ANATOMY

Detailed explanation-1: -The platysma muscle is a broad sheet of muscle arising from the fascia covering the upper parts of the pectoralis major muscle and deltoid muscle. Its fibers cross the clavicle, and proceed obliquely upward and medially along the side of the neck.

Detailed explanation-2: -The platysma is contained within the superficial cervical fascia, which is a zone of loose connective tissue between the dermis and deep cervical fascia. The platysma originates from the fascia that covers the clavicle, the acromial region and the superior portions of the pectoralis major and deltoid muscles.

Detailed explanation-3: -Insertion: the muscle inserts on the mandible, the cheek skin, the commissure of the mouth, the orbicularis oris muscle, to the posterior border of the depressor anguli oris muscle, and in some cases higher as high as the orbicularis oculi muscle.

Detailed explanation-4: -Platysma Origin and Insertion These muscle fibers continue from the deltoid and pectoral region superiorly and medially and ascends to the anterior and lateral aspects of the neck. The platysma muscle insert into the border of the lower mandible (lower lip).

Detailed explanation-5: -Dissimilar to other muscles of the body that lie deep to the subcutaneous tissue, the platysma is located within the subcutaneous tissue of the neck (superficial layer of the cervical fascia). Its superficial position means that surgical dissections of the neck must acknowledge the underlying neurovascular structures.