platysma muscle


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Related to platysma muscle: Scalene muscles, Strap muscles, Cervical muscles

pla·tys·ma mus·cle

(plă-tiz'mă mŭs'ĕl)
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(s): platysma [TA] .

platysma muscle

Neck and facial muscle. Origin: superficial fascia of upper chest. Insertion: skin of lower face. Nerve: facial (CN VII). Action: lowers jaw, widens neck.
See: face and headfor illus.
See also: muscle

pla·tys·ma mus·cle

(plă-tiz'mă mŭs'ĕl)
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(s): platysma [TA] .
References in periodicals archive ?
During the 9th-10th weeks, the platysma muscle arises from the cervical lamina and its mandibular extension.
During the 17th week of development, the insertion of the platysma muscle in the mandible and its continuity with the depressor labii inferioris muscle may be observed.
In specimens at 17th week of development, we have observed the continuity of the platysma muscle with the depressor labii inferioris muscle.
The Relationship of the Platysma Muscle and the SMAS.
In adults, it has been reported that the platysma muscle is subject to considerable variation, sometimes forming a very thin layer, largely interspersed among connective tissue.
Blood supply to the platysma muscle flap: An anatomic study with clinical correlation.
It passes deep into the platysma muscle and lateral to the posterior facial vein and the investing layer of the deep cervical fascia.
The incision is made through the skin, subcutaneous tissue, and platysma muscle to expose the gland (figure 3).
The submandibular capsule is sutured to the cervical fascia below the digastric muscle, and the cut ends of the platysma muscle are repaired.
INTRODUCTION: Reconstruction of moderate post excisional defects of angle of the mouth and adjacent lips with flaps taken from the nasolabial, lower cheek and the submandibular regions give better cosmetic and functional results than reconstructions with distant flaps as the sphincter function can also be restored using zygomaticus and platysma muscles.
The flaps included the zygomaticus and platysma muscles. Both the flaps with common base are now pulled medially as shown in Fig 4a.
During the sixth and seventh weeks following fertilization, the frontal, auricular, occipital, and platysma muscles are derived from the primordial superficial muscle sheet.