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 is the action of the platysma muscle quizlet?
What are the actions of the Platysma muscle? depresses the mandible and lower lip and tenses the skin of the anterior neck, shriek m. What nerve innervates the Platysma muscle? Where is the Sternocleidomastoid muscle?
Where are the platysma muscles?
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.
What movement does the platysma perform?
Platysma muscleActionsdraws the corners of the mouth inferiorly and widens it (as in expressions of sadness and fright). Also draws the skin of the neck superiorly when teeth are clenchedAntagonistmasseter muscle, temporalis muscleIdentifiersLatinPlatysmaIs platysma a muscle of facial expression?
The platysma is often an overlooked muscle of facial expression due to its location on the neck, but it contributes nonetheless.
What is the action of the orbicularis oris?
OriginMedial aspects of maxilla and mandible, perioral skin and muscles, modiolusActionCloses mouth, compresses and protrudes lips
What is the origin of Platysma quizlet?
Origin and insertion The platysma originates from the fascia that covers the clavicle, the acromial region and the superior portions of the pectoralis major and deltoid muscles. From its origin, the platysma passes over the clavicle and ascends through the anterolateral sides of the neck.
What happens to the platysma muscle as we age?
With age, the platysma muscles of the neck can weaken, contributing to the appearance of noticeable vertical lines or “bands.” Displaced fat and thinning skin can accentuate the appearance of the bands. There is no need to wear a turtleneck every day to hide platysma bands.What is the Sternohyoid muscle?
As for the sternohyoid muscle, it is a flat muscle located on both sides of the neck. This muscle originated from the medial edge of the clavicle bone, sternoclavicular ligament, and posterior side of the manubrium. The sternohyoid muscle then ascends the neck and attaches to the body of the hyoid bone.
What is the action of Sternocleidomastoid?Function. Rotation of the head to the opposite side or obliquely rotate the head. It also flexes the neck. When acting together it flexes the neck and extends the head.
Article first time published onWhat causes platysma to spasm?
Platysmal bands are caused by aging and thickening of two edges of the neck muscles. There are many causes, including age, genetics, and muscle activity. The neck also has a much thinner layer of skin than the face. Treatment options are available, ranging from noninvasive cosmetic procedures to surgery.
What nerve Innervates the Platysma muscle?
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%).
Why do Platysmal bands separate?
Platysma are a thin, broad sheet of muscles, positioned on each side of the neck. It is divided into two separate and distinct sides, which meet in the center. As these muscles become weaker and separate, the unwanted platysma bands develop.
What separates the subcutaneous layer from the Platysma muscle?
Using a straight Metzenbaum scissor, the surgeon separates the sub- cutaneous layer from the platysma muscle and exposes the fat pad.
What is the insertion of the rectus abdominis quizlet?
Insertion: linea alba; pubic crest; pubic tubercle; anterior half of iliac crest. Action: rotation and lateral flexion of trunk; increases intraabdominal pressure during forced expiration.
What is the action of the orbicularis oris quizlet?
Insertion: orbicularis oris. Action: draws corner of mouth laterally. Compresses cheek (as in whistling).
What is the action of the orbicularis oris chegg?
Question: Muscle Origin Insertion Action Orbicularis oris Muscles near the mouth Skin of central lip Sternocleidomastoid Mastoid process of Pulls head to one side, temporal bone flexes neck or elevates sternum Occipital bone and Clavicle, spine, and Rotates scapula; spines of cervical and acromion process of various …
What is the primary action of the masseter?
The masseter muscle is one of the four muscles responsible for the action of mastication (chewing). When the masseter contracts it causes powerful elevation of the mandible causing the mouth to close.
What is the action of the Sartorius muscle?
The function of the sartorius is unique in that it can serve as both a hip and knee flexor. The origin for the sartorius is the anterior superior iliac spine, sharing this origin with the tensor fascia lata. At the hip, it acts to both flex the hip as well as externally rotate.
What is the function of Sternohyoid muscle?
Sternohyoid muscleInsertionhyoid boneArterysuperior thyroid arteryNerveC1-C3 by a branch of ansa cervicalisActionsdepresses hyoid
What is the insertion of the Sternohyoid muscle?
Relations. The sternohyoid muscle is one of the infrahyoid “strap” muscles. It is superficial to the sternothyroid and thyrohyoid muscles and inserts just medial to the superior belly of the omohyoid muscle on the inferior border of the hyoid bone.
What is the insertion of Sternohyoid?
OriginManubrium of sternum, medial end of clavicleInsertionInferior border of body of hyoid boneActionDepresses hyoid bone (from elevated position)
Does Botox in Platysmal bands work?
When injected into the vertical bands of the neck, Botox can relax the dynamic muscles, making them less prominent, and resulting in a smoother, younger looking neck. The results can generally last 4-6 months.
Where are the Platysmal bands in the neck?
The platysmal bands are the two muscles that are located on both sides of your neck. Since the neck has a much thinner layer of skin than the face and the skin around your neck naturally loses fat deposits and collagen as you get older, these muscles usually become increasingly visible over time.
What causes neck cording?
Neck cords are caused by the involuntary movement of muscles controlled by motor nerves. BOTOX Cosmetic® and other neurotoxins temporarily inhibit the signal transmission from these motor nerves to the muscles. These chemical neuromodulators usually work for 3-4 months before another treatment is necessary.
What is the function of the sternocleidomastoid muscle quizlet?
The sternocleidomastoid muscle is a two-headed neck muscle, which true to its name bears attachments to the manubrium of sternum (sterno-), the clavicle (-cleido-), and the mastoid process of the temporal bone (-mastoid). Flexes neck ; rotates head.
What attaches to the sternocleidomastoid muscle?
OriginInsertionSuperior border/anterior surface of medial third of clavicleNuchal line of occipital bone
What action is provided by the contraction of both sternocleidomastoid muscles?
This extension movement brings the head backward. A contraction of both SCM muscles also flexes your neck, which brings your chin down in the direction of your breastbone. And bilateral SCM muscles contraction thrusts the chin forward when your head is level.
Do platysma exercises work?
Platysma tone: This helps in toning the chin and cheek muscles. Working on platysma also helps in firming the neckline and prevents sagging of the neck. Open your mouth slightly pulling back your lips tight and turning them downward, move your jaw up and down while keeping your lips pressed against the teeth.
What artery supplies the platysma?
Results: The submental artery was the primary vessel to the platysma muscle. The superior thyroid artery, occipital artery, and posterior auricular artery were identified as secondary vessels. The external jugular vein provided the primary venous drainage, followed by the submental vein.
Is the Platysma a muscle of mastication?
-Superficial to the muscle are the integument, the Platysma, the Risorius, the Zygomaticus major, and the parotid gland; the parotid duct, branches of the facial nerve, and the transverse facial vessels cross the muscle. …
