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Neural site of strabismic amblyopia in cats: X-cell acuities in the LGN

โœ Scribed by S. Gillard-Crewther; D. P. Crewther

Book ID
104681936
Publisher
Springer-Verlag
Year
1988
Tongue
English
Weight
656 KB
Volume
72
Category
Article
ISSN
0014-4819

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โœฆ Synopsis

The acuities of X-cells from the dorsal lateral geniculate nucleus (LGN) were measured in five cats raised with a convergent strabismus, surgically induced by tenotomy. The acuities of cells driven by the strabismic eye were not significantly different from the acuities of cells driven by the non-deviating eye over the range of eccentricities in the visual field studied (from the area centralis to over 20 degrees). The data were also similar to X-cell acuities in the LGN of 3 normal cats. Lowered acuities of LGN X-cells driven by the deviating eye of an esotropic cat in which the strabismus was created by myectomy confirm a previous finding of a retinal locus of amblyopia associated with that preparation. In contrast, the results here implicate the visual cortex as the initial site of the deficit in spatial processing in amblyopia arising from tenotomy strabismus.

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