. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 480 JAMES CASE AND M. S. TRINKLE example of what would appear to be such inhibition is Figure 3 in which a long series of flashes generated in register with I/sec, stimulation of the light organ are terminated by illumination. However, the excitation-flash latency (measured oscilloscopically ) in this sequence amounts to 136 msec. \Yhile this is probably insufficient time to allow facilitative effects ria the brain, there is clearly sufficient time for reflexive facilitation via the abdominal ventral nerve cord. Even if the
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 480 JAMES CASE AND M. S. TRINKLE example of what would appear to be such inhibition is Figure 3 in which a long series of flashes generated in register with I/sec, stimulation of the light organ are terminated by illumination. However, the excitation-flash latency (measured oscilloscopically ) in this sequence amounts to 136 msec. \Yhile this is probably insufficient time to allow facilitative effects ria the brain, there is clearly sufficient time for reflexive facilitation via the abdominal ventral nerve cord. Even if the excitation-flash latency were sufficiently short to preclude CNS effects on the immediately following flash, there is no assurance that a long-term facilatory state built up in the CXS does not affect the flashing sequence. This is illustrated in Figure 4 where a series of voluntary flashes is mixed with driven flashes. Imme- diate inhibition of the voluntary component occurs upon illumination, along with a gradual diminution of the driven component. We attribute this to an effect of light on the voluntary component, defacilitating the driven flashes. This seems to be confirmed by the events after cessation of illumination in this same experi-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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