Independence of Location of Light Absorption and Discrete Wave Latency Distribution in Limulus Ventral Nerve Photoreceptors

Discrete waves of depolarization evoked by dim pulses of light in dark-adapted ventral nerve photoreceptors in Limulus show fluctuation in their latency. To a resolution of 5–10 µm the latency distribution function appears to be independent of where in the receptor light is absorbed. Also, there is apparent local adaptation to bright light pulses.