Platysma muscle actions
Draws 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 clenched
What is the platysma in anatomy?
Platysma Anatomy. 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. It is also known as “the shaving muscle” as it tenses the skin of the neck when contracted.
What does the platysma contribute to the facial expression?
It is important to note that the platysma contributes to the formation of the modiolus, which is a fibromuscular chiasm of facial muscles found in the corners of the mouth. Thereby, the platysma contributes to the formation of the orbicularis oris complex along with other muscles of facial expression.
What is the insertion of the platysma?
The insertion of a muscle refers to the point or points in the body where the muscle ends, and the platysma extends up the front of the neck and inserts onto the lower border of the mandible and the skin of the lower cheeks and lower lip. The mandible is another name for the lower jawbone.
What is platysma tightening and why is it important?
As you age, the platysma can shorten and thin, explains the JCS paper. This makes it important in treating sagging neck skin that can develop over time as your skin looses elasticity. Per the American Society of Plastic Surgeons, during a neck lift procedure, a surgeon will often target this muscle to tighten it.
What is the function of the platysma muscle?
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 type of muscle is the platysma?
voluntary muscleThe 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.
Where is platysma muscle located?
neckDissimilar 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 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 is the antagonist of the platysma?
Platysma muscleAntagonistmasseter muscle, temporalis muscleIdentifiersLatinPlatysmaTA98A04.2.01.00111 more rows
Is the platysma a muscle of mastication?
The muscles of mastication also function to approximate (bring together or close) the teeth. The superficial muscle of the neck, the platysma muscle, also assists with depression of the mandible against resistance.
What muscle raises the eyebrows?
frontalis muscleThe frontalis muscle is responsible for elevating the eyebrows, while the corrugator supercilii, orbicularis oculi, and procerus play a role in its depression. The function of the forehead is often spared in middle cerebral artery strokes.
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%).
How do you stretch your platysma muscle?
0:001:27Self Care - Platysma Stretch - YouTubeYouTubeStart of suggested clipEnd of suggested clipKeep your jaw closed. And bring your head. Back into extension so I'm gonna do that again this timeMoreKeep your jaw closed. And bring your head. Back into extension so I'm gonna do that again this time not talking. Hold this area go almost down to the clavicle.
What is meant by platysma?
noun, plural pla·tys·mas, pla·tys·ma·ta [pluh-tiz-muh-tuh], Anatomy. a broad, thin muscle on each side of the neck, extending from the upper part of the shoulder to the corner of the mouth, the action of which wrinkles the skin of the neck and depresses the corner of the mouth.
Which muscle helps move your shoulders quizlet?
A major upper body muscle, your deltoids help you move your shoulders.
What is the smiling muscle called?
zygomaticus majorEach smile hinges on an anatomical feature known as the zygomaticus major, straps of facial muscle below the cheekbones that pull up the corners of the mouth.
What is the unilateral action of the sternocleidomastoid muscle?
A unilateral contraction of the sternocleidomastoid muscle flexes the cervical vertebral column to the same side (lateral flexion) and rotates the head to the opposite side.
Which of the following is responsible for the muscle relaxation?
Relaxation: Relaxation occurs when stimulation of the nerve stops. Calcium is then pumped back into the sarcoplasmic reticulum breaking the link between actin and myosin. Actin and myosin return to their unbound state causing the muscle to relax.
Where is the platysma muscle located?
Platysma. The platysma muscle is a band of tissue found in the chest, neck, and facial region. This muscle covers a portion of a neck muscle known as the sternocleidomastoid. The platysma muscle is expansive in size, with a broad width that spans the collarbone, or clavicle, and the side of the neck. Its point of origination is the upper portions ...
Which muscle controls the eyelid?
In some instances, the platysma muscle can travel as far upwards as the cheekbone and the lower region of the muscle that controls eyelid movements, known as the orbicularis oculi. The facial nerve allows the muscle to move. With the platysma muscle , an individual can slightly part the mouth and draw out the corners of the lips to the side and down.
What is the name of the muscle that covers the neck?
This muscle covers a portion of a neck muscle known as the sternocleidomastoid. The platysma muscle is expansive in size, with a broad width that spans the collarbone, or clavicle, and the side of the neck. Its point of origination is the upper portions of the pectoral, or chest, and the deltoid, or shoulder. The muscle narrows in size once it reaches the neck, extending upwards to the lower jawbone, known as the mandible. Platysma muscle fibers are found throughout the lower region of the face, including the skin, tissue, and other bones of the mouth.
What muscle is used to draw out the corners of the lips?
With the platysma muscle, an individual can slightly part the mouth and draw out the corners of the lips to the side and down. These movements are used when negative emotions like fear and fright are conveyed. Last medically reviewed on January 26, 2015.
Why is it important to have a platysma?
This makes it important in treating sagging neck skin that can develop over time as your skin looses elasticity. Per the American Society of Plastic Surgeons, during a neck lift procedure, a surgeon will often target this muscle to tighten it.
What muscle helps you hold your mouth when brushing?
To some extent, this muscle aids in your daily oral care since the platysma helps you hold certain positions with your mouth when you brush. During brushing, regular cleanings or dental treatment, it helps you draw your cheeks back away from your mouth while your jaw is fully lowered so you or your dentist can reach your back teeth.
What muscle is the bottom of the jaw?
The platysma is a superficial neck muscle, as StatPearls explains, which means it's located close to your skin. Because of its location over the bottom jaw (also known as the mandible) and the skin in your lower face, it plays a role in opening your jaw — but as the JCS paper notes, its most important job is helping you make facial expressions. 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.
How many muscles are there in the face?
You might be surprised to learn that you have 42 muscles in your face alone, according to Smithsonian Magazine. The platysma muscle, which spans from your collarbone to your lower face, isn't one that typically receives much attention. But this muscle plays an important role in how you use your mouth and create facial expressions. Here's how it works in daily functions.
What would happen if you didn't have a mouth muscle?
Without this muscle, you might have a hard time sipping beverages, kissing, frowning or making any distinct facial movement that uses your lower mouth. Several other expressions that use the mouth, such as surprise, confusion or displeasure, also wouldn't be achievable without this muscle.
Where does the platysma muscle contract?
Once the platysma muscle receives the electrical impulses from the cranial nerve VII, it will contract and perform its action on the mandible and/or lips. The platysma muscle is a muscle the runs from the upper chest and shoulder area, up through the neck, and attaches to the skin around the mouth and the lower jawbone.
Where does platysma originate?
We mentioned that the platysma muscle originates from the upper chest and shoulder area, but specifically, it originates from the fascia of the pectoral (or chest) muscle and the deltoid (shoulder) muscles. Fascia is a thin layer of fibrous connective tissue under the skin that surrounds muscles and organs.
What muscle is responsible for a frown?
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 muscle attaches to the lower jawbone?
Since the platysma muscle attaches to the bone and skin around the lower jawbone (also known as the mandible ), the action of this muscle mostly pertains to this area of the body. The specific actions of the platysma muscle include: Additionally, the platysma muscle can cause wrinkles in the neck as a person ages.
How are muscles controlled?
All muscles are controlled by electrical impulses from the brain. Innervation is the process of the brain sending these electrical impulses to the muscles through a network of nerves. Each muscle receives these electrical impulses from a specific nerve.
What muscle is the biggest frown?
Did you feel the muscle in both sides of your neck pop out when you made the frown? That muscle is the platysma muscle , which is a muscle that runs from the upper chest/shoulder area, up through the neck, and attaches to the skin around the mouth and the lower jawbone. 2:44.
Muscle activity
Experts thought aging skin was the top cause of platysmal bands. But a small 2017 study debunked this. Researchers looked at 25 participants with definitive, unilateral, facial palsy following otoneurosurgical (ear and brain condition) treatment.
Platysmal bands Botox treatment
Botox (botulinum toxin type A injection) isn’t just for wrinkles. A 2018 research review showed that it may help reduce the appearance of platysmal bands by relaxing the muscles in the neck.
Dermal fillers
Dermal fillers are injectable treatments used to plump up the skin. It uses gel-like substances, such as hyaluronic acid, poly-L-lactic acid, or calcium hydroxyapatite.
Lower facelift
This is when a doctor tightens up the skin below the corners of your mouth. Excess skin is also trimmed to provide a more youthful look.
