. Comparative animal physiology. Physiology, Comparative; Physiology, Comparative. Mechano- and Equilibrium-Reception 513 mm. Hg, when a few impulses appear, and at higher perfusion pressures the impulse frequency in single fibers is directly proportional to the pressure (Fig 183). There may be a slight fall in frequency after the initial dis- charge on increasing pressure, but the equilibrium frequency is main- tained more or less indefinitely.'''^- In the preceding account mechanoreceptors are arranged in a series from fast to slow adaptation. It is evidently useful in behavior that tactile
. Comparative animal physiology. Physiology, Comparative; Physiology, Comparative. Mechano- and Equilibrium-Reception 513 mm. Hg, when a few impulses appear, and at higher perfusion pressures the impulse frequency in single fibers is directly proportional to the pressure (Fig 183). There may be a slight fall in frequency after the initial dis- charge on increasing pressure, but the equilibrium frequency is main- tained more or less indefinitely.'''^- In the preceding account mechanoreceptors are arranged in a series from fast to slow adaptation. It is evidently useful in behavior that tactile mes- sages be brief and tension reception persistent. There is no clear histological correlation with speed of sensorv adaptation, and the cellular mechanism underlving these differences in adaptation remains to be discovered. Pain. Tactile and proprioceptive impulses travel in relatively large fibers (A fibers of the classification of Erlanger and Gasser, as given in Chapter 23). Free nerve endings of the vertebrate skin are stimulated by. 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 Prosser, C. Ladd (Clifford Ladd), 1907-; Bishop, David W. Philadelphia, Saunders
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