. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. LIMULUS NEUROMUSCULAR TRANSMISSION 213 o- 4O lOOmsec II III FIGURE 4. The responses to short trains of stimuli in three different muscle fibers (i-iii). (i) Slow axon. Three responses from the same fiber showing the summation of 's and the small degree of facilitation. A small spike arises in c from the plateau of depolarization, (ii and iii) Fast axon. a, low frequency; b-d, higher frequency. Successive steps ('s) are progressively larger (facilitation). Summation is evident; occasional spikes arise from the dep
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. LIMULUS NEUROMUSCULAR TRANSMISSION 213 o- 4O lOOmsec II III FIGURE 4. The responses to short trains of stimuli in three different muscle fibers (i-iii). (i) Slow axon. Three responses from the same fiber showing the summation of 's and the small degree of facilitation. A small spike arises in c from the plateau of depolarization, (ii and iii) Fast axon. a, low frequency; b-d, higher frequency. Successive steps ('s) are progressively larger (facilitation). Summation is evident; occasional spikes arise from the depolarization plateau. gm. tension at the tip of the tibia (Fig. 3). On repetitive stimulation appre- ciable tension developed, increasing with increasing frequency of stimulation up to a maximum of just over 50 gm. at 200 per second. Thus the tetanus/twitch ratio was more than 100: 1. The 's initially increased in magnitude by two or three times during a train of stimulation, a phenomenon usually referred to as facilitation, but later diminished as they also summated to give a plateau of de- polarization. From the plateau occasionally a small spike arises (Fig. 4i, c). The fast response. The fast axon evoked electrical responses in most of the muscle fibers penetrated. They were often very small, but they were always larger OT mV 40-L. lOOmsec. 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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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
