platysma

/pluh-tiz-muh/US // pləˈtɪz mə //

鸭嘴兽,桔梗,柏拉图,铂金

Definitions

n.名词 noun

1
plural pla·tys·mas, pla·tys·ma·ta [pluh-tiz-muh-tuh], /pləˈtɪz mə tə/, Anatomy.
- : a broad, thin muscle on each side of the neck, extending from the upper part of the shoulder to the corner of the mouth, the action of which wrinkles the skin of the neck and depresses the corner of the mouth.

The platysma myoides, which is well developed on the neck, belongs to this system, but cannot be voluntarily brought into action.
On cutting through the skin and platysma some small veins may be met with: they should be clamped with forceps and divided.
I find, to my surprise, whenever I act thus my platysma contracts.
It must include skin, fascia, and platysma, and the flap must be thrown upwards.
In only four of the cases was the platysma visibly contracted; and it did not begin to contract until the patients began to cry.