From:
William Erasmus Darwin
To:
Charles Robert Darwin
Date:
[7–15 Apr 1868]
Source of text:
DAR 162: 80/4
Summary:
Langstaff has never seen the platysma act, and he believes it to be rudimentary in humans.
Contributor:
Darwin Correspondence Project
Langstaff has never seen the platysma act, and he believes it to be rudimentary in humans.
Describes the action of facial muscles at the onset of crying as observed by Langstaff.