DYNAMIC BEHAVIOR OF PHOTORECEPTOR CELLS IN FLY IN RESPONSE TO RANDOM (WHITE NOISE) STIMULATION AT A RANGE OF TEMPERATURES
DYNAMIC BEHAVIOR OF PHOTORECEPTOR CELLS IN FLY IN RESPONSE TO RANDOM (WHITE NOISE) STIMULATION AT A RANGE OF TEMPERATURES
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DOI：
10.1113/jphysiol.1978.sp012149
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发表时间：
1978-01-01
影响因子：
5.5
通讯作者：
JARVILEHTO, M
中科院分区：
文献类型：
--
作者：
FRENCH, AS;JARVILEHTO, M
Photoreceptor cells in Calliphora stygia were stimulated with randomly fluctuating green light while the resulting fluctuations in membrane potential were recorded with intracellular microelectrodes. Fourier analysis was used to obtain the frequency response functions between the light intensity fluctuations and the membrane potential fluctuations at a range of different temperatures. For small light fluctuations the transducer function can be molded by a cascade of 5 identical linear exponential filters whose time constants decrease as the temperature of the cell is increased. The time constants of the linear filters and their rate of change with temperature are similar to the electrical behavior of cell membranes. A series of chemical reactions with similar activation energies could also explain the observed behavior. The total light response is a linear summation of discrete waves of depolarization (bumps), which become longer in duration but of constant area as the temperature is reduced.
