The relation of vibratory sensitivity to pressure.

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Abstract
In this study the sensitivity of different regions of the skin to stimulation by mechanical and electrical vibration was investigated. Results are summarized as follows: (1) The regions of the skin most sensitive to mechanical vibration were those spots which were also highly sensitive to pressure. (2) There was a marked difference between the dorsal and ventral sides of the arm with respect to vibratory sensitivity by mechanical stimulation. (3) The only spots on the surface of the skin yielding vibratory sensations to stimulation by alternating electrical currents were those points which were highly sensitive to pressure. (4) Electrical stimulation of spots near, but not on, pressure points gave the experience of "burning vibration." (5) Electrical stimulation of local skin areas not containing pressure-sensitive spots yielded the experience of "burning pain." (6) The only skin regions mediating vibratory experiences to the alternating electrical currents were the palms of the hands, the soles of the feet, and pressure-sensitive spots in any general region of the body. In general, the data support the hypothesis that vibration sensations form a perceptual pattern of feeling of which pressure is but another temporal expression. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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