Lack of lateral inhibitory interactions in visual cortex of monocularly deprived cats
نویسندگان
چکیده
منابع مشابه
Lack of lateral inhibitory interactions in visual cortex of monocularly deprived cats
To gain new insight into the effects of monocular deprivation, we studied the visual cortex of adult cats deprived of vision in one eye. Local field potentials were recorded in response to contrast reversal of square-wave gratings modulated in time either by pseudorandom, m-sequences or periodically. We have found that: (1) stimulation of the retinotopic locus of the recording site elicits resp...
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The visual fields of 16 cats raised with monocular eyelid suture were measured by means of a visual orienting test. We separately measured the fields of nondeprived and deprived eyes. Each cat was tested preoperatively, and 13 of the cats were tested following lesions of the visual cortex, superior colliculus, and/or optic chiasm. Preoperatively with the nondeprived eye, every cat had a normal ...
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The significance of functional maps for cortical plasticity was investigated by imaging of intrinsic optical signals together with single-unit recording in kittens. After even a brief period of monocular deprivation during the height of the critical period, only isolated patches of visual cortex continued to respond strongly to the closed eye. These deprived-eye patches were located on the pinw...
متن کاملVisual field defects in monocularly and binocularly deprived cats.
(1) A perimetry test was used to measure the visual responsiveness of discrete regions in the visual field of 2 normal, 4 monocularly deprived (MD) and 2 binocularly deprived (BD) cats. One of the MD cats as an adult underwent a reverse suture operation which forced it to use its formerly deprived eye for a 9 month period. Except for this MD cat which was tested only with its formerly deprived ...
متن کاملMonocularly deprived cats: improvement of the deprived eye's vision by visual decortication.
Monocularly deprived cats were tested for visual perinetry before and after visual cortex lesions. Such a lesion greatly enhances the deprived eye's performance and impairs that of the nondeprived eye so that the pronounced preoperative interocular asymmetry is lost postoperatively. Apparently this destruction of abnormal corticotectal pathways allows the expression of previously suppressed, no...
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ژورنال
عنوان ژورنال: Vision Research
سال: 1998
ISSN: 0042-6989
DOI: 10.1016/s0042-6989(97)00158-2