The Journal of General Physiology
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The Journal of General Physiology, Vol 22, 795-818, Copyright © 1939 by The Rockefeller University Press

ARTICLE

TEMPERATURE AND CRITICAL ILLUMINATION FOR REACTION TO FLICKERING LIGHT

IV. ANAX NYMPHS



W. J. Crozier 1 and Ernst Wolf 1

1 From the Biological Laboratories, Harvard University, Cambridge

At fixed flash frequency (F = 20, F = 55) and with constant light time fraction (50 per cent) in the flash cycle, the critical illumination I for response of Anax nymphs to visual flicker falls continuously as the temperature rises. The temperature characteristic µ for the measure of excitability (1/I) increases continuously with elevation of temperature. The form of the F - log I curve does not change except at quite high temperature (35.8°), and then only slightly (near F = 55); Fmax. is not altered. The very unusual form of the 1/I curve as a function of temperature is quantitatively accounted for if two processes, with respectively µ = 19,200 and µ = 3,400, contribute independently and simultaneously to the control of the speed of the reaction governing the excitability; the velocities of these two processes are equal at 15.9°.

Accepted on March 1, 1939


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This article has been cited by other articles:


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 Arch Otolaryngol Head Neck SurgHome page
E. SIMONSON, M. S. FOX, and N. ENZER
INFLUENCE OF VESTIBULAR STIMULATION ON THE FUSION FREQUENCY OF FLICKER: IN NORMAL SUBJECTS AND IN PATIENTS WITH POSTCONCUSSION SYNDROME
Arch Otolaryngol Head Neck Surg, September 1, 1943; 38(3): 245 - 251.
[Abstract] [PDF]


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