The mentalis muscle is innervated by the cranial nerve VII, which is also called the facial nerve VII. It should be noted that the mentalis muscle receives its blood flow from the facial artery, which is a smaller branch of the carotid artery.
The platysma is innervated by cervical branch of the facial nerve.
Also, what nerve controls lower lip? The marginal mandibular branch of the facial nerve controls the muscles of the lower lip. Damage to this facial nerve branch is a frequent cause for lower lip weakness.
Correspondingly, what is the function of the Mentalis muscle?
The mentalis muscle is a paired muscle located at the tip of the chin. It acts as the primary muscle of the lower lip. The mentalis originates from the mandible (lower jaw) and runs vertically from below the lower lip to the lower part of the chin. This muscle provides stability to the lower lip to allow it to pout.
Is Mentalis muscle superficial?
Muscles of the head, face, and neck. The mentalis is a paired central muscle of the lower lip, situated at the tip of the chin. It originates from the mentum and inserts into the chin soft tissue. Externally, mentalis contraction causes wrinkling of the chin skin, as used in expressions of doubt or displeasure.
What is deep cervical fascia?
The deep cervical fascia (or fascia colli in older texts) lies under cover of the platysma, and invests the muscles of the neck; it also forms sheaths for the carotid vessels, and for the structures situated in front of the vertebral column. Its attachment to the hyoid bone prevents the formation of a dewlap.
Why does my Platysma muscle hurt?
Located underneath the platysma on the sides of the neck are the sternocleidomastoid muscles. These muscles and the deep muscles of the neck can be the causes of neck pain due to muscle strains, muscle tension, and other issues. A common cause of neck pain is muscle strain. This is often a result of incorrect posture.
Which muscles elevate the mandible?
Key Points The masseter elevates the jaw, closing the mouth. The temporalis elevates and retracts the jaw. The lateral pterygoid is the only muscle of mastication that actively opens the jaw. The medial pterygoid elevates and closes the jaw, contributes to protrusion of the mandible, and assists in mastication.
What nerve affects the side of the neck and the Platysma muscle?
Glossary cervical cutaneous nerve Cervical nerve located at the side of the neck; affects the front and sides of the neck as far down as the breastbone. cervical nerves Branches of the seventh cranial nerve; originate at the spinal cord and affect the side of the neck and the platysma muscle.
Are Scalenes deep to Platysma?
The scalene muscles are located deep in relation to the sternocleidomastoid muscle, lateral to the cervical spine, connecting the vertebrae to the first two ribs. The deep fascia or prevertebral fascia envelop the scalene muscles.
What nerve controls the Sternocleidomastoid?
The sternocleidomastoid is innervated by the accessory nerve of the same side. It supplies only motor fibres. The cervical plexus supplies sensation, including proprioception, from the ventral primary rami of C2 and C3.
Is Platysma a muscle of facial expression?
Platysma anatomy. The platysma muscle lies within the subcutaneous tissue in the anterolateral neck. The platysma is considered to be one of the muscles of facial expression because of its association with the skin of the face and neck, and because it will join to muscles that surround the mouth.
What is Platysmal banding?
The Platysmal bands are two strips of muscles that start at the base of your neck and run up the front left and right sides of your neck, all the way up to the jaw, in the area where “frown lines” are prominent.
What causes Mentalis strain?
Lip incompetency is defined as ‘the inability to close the lips without strain’ . This gap can be caused by a variety of factors such as an anterior open bite, excessive maxillary overjet, excessive facial height or a shortened upper lip .
What is the smiling muscle?
The zygomaticus major is a muscle of the human body. It is a muscle of facial expression which draws the angle of the mouth superiorly and posteriorly to allow one to smile.
Is the chin a muscle?
Muscles of the head, face, and neck. (Labeled as triangularis near chin.) The transversus menti, or transverse muscle of the chin, is a facial muscle that is often considered to be the superficial fibers of the depressor anguli oris muscle which cross to the other side of the face. This muscle article is a stub.
What are the muscles of the face and neck?
These include the buccinator, masseter, temporalis and pterygoid muscles. Below the muscles of your face are neck muscles that help support and move your head. These include the sternocleidomastoid muscles, which flex your neck, move your head from shoulder to shoulder and turn your face from side to side.
What does the Platysma muscle do?
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.
What are the muscles of facial expression?
The facial muscles include: Occipitofrontalis muscle. Temporoparietalis muscle. Procerus muscle. Nasalis muscle. Depressor septi nasi muscle. Orbicularis oculi muscle. Corrugator supercilii muscle. Depressor supercilii muscle.