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Chapter 15 - The muscle of fright, of terror (m. platysma)

Published online by Cambridge University Press:  10 November 2010

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Summary

Plates 58, 59, 60, 61, 62, 63, 64, 65

Plates 58 & 59: To study the isolated action of m. platysma in an old man (also shown in Plates 3, 7, 8, 9, 12, 13, 14, 17, 18, 19, 20, 21, 22, 30, 31, 32, 33, 34, 37, 38, 39, 43, 44, 45, 46, 47, 48, 49, 51, 52, 53, 54, 55, 56, 57). In the first, electrical contraction of the left m. platysma: in the second, contraction of both mm. platysma: This contraction of m. platysma alone lacks expression.

Plate 60: To study the combined contraction of mm. platysma and mm. frontalis. Combined electrical contraction of mm. platysma and mm. frontalis: fright.

Plates 61 & 62: To study the combined electrical contraction of mm. platysma and mm. frontalis, associated with dropping of the lower jaw.

Electrical contraction of mm. platysma and mm. frontalis, with voluntary dropping of the lower jaw: terror seen full face in Plate 61 and in semiprofile in Plate 62.

Plate 63: To show that the expression of terror can be rendered with truth and energy even though the eyelids are half closed. The same muscular combination as in Plates 61 and 62, with lowering of the upper eyelids and downward gaze: expression of terror.

Plates 64 & 65: To study the combined electrical contraction of mm. platysma and mm. corrugator supercilii, associated with opening the mouth. […]

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Publisher: Cambridge University Press
Print publication year: 1990

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