Definition of Platysma
1. Noun. Either of two broad muscles located on either side of the neck and innervated by the facial nerve; extends from lower jaw to clavicle and is involved in moving the mouth and jaw.
Definition of Platysma
1. Noun. (anatomy) A muscle in the neck ¹
¹ Source: wiktionary.com
Definition of Platysma
1. a neck muscle [n -S]
Medical Definition of Platysma
1.
Origin, subcutaneous layer and fascia covering pectoralis major and deltoid at level of first or second rib; insertion, lower border of mandible, risorius and platysma of opposite side; action, depresses lower lip, forms ridges in skin of neck and upper chest when jaws are "clenched", denoting stress, anger; nerve supply, cervical branch of facial.
Synonym: platysma, musculus platysma myoides, musculus platysma, musculus subcutaneus colli, musculus tetragonus.
(05 Mar 2000)
Lexicographical Neighbors of Platysma
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