抄録
A KCl-filled microelectrode was inserted into the retina of the carp to record an intracellular slow potential. Especially flicker and fusion of this potential in response to intermittent light was studied with special reference to temperature. The light-dark ratio of the stimulus was 1:1.
1. The critical fusion frequency (CFF) was different according to the types of elements. In the N-element which showed a simple negativegoing response to a steady illumination, the CFF was lower than that of the A-element which showed a positive overawing at cessation of illumination. For example, the CFF of a N-element was 48 cps. at 29°C, while that of an A-element was 72 cps. at the same temperature.
2. The CFF-log intensity relation was investigated at three different temperatures. The general trend of the relation was very similar to those obtained by the psychophysical and behavorial methods, and a single smooth curve was sufficient to represent the data at each temperature.
3. The maximal CFF was found higher with increasing temperatures, and this feature and the general trend of the CFF-log intensity curve could be accounted for on the basis of the photochemical theory as formulated by Jahn.
