Biomedical subjects

T J Frey

Publications and source records attributed to T J Frey.

3 recordsLinked to original sources

PubMed1982

Critical flicker frequency in monocularly deprived cats.

Critical flicker frequency (CFF) was determined for both eyes of long-term monocularly deprived (MD) cats over a wide luminance range. Although MD cats could discriminate flicker before and after lid opening, CFF of the deprived eye (30 Hz) was much lower than CFF of the non-deprived eye (40 Hz) and the CFF of the non-deprived eye was lower than a normal cat's monocular CFF (58 Hz). The CFF deficit of the deprived eye became less pronounced at low luminance levels. The observation (and magnitude) of a CFF deficit for the deprived eye is compatible with the reports of a Y-cell loss in LGNd. The CFF deficit of the non-deprived eye has no obvious explanation.

Animals↗

PubMed1982

Spatial contrast sensitivity does not explain random figure discrimination latency.

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Adult↗

PubMed1981

Critical flicker fusion in Siamese cats.

Critical flicker fusion was determined over a wide luminance range for six Siamese and four normal cats. The Siamese cats had the lowest CFF at all luminance levels when compared to normal and binocularly deprived (BD) cats. The Siamese cat's inferior temporal resolution is most likely due to their profound y-cell loss because (1) CFF is proportional to y-cell population across normal, BD, and Siamese cats; and (2) unlike BD cats, the visual cortex of Siamese cats is comparatively normal. The implication of this finding for the CFF of dark-reared cats and normal cats viewing a stimulus which does not stimulate y-cell is discussed.

Animals↗