Paradoxical pupillary constriction in dark reared chicks

Paradoxical pupillary constriction in dark reared chicks

Newly hatched chicks were dark reared continuously for maturity. The average pupillary size in these chicks was 2.6 mm in comparison to 4.5 mm in the normal controls. There was no change immediately after exposure to light and only a slight recovery several weeks later. Histology showed no morpholog...

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Veröffentlicht in:Vision research (Oxford) 1981, Vol.21 (8), p.1319-1322
Hauptverfasser: Yinon, Uri, Urinowsky, Ehud, Barishak, Yom-Tov R.
Format: Artikel
Sprache:eng
Schlagworte:
Animals
Animals, Newborn
Biometry
Chickens
Darkness
Eye - pathology
Eye Color
Light
Pupil - physiology
Sensory Deprivation - physiology
Space life sciences
Time Factors
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Zusammenfassung:Newly hatched chicks were dark reared continuously for maturity. The average pupillary size in these chicks was 2.6 mm in comparison to 4.5 mm in the normal controls. There was no change immediately after exposure to light and only a slight recovery several weeks later. Histology showed no morphological change in the iris, ciliary body or lens, thus suggesting that the constriction found is functional and centrally controlled.
ISSN:0042-6989
1878-5646
DOI:10.1016/0042-6989(81)90237-6