Where is the triangularis muscle located

Located to the anterior of the neck, these muscles are split into two based on their location relative to the hyoid bone. The U-shaped hyoid bone sits below the mandible and in front of the esophagus, providing a level of protection and facilitating the wide range of muscle activity required for speaking and swallowing. Suprahyoid and infrahyoid muscles of the neck : Suprahyoid and infrahyoid muscle groups are named based on their location relative to the hyoid bone. The hyoid bone sits below the mandible and in front of the esophagus, providing a level of protection but also facilitating the wide range of muscle activity required for speaking and swallowing.

The four suprahyoid muscles found above the hyoid bone act in concert to elevate the hyoid bone, assisting with swallowing by widening the esophagus. The four infrahyoid muscles found below the hyoid bone act in concert to depress the hyoid bone during swallowing and speaking, compressing the esophagus.

Muscles of the back and neck : Muscles of the back and neck play an important role in maintaining posture and the movement of the head and neck. The muscles of the back and neck are responsible for maintaining posture and facilitating movement of the head and neck.

They are divided into three layers. Three columnar muscles in the intermediate layer are responsible for flexion and extension of the neck as well as posture maintenance. All three originate from a common tendon associated with the pelvis and can be divided into thoracic, cervicis, and capitis regions. Two muscles in the deep layer are responsible for maintenance of posture and rotation of the neck. Privacy Policy. Skip to main content.

Muscular System. Search for:. Head and Neck Muscles. Facial Muscles The human face is composed of multiple muscles that control the fine movements that produce facial expressions. You can read FutureLearn's Cookie policy here. An excellent course in a field people dream of working in.

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The use of a real investigation gave the course purpose and detail. Category: FutureLearn Local. Category: FutureLearn Local , Learning. This is called mentalis strain or lip strain. It can result from two skeletal problems. Second, when the lower jaw is behind the upper jaw, the lower lip can get "trapped" below the upper teeth requiring the chin muscle to flex and force the lower lip forward and up to get the lips together.

Platysma Muscle. The platysma muscle is a broad sheet of muscle arising from the pectoral chest and deltoid shoulder muscles and rises over the collarbone clavicle , proceeding upward in a slanting manner along the sides of the neck.

The two attachments of a muscle are called the origin and the insertion. The end of a muscle which is nearer to the midline of the body, which is more proximal, or less movable is called the origin. The end of a muscle furthest from the dorsal midline, more distal or more movable is called the insertion. The mentalis muscle originates on the mandible centrally and inserts into the skin of the chin.

The platysma muscle is the primary superficial muscle of the neck. It originates on the deltopectoral fascia and inserts onto the depressors of the lips, margin of the mandible, and mid cheek.

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.

Classic symptoms of strain in the chest muscle include: pain, which may be sharp an acute pull or dull a chronic strain swelling. Commonly known as muscle knots , these tender spots are sometimes also referred to as trigger points or myofascial pain. The tension in the muscle can put pressure on nerves and cause pain.

Depressor anguli oris arises from the oblique line of the mandible, whence its fibers converge, to be inserted, by a narrow fasciculus, into the angle of the mouth. The digastric muscle is composed of two bellies, anterior and posterior, connected by an intermediate round tendon. The two bellies of the muscle have different embryonic origins and hence are supplied by different cranial nerves. 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. This exercise helps to firm the muscles controlling the lip movements. Pucker the lips into a whistling or kissing position. Hold the pose for a five count before repeating for a total of 10 repetitions. At minimum ten muscles are required to smile in which only the upper lip and corners of the mouth are lifted.

A similarly minimal frown requires only six muscles to lower the corners of the mouth. About 43 muscles in a face are working to create a smile at any given moment. It is proven by Dr. The strongest muscle based on its weight is the masseter. With all muscles of the jaw working together it can close the teeth with a force as great as 55 pounds 25 kilograms on the incisors or pounds The uterus sits in the lower pelvic region.

Stapedius muscle is termed to be the smallest skeletal muscle in human body, which has a major role in otology. Stapedius muscle is one of the intratympanic muscles for the regulation of sound.

Antagonistic muscles always work in synergy: when one of the muscles contracts, the other relaxes.