The automatic recording of electrical skin resistance patterns on the human trunk

Document Type

Article

Publication Title

Electroencephalography and Clinical Neurophysiology

Abstract

1. 1. A new procedure has been described for the photographic recording of electrical skin resistance patterns on the human trunk, or other areas of the body. The explorations are accurate, almost automatic and rapid as compared with exploration by hand-held electrode. 2. 2. The basic principle of the method is the conversion of variations in skin resistance into variations in the brightness of a light source. By placing the light source directly over the exploring electrode, and propelling the electrode (by synchronous motor) over the skin at constant speed, a camera, properly positioned with respect to the explored field, photographs strips of light which vary in brightness according to the resistance differences along a corresponding strip of skin. To explore a large area, a series of consecutive, parallel strips is recorded. 3. 3. The adaptation of the procedure to measure the topographical variations of features other than skin resistance (e.g. skin temperature, hyperesthesia) are described or suggested. 4. 4. The major sources of error are described and shown to be unimportant in our current application of the instrument. Refinements which eliminate or greatly reduce these errors are suggested. © 1951.

First Page

361

Last Page

368

DOI

10.1016/0013-4694(51)90085-5

Publication Date

1-1-1951

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