The platysma, innervated by the facial nerve, is a thin, sheet-like voluntary muscle. Origin: the muscle has a broad origin with fibers arising from the fascia of the upper thorax including the clavicle, acromial region, pectoralis major and deltoid muscles.
What is the function of the platysma?
The platysma is responsible for drawing the skin around the lower part of your mouth down or out, which creases the skin in your lower face, according to the Loyola University Medical Education Network.
What action does the platysma muscle perform?
The actions of the platysma muscle include pulling down the mandible, which opens the mouth, and pulling the corners of the lips out to the side and down, which forms a frown. Additionally, the platysma muscle can form wrinkles in the neck as a person ages and their skin becomes less elastic and starts to sag.
Where are the Platysmal bands?
Platysmal bands are two strips of muscle that run vertically down both sides of your neck. They’re caused by contractions of the platysma, the most superficial muscle layer in the face and neck. While they don’t pose any health risks, it’s a cosmetic concern for some.
What are platysma bands?
Platysmal band are the two ridges of muscle that you may see running vertically up your neck. These neck bands can stand out more as we grow older, so they are a popular target for neck lift surgery in the UK. Neck Bands. The neck bands are formed by a muscle in your neck known as the platysma.
What is platysma innervated by?
The platysma was most commonly innervated by the cervical branch of the facial nerve (38.2%) or the cervical branch and mandibular branch of the facial nerve (60.5%), followed by the cervical plexus (0.6%), the cervical motor nucleus (0.6%), and the glossopharyngeal nerve (0.1%).
Where is the triangularis muscle located?
The depressor anguli oris muscle (triangularis muscle) is a facial muscle. It originates from the mandible and inserts into the angle of the mouth. It is associated with frowning, as it depresses the corner of the mouth.
What is the origin of the masseter muscle exercise 11?
The origin of the masseter muscle is the inferior zygomatic arch and the anterior two-thirds of the zygomatic arch, with a connection to the posterior aspect of the zygomatic bone.
What is the insertion of the masseter quizlet?
Masseter Insertion: Superficial portion: Into the angle and lower border of the mandible. Deep: Into the upper section of the ramus and the lateral surface of the coronoid process.
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