. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Figure 4. Schematic drawings of thoracic stretch receptors. The drawings in this and the next figures were based on specimens stained with methylene blue. B, B-type cell: C, C-type cell. Note that the cross- striation within every receptor muscle, from TSR-2 to TSR-6, is homogeneous. Scale bar, 100 ^m. the inset of Figure 6. The adaptive time courses of im- pulse discharges from rapidly and slowly adapting stretch receptors are also shown in Figure 6a and b. The phasic response has longer latency due to the slow rise of the
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Figure 4. Schematic drawings of thoracic stretch receptors. The drawings in this and the next figures were based on specimens stained with methylene blue. B, B-type cell: C, C-type cell. Note that the cross- striation within every receptor muscle, from TSR-2 to TSR-6, is homogeneous. Scale bar, 100 ^m. the inset of Figure 6. The adaptive time courses of im- pulse discharges from rapidly and slowly adapting stretch receptors are also shown in Figure 6a and b. The phasic response has longer latency due to the slow rise of the stimulus delivered at Hz: the phasic quality indicates dependence on the velocity; , the rate of displacement (angle/s) of the thoracic segment by the flexion stimulus (Fig. 7). Similar responses accompanied by tonic impulse discharges were recorded from the TSR-5 upon abdominal extension (downward imposed flexion) (data not shown). Extension produced much lower impulse frequencies than flexion, even when the degree of the applied stimulus was the same. In the presence of motor activities of the extensor neuron. ASR-1 ASR-2. RM Figure 5. Schematic drawings of abdominal stretch receptors. Homogeneous cross-striation is similarly noted in the abdominal receptor muscles. B. B-type cell; C. C-type cell. Scale bar, 100 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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