Electronic Resource
Springer
Experimental brain research
44 (1981), S. 41-56
ISSN:
1432-1106
Keywords:
Eye movements
;
Dark-rearing
;
Cat
;
Vestibulo-ocular reflex
;
Optokinetic nystagmus
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Summary Cats reared in total darkness to adulthood have abnormal eye movements. A spontaneous nystagmus is found in the dark before any visual experience. The eye movements evoked by vestibular or optokinetic stimulation are less effective at compensation than for a normal cat. The vestibuloocular reflex (VOR) has a low gain (around 0.3) and a frequency dependent phase relation. The efficiency of optokinetic nystagmus (OKN) is poorer than for a normal cat, except for downwards stimulus movement which is followed better than normal. OKN is poorest in response to a stimulus viewed monocularly moving in the nasal to temporal direction. Neither VOR nor OKN of a dark-reared cat recover in efficiency within 5 months of the animal being brought into the light. A normal cat put into the dark for 135 days shows none of these abnormalities except an occasional spontaneous nystagmus.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00238748
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