TWENTY ONE. “The muscles associated with the movement of the lips (mouth) are (on each side): four elevators, four depressors and two muscles lateral to the angle. This totals twenty pared and one unpaired muscle.” Good description of the muscular mechanics of facial expressions.
https://lnkd.in/dG53As2
linkedin post 2022-06-29 05:12:48
Nigel Fleming
September 21, 2022