platysma


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Related to platysma: sternocleidomastoid

platysma

 [plah-tiz´mah]
a subcutaneous neck muscle extending from the neck to the clavicle, acting to wrinkle the skin of the neck and to depress the jaw. See Appendix 3-4.

pla·tys·ma (mus·cle)

[TA]
facial muscle in neck region; 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.

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

The broad, flat muscle lying immediately under the skin of the neck, from the shoulders to the point of the chin. The action of the platysma is to tighten the skin of the neck, pull down the corners of the mouth and lower the jaw.

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 ?
Due to crosstalk observed between the left platysma and trapezius electrodes, the velocity algorithm for leftward and upward motion using EMG signals was adjusted such that only the greater of these signals would produce motion in their respective direction (i.e., a winner-take-all approach).
Our objective has been to determine the origin and arrangement of the platysma muscle and the SMAS in human specimens at 8-17 weeks of development and also the relationship of the superficial mimetic muscles with the SMAS.
Care must also be taken that the platysma muscle is not tensed during training.
At a time when routine neck exploration was advocated for all wounds penetrating the platysma, evidence emerged from South African centres that this was not justifiable, and a selective policy based on imaging became the standard approach.
The incision is extended through the subcutaneous tissue, platysma through to deep cervical fascia.
Genellikle spazmlar 40'li ve 50'li yaslarda orbicularis oculi kasindan baslar ve yillar icerisinde alina, alt yuz yarisina ve platysma yayilir.
He noted that in hemiplegia there is a deficient contraction of the muscle platysma (1897), exaggerated flexion of the forearm on the arm, an inversion of the habitual swinging of the arms while walking and combined flexion of the thigh and trunk.
This also softens the look of vertical banding caused by the platysma muscle that is often so pronounced in aging necks, and also helps minimize those visible folds and creases.
These include cutaneous branches of the cervical plexus supplying the skin overlying the posterior triangle; the platysma and omohyoid muscles; the spinal accessory nerve, which innervates the SCM and trapezius muscles; the deep cervical lymph nodes; the brachial plexus; and numerous arteries and veins--prominent is the external jugular vein (see Figure 2).
After careful draping and preparation of the operative site, an incision was made inferior and parallel to the left clavicle and carried deep to the platysma muscle.
Evaluation of facial muscle innervated by cranial nerve VII can be assessed easily and quite quickly; wrinkling of the forehead (frontalis), closing the eyes tightly (orbicularis oculi), closing the lips tightly (orbicularis oris), pulling back the corners of the mouth as in smiling (buccinator), and frowning (platysma) can be accomplished in under 10 seconds.