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.

platysma

/pla·tys·ma/ (plah-tiz´mah) a platelike muscle that originates from the fascia of the cervical region and inserts in the mandible and the skin around the mouth. It wrinkles the skin of the neck and depresses the jaw.

platysma

[plətiz′mə]
Etymology: Gk, platys, broad
one of a pair of platelike, wide muscles at the side of the neck. It arises from the fascia covering the superior parts of the pectoralis major and the deltoideus, crosses the clavicle, and rises obliquely and medially along the side of the neck. The platysma covers the external jugular vein as the vein descends from the angle of the mandible to the clavicle. The platysma is innervated by the cervical branch of the facial nerve and serves to draw down the lower lip and the corner of the mouth. When the platysma fully contracts, the skin over the clavicle is drawn toward the mandible, increasing the diameter of the neck.

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] .

platysma

the superficial sheet of cutaneous muscle over the face and neck.
References in periodicals archive ?
Consultation of the surgical literature confirms that scalenus anterior lies deep to the clavicular head of SCM, and gives further insight: Mattson (2004) in an article on the surgical approach to anterior scalenectomy clearly describes how the surgeon must progress through the skin, platysma, the clavicular head of SCM and a fat pad before scalenus anterior becomes visible.
Use of a platysma myocutaneous flap for the reimplantation of a severed ear: experience with five cases.
The lower layer of the platysma was cut through, and subplatysmal flap dissection was performed from the sternal notch to the level of the thyroid cartilage superiorly.
High- frequency electric knife was used to separate the loose connective tissues between platysma and cervical fascial space.
5cm elliptical incision was made through the platysma, around the fistula opening and the area of induration.
Incision was given through skin, subcutaneous tissue and platysma muscle from the angle of the mandible caudally to the external jugular vein to expose the fibrous capsule of mandibular gland.
Marginal mandibular nerve was identified and preserved after dissection of the platysma.
As the neck continues to age, the fibers holding the two medial ends of the platysma in the midline weaken which leads to the appearance of "bands" running the length of the neck.
In the past 10-15 years surgeons all over the world have changed the classic approach of mandatory exploration of wounds involving the platysma into a selective conservative intervention policy, thus eliminating the risks of non-therapeutic surgical neck explorations.
CT shows an enhancing mass involving the SLS associated with subcutaneous streaking and thickening of the platysma muscle.
alveoli brachialis buccinator calcaneus canine Eustachian tube incisor jejunum maxillary sinus mental foramen metatarsals pericardium phalanges pituitary platysma sphenoid sternocleidomastoid trapezius trochlea vertebra
CHIN TONER THIS exercise strengthens the platysma muscle which runs down both sides of the neck.