THE FLICKER RESPONSE CURVE FOR FUNDULUS
نویسندگان
چکیده
منابع مشابه
The Flicker Response Curve for Fundulus
After Fundulus heteroclitus have been for some time in the laboratory, under conditions favorable for growth, and after habituation of the fishes to the simple routine manipulations of the observational procedure required, they are found to give reproducible values of the mean critical flash illumination (I(m)) resulting in response to visual flicker. The measurements were made with equality of...
متن کاملThe Flicker Response Curve for Fundulus by W. J. Crozier and Ernst Wolf
A number of vertebrates have been examined by us as to the form of the interdependence of flash frequency (F) and flash intensity (I) for reaction to visual flicker. The technic, apparatus, and procedure have been uniform in all these cases. There has been used, except in special experiments, a flash cycle in which light time and dark time are equal, and the temperature is the same (21.5°). We ...
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By cytological criteria the retina of the gecko is devoid of cones. The visual cells are structurally rods# and are associated with a visual purple. ~ Determinations were made of the interdependence of flash frequency and flash illumination for threshold response to visual flicker, using the species Sphaerodactylus inaguae Noble. These measurements give a flicker response contour for flash cycl...
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The flicker response contour for the frog Rana pipiens exhibits the duplex character typical for most vertebrates. By comparison (under the same conditions of temperature, 21.5 degrees , and light-time fraction, = 0.5), the low intensity section of the F - log I curve is the smallest thus far found. The cone portion of the curve is satisfactorily described by a probability integral. The rod par...
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Flicker fusion threshold (F.F.T.) means the frequency with which successive flashes of light must occur to just appear to the eye free from flicker. A simple portable machine is described which will deliver flashes of light at any required interval. Patients with hypertension or anemia have a lower than normal F.F.T.; furthermore, administration of nitroglycerin, 0.4 mg. sublingually, or papave...
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ژورنال
عنوان ژورنال: Journal of General Physiology
سال: 1940
ISSN: 1540-7748,0022-1295
DOI: 10.1085/jgp.23.6.677