. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. COCKROACH ORCADIAN RHYTHMICITY 693. 24 MRS FIGURE 7. Effect of eosin control gel on the pars intercerebralis of Leucophaca madcrac. Gel containing eosin instead of actinomycin D was inserted bilaterally into the pars intercere- bralis on day 0. Within a week after the operation, the animal resumed its pre-operative rhythm and showed a free-running rhythm in DD (on day 25-62). Histological observation confirmed (on day 68) that the brain was normal except that some parts of the pars intercerebralis had been damaged and that n
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. COCKROACH ORCADIAN RHYTHMICITY 693. 24 MRS FIGURE 7. Effect of eosin control gel on the pars intercerebralis of Leucophaca madcrac. Gel containing eosin instead of actinomycin D was inserted bilaterally into the pars intercere- bralis on day 0. Within a week after the operation, the animal resumed its pre-operative rhythm and showed a free-running rhythm in DD (on day 25-62). Histological observation confirmed (on day 68) that the brain was normal except that some parts of the pars intercerebralis had been damaged and that none of the implanted gel could be detected. two lobes of the protocerebrum severs the nerve tracts which emanate from the medial neurosecretory cells at the point where they cross to opposite sides. We have found that in post-operative animals in which only some lateral neurosecretory cells remained intact, normal rhythmicity could be re-established 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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