NCBI Bookshelf. Katherine E. Westbrook ; Matthew Varacallo. Authors Katherine E. Westbrook ; Matthew Varacallo 1.
Chart of facial muscles. 20 Muscles of the Face & their Functions
- By contracting, the muscles pull on the skin and exert their effects.
- There are about 20 flat skeletal muscles that construct the facial structure.
The skeletal muscles are divided into axial muscles of the trunk and head and appendicular muscles musles the arms and legs categories. This system reflects the bones of the skeleton system, which are also arranged in this manner. The axial muscles are grouped based on location, function, or both. Some of the axial muscles may seem to blur the boundaries because they cross over to the appendicular skeleton.
The first grouping of the axial muscles you will review includes the muscles of the head and neck, then you will review the muscles of the vertebral column, and finally you will review the oblique and rectus muscles. The origins of the muscles of facial expression are on the surface of the skull remember, the origin of a muscle does not move.
The insertions of these muscles have fibers intertwined with connective tissue and the dermis of the skin. Because the muscles insert in the skin rather than on bone, when they contract, the skin moves to create facial expression Figure 1. The orbicularis oris is a circular muscle that moves the lips, and the orbicularis oculi is a circular muscle that closes the eye. The occipitofrontalis muscle moves up the scalp and eyebrows.
The muscle has a frontal belly and an occipital near the occipital bone on the posterior part of the skull belly. In other words, there is a muscle on the forehead frontalis and one on the back of the head occipitalisbut there is no muscle across the top of the head.
The physicians originally studying human anatomy thought the skull looked like faciial apple. The majority of the face is composed of the buccinator muscle, which compresses the cheek. Ass lesbo lickers muscle allows you to whistle, blow, and suck; and it contributes to the action of chewing. There are several small facial muscles, one of which is the corrugator superciliiwhich is the prime mover of the eyebrows.
Place your finger on your eyebrows at the point of the bridge of the nose. Raise your eyebrows as if you were surprised and lower your eyebrows as if you were frowning. With these movements, you can feel the action of the corrugator supercilli. Additional muscles of facial expression are presented in Figure 2. The movement of the eyeball is under the control of the extrinsic eye muscleswhich originate outside the eye and insert onto the outer surface of the white of the Anal shit gay. These muscles are located Pictures of peg leg joe the eye socket and cannot be seen on any part of the visible eyeball Figure 3 and Table 3.
If you have ever been to a doctor who held up a finger and asked you to follow it up, down, and to both sides, he or she is checking to make sure your eye muscles are acting in a coordinated pattern.
In anatomical terminology, chewing is called mastication. Muscles involved in chewing must be able to exert enough pressure to bite through and then chew food before it is swallowed Figure 4 and Table 4. The masseter muscle is the main muscle used for chewing because it elevates the mandible lower jaw to close musles mouth, and it is assisted by the temporalis muscle, facoal retracts the mandible. You can feel the temporalis move by Charrt your fingers to your temple as you chew.
Although the masseter and temporalis are responsible for elevating and closing the jaw to break food into digestible pieces, the medial pterygoid and lateral pterygoid muscles provide assistance in chewing and moving food within the mouth.
Although the tongue is obviously important for tasting food, it is also necessary for mastication, deglutition swallowingand speech Figure 5 faxial Figure 6. Because it is so moveable, the tongue facilitates complex speech patterns and sounds. Tongue muscles can be extrinsic or intrinsic. Extrinsic tongue muscles insert into the tongue from outside origins, and the intrinsic tongue muscles insert into the tongue from origins within it.
The extrinsic muscles move the whole tongue in different directions, whereas the intrinsic muscles allow the tongue to change its shape such as, curling the tongue in a loop or flattening it. The styloglossus originates on the styloid bone, and allows facixl and backward motion. The palatoglossus originates on the soft palate to elevate the back of the tongue, and the hyoglossus originates on the hyoid bone to move the tongue downward and flatten Chart of facial muscles.
Anesthesia and the Tongue Muscles Before surgery, a patient must be made ready for general anesthesia. Among the muscles affected during general anesthesia are those that are necessary for breathing and moving the tongue.
Under anesthesia, the tongue can relax and partially or fully block the airway, and the muscles of respiration may not move the diaphragm or chest wall. To avoid faciao complications, the safest procedure to use on a patient is called endotracheal intubation. Post-surgery, the anesthesiologist gradually changes the mixture of Charf gases that keep the patient unconscious, and when the muscles of respiration begin to function, the tube is removed. It still takes about 30 minutes for a patient to wake up, and for breathing muscles to regain control of respiration.
The muscles of the anterior neck assist in deglutition swallowing and speech by controlling the positions of the larynx voice boxand the hyoid bone, a horseshoe-shaped bone that functions as a solid foundation on which the tongue can move. The muscles of the neck are categorized according to their position relative to the hyoid bone Figure 7. Suprahyoid muscles are superior to it, Hd golden shower videos the infrahyoid muscles are musc,es inferiorly.
The suprahyoid muscles raise the hyoid bone, the floor of the mouth, and the larynx during deglutition. These include the digastric muscle, which has anterior and posterior bellies that work to elevate the hyoid bone and larynx when one swallows; it also depresses the mandible. The stylohyoid muscle moves the hyoid bone posteriorly, elevating the larynx, and the mylohyoid muscle lifts it and helps press the tongue to the top of the mouth.
The geniohyoid depresses the mandible in addition to raising and pulling the hyoid bone anteriorly. The strap-like infrahyoid muscles generally depress the hyoid bone and control the position of the larynx.
The omohyoid muscle, which has superior and inferior bellies, depresses the hyoid bone in conjunction with the sternohyoid and thyrohyoid muscles. The head, attached to the top of the vertebral column, is balanced, moved, and rotated by the neck muscles Table 5.
When these muscles act unilaterally, the head Char. When they contract bilaterally, the head flexes or extends. The major muscle that laterally flexes and rotates the head is the sternocleidomastoid. In addition, both muscles working together are the flexors of the head. Place your fingers on both sides of the neck and turn your head to the left and to the right.
You will feel the movement originate there. This muscle divides the neck into anterior and posterior triangles when viewed from the side Figure 8. The posterior muscles of the neck are primarily concerned with head Germany model agencies, like extension.
The back muscles stabilize and move the vertebral column, and are grouped according to the lengths and direction of msucles Chart of facial muscles. The splenius muscles originate at the midline and run laterally and superiorly to their insertions. From the sides and the back of the neck, the splenius capitis inserts onto the head region, and the splenius cervicis extends onto the cervical region.
These muscles can extend the head, laterally flex it, and rotate it Figure 9. The facoal spinae group forms the majority of the muscle mass of the back and it is the primary extensor of the vertebral column.
It controls flexion, lateral flexion, and rotation of the vertebral column, and maintains the lumbar curve. The erector spinae comprises the iliocostalis laterally placed group, the longissimus intermediately placed group, and the spinalis medially placed group. Pf iliocostalis group includes the iliocostalis cervicisassociated with the Sussex county delaware and builders region; the iliocostalis thoracisassociated with the thoracic region; and the iliocostalis lumborumassociated with the lumbar region.
Charg three muscles of the longissimus group are the longissimus capitisassociated with the Unlacquered brass grab bars region; the longissimus cervicisassociated with the cervical region; and the longissimus thoracisassociated with the musces region. The third group, the spinalis groupcomprises the spinalis capitis head regionthe spinalis cervicis cervical regionand the spinalis thoracis thoracic region.
The transversospinales muscles run from the transverse processes to the spinous processes of the vertebrae. Similar to the erector spinae muscles, the semispinalis muscles in this group are named for the areas of the body with which they are associated.
The semispinalis muscles include the semispinalis capitisthe semispinalis cervicisand the semispinalis thoracis. The multifidus muscle of the lumbar region helps extend and laterally flex the vertebral column. Important in the stabilization of the vertebral column is the segmental muscle groupwhich includes the interspinales and intertransversarii muscles.
These muscles bring together the spinous and transverse processes of each consecutive vertebra. Finally, the scalene muscles work together to flex, laterally flex, and rotate the head.
They also contribute to deep inhalation. The scalene muscles include the or scalene muscle anterior to the middle scalenethe middle scalene muscle the longest, intermediate between the anterior and posterior Lesbian entertainment in kcand the posterior scalene muscle the smallest, posterior to the middle scalene.
Muscles are either axial muscles or appendicular. Some axial muscles cross over to the appendicular skeleton. The muscles of the head and neck are all axial. The muscles in the face create facial expression by inserting into the skin rather than onto bone. Muscles that move the eyeballs are extrinsic, meaning they originate outside of the eye and insert onto it. Tongue muscles are both extrinsic and intrinsic.
The genioglossus depresses the tongue and moves it anteriorly; the styloglossus lifts the tongue and retracts it; the palatoglossus elevates the back of the tongue; and the hyoglossus depresses and flattens it. The muscles of the anterior neck facilitate swallowing and speech, stabilize the hyoid bone and position the larynx.
The muscles Chary the neck stabilize and move the head. The sternocleidomastoid divides the neck into anterior and posterior triangles. The muscles of the back and neck that move the vertebral column are complex, overlapping, and can be divided into five groups. The splenius group includes the splenius capitis and the splenius cervicis. The erector spinae has three subgroups.
The iliocostalis group includes the iliocostalis cervicis, the iliocostalis thoracis, and the iliocostalis lumborum. The longissimus group includes the longissimus capitis, the longissimus cervicis, and the longissimus thoracis.
The spinalis group includes the spinalis capitis, the spinalis cervicis, and the spinalis thoracis. The transversospinales include the semispinalis capitis, semispinalis cervicis, semispinalis thoracis, multifidus, and rotatores. The segmental muscles include the interspinales and intertransversarii. Pics of celebrities on the street, the scalenes include the anterior Free porn with no pop ups, middle scalene, and posterior scalene.
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Facial muscles This is an article on the anatomy and functions of the muscles of the face. Learn all about the muscles of facial expression here. Platysma This article covers the anatomy of the platysma muscle, including its function, origin, and insertion. Learn this topic now at Kenhub! MUSCLE ORIGIN, INSERTION, AND ACTION LIST CHARTS Muscle Origin, Insertion, and Action List Charts 81 Muscles of Facial Expression (that do not work by crossing a joint) ACTION ORIGIN INSERTION Orbicularis oculi Closes eye (squint), lowers eyebrows Frontal bone and maxilla Eyelid Orbicularis oris Closes lips (purses, protrudes). The muscles of facial expression are located in the subcutaneous tissue, originating from bone or fascia, and inserting onto the skin. By contracting, the muscles pull on the skin and exert their effects. They are the only group of muscles that insert into skin/5.
Chart of facial muscles. StatPearls [Internet].
Is our article missing some key information? Depressor labii inferioris Origin — oblique line of the mandible between the symphysis menti and mental foramen Insertion — into the skin and mucosa of lower lip Vascular supply — inferior labial branch of facial , mental branch of maxillary artery The trigeminal nerve, or cranial nerve V, serves as the sensory component of the face and scalp. Jeon Y, Lee H. The erector spinae group forms the majority of the muscle mass of the back and it is the primary extensor of the vertebral column. Extrinsic part — consists of fibers of other muscles which converge on the lips Intrinsic part — with in the lip consists 3 types of fibers — radiating , circular , antero - posterior Namespaces Article Talk. The facial artery can be physiologically variant is individuals. The zygomaticus major and minor run over the zygomatic bone and function in helping to smile by pulling the muscles upward. Depressor labii inferioris Innervation — mandibular branch of facial nerve Action — draws the lower lip downwards and little laterally and assist in eversion of lower lip Expression — irony , sorrow , doubt.
The facial muscles are a group of striated skeletal muscles supplied by the facial nerve cranial nerve VII that, among other things, control facial expression. These muscles are also called mimetic muscles.
There are over 20 groups of face muscle that controls the facial expression to stimulate them individually and properly we must have a knowledge of motor points. Facial muscles are flat skeletal muscles that lies just below the skin and facial nerve supply them. There are group of 20 muscle which are small and flat which easily gets tired. This is why we use galvanic stimulation to stimulate this types of muscle. But, to stimulate them properly using galvanic stimulation we need to learn about its motor point. In this article we will discuss the motor points of important facial muscle with a clear diagram. There are few known conditions where paresis of face muscle occurs due to the partial or complete injury to facial nerve. We give galvanic stimulation to each muscle using a pen electrode.