Platysma
Etiology[edit | edit source]
Platysma in Greek means flat object.
Platysma muscle[edit | edit source]
The flat subcutaneous muscle extending from below the clavicle to the mouth is called platysma.
Anatomy[edit | edit source]
Origin: The platysma most commonly originated from the upper portion of thorax anterior to clavicle or subcutaneous tissue of the subclavicular and acromial regions and pectoralis.
Course: The platysma ascended upward and medially or ascended from the clavicle to the face.
Insertion: The platysma most commonly inserted on the cheek skin or the cutaneous muscles around the mouth or the mandibulocutaneous ligament or zygoma.
Nerve supply[edit | edit source]
The platysma was most commonly innervated by the cervical branch of the facial nerve or the cervical branch and mandibular branch of the facial nerve.
Actions[edit | edit source]
The most common action of the platysma was drawing the lips inferiorly or posteriorly.
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