, A.G.

“…The receptive field properties of striate cortical (V1) cells degrade in senescent macaque monkeys. We have now carried out extracellular single unit studies…”
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Concomitant sensitivity to orientation, direction, and color of cells in layers 2, 3, and 4 of monkey striate cortex by Leventhal, AG, Thompson, KG, Liu, D, Zhou, Y, Ault, SJ

“…The receptive field properties of cells in layers 2, 3, and 4 of area 17 (V1) of the monkey were studied quantitatively using colored and broad-band gratings,…”
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Aging Affects the Neural Representation of Speed in Macaque Area MT by Yang, Yun, Zhang, Jie, Liang, Zhen, Li, Guangxing, Wang, Yongchang, Ma, Yuanye, Zhou, Yifeng, Leventhal, Audie G.

“…Human perception of speed declines with age. Much of the decline is probably mediated by changes in the middle temporal (MT) area, an extrastriate area whose…”
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GABA and Its Agonists Improved Visual Cortical Function in Senescent Monkeys by Leventhal, Audie G., Wang, Yongchang, Pu, Mingliang, Zhou, Yifeng, Ma, Yuanye

“…Human cerebral cortical function degrades during old age. Much of this change may result from a degradation of intracortical inhibition during senescence. We…”
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Neural correlates of boundary perception by Leventhal, A G, Wang, Y, Schmolesky, M T, Zhou, Y

“…The responses of neurons in areas V1 (17) and V2 (18) of anesthetized and paralyzed rhesus monkeys and cats were recorded while presenting a set of…”
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Organized arrangement of orientation-sensitive relay cells in the cat's dorsal lateral geniculate nucleus by Shou, TD, Leventhal, AG

“…We studied the physiological orientation biases of over 700 relay cells in the cat's dorsal lateral geniculate nucleus (LGNd). Relay cells were sampled at…”
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Degradation of stimulus selectivity of visual cortical cells in senescent rhesus monkeys by Leventhal, Audie G, Schmolesky, Matthew T, Wang, Youngchang, Pu, Mingliang

“…Human visual function declines with age. Much of this decline is probably mediated by changes in the central visual pathways. We compared the stimulus…”
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Direction biases of X and Y type retinal ganglion cells in the cat by Shou, T, Leventhal, A G, Thompson, K G, Zhou, Y

“…1. It has been reported that in the cat only a specialized group of retinal ganglion cells constituting approximately 1% of the overall population are…”
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Signal Timing Across the Macaque Visual System by Schmolesky, Matthew T, Wang, Youngchang, Hanes, Doug P, Thompson, Kirk G, Leutgeb, Stefan, Schall, Jeffrey D, Leventhal, Audie G

“…Matthew T. Schmolesky 1 , Youngchang Wang 1 , Doug P. Hanes 2 , Kirk G. Thompson 2 , Stefan Leutgeb 1 , Jeffrey D. Schall 2 , and Audie G. Leventhal 1 1…”
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Central projections of cat retinal ganglion cells by Leventhal, A G, Rodieck, R W, Dreher, B

“…The central projections of different groups of cat retinal ganglion cells were studied following small iontophoretic injections of horseradish peroxidase (HRP)…”
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Morphology and distribution of retinal ganglion cells projecting to different layers of the dorsal lateral geniculate nucleus in normal and Siamese cats by Leventhal, AG

“…Electrophoretic injections of horseradish peroxidase were made into physiologically characterized sites within the different layers of the dorsal lateral…”
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Retinal ganglion cells within the foveola of New World (Saimiri sciureus) and Old World (Macaca fascicularis) monkeys by Leventhal, A G, Thompson, K G, Liu, D

“…The morphology and distribution of retinal ganglion cells within the foveola of New World (Saimiri sciureus) and Old World (Macaca fascicularis) monkeys…”
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Extrinsic determinants of retinal ganglion cell structure in the cat by Leventhal, AG, Schall, JD, Ault, SJ

“…The degree to which a retinal ganglion cell's environment can affect its morphological development was studied by manipulating the distribution of ganglion…”
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Retinal constraints on orientation specificity in cat visual cortex by Schall, JD, Vitek, DJ, Leventhal, AG

“…Most retinal ganglion cells (Levick and Thibos, 1982) and cortical cells (Leventhal, 1983; Leventhal et al., 1984) subserving peripheral vision respond best to…”
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Relationships between ganglion cell dendritic structure and retinal topography in the cat by Schall, J D, Leventhal, A G

“…The morphology of ganglion cell dendritic trees varies across the cat retina. Evidence is presented that the variation in two attributes of ganglion cell…”
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Postnatal development of different classes of cat retinal ganglion cells by Ault, S J, Leventhal, A G

“…Previous investigators have documented the postnatal development of alpha and beta type ganglion cells in cat retinae (Ramoa et al. [1987] Science 237:522-525;…”
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Stimulus dependence of orientation and direction sensitivity of cat LGNd relay cells without cortical inputs: a comparison with area 17 cells by Thompson, K G, Leventhal, A G, Zhou, Y, Liu, D

“…The cortical contribution to the orientation and direction sensitivity of LGNd relay cells was investigated by recording the responses of relay cells to…”
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Class-specific cell death shapes the distribution and pattern of central projection of cat retinal ganglion cells by Leventhal, AG, Schall, JD, Ault, SJ, Provis, JM, Vitek, DJ

“…The development of the nasotemporal division in cat retina was studied. We find that in the normally pigmented neonatal cat significant numbers of ganglion…”
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Receptive-field properties of neurons in different laminae of visual cortex of the cat by Leventhal, A G, Hirsch, H V

“…1. Receptive-field properties of neurons in the different layers of the visual cortex of normal adult cats were analyzed quantitatively. Neurons were…”
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