What does Digastricus mean?

: of, relating to, or being either of a pair of muscles that depress the lower jaw and raise the hyoid bone during swallowing.

What are the functions of the digastric muscle?

Structure and Function The digastric muscle functions during swallowing, chewing, and speech. The anterior belly of the digastric is one of the three suprahyoid muscles which stabilizes the hyoid during swallowing, an action critical in protecting the airway while eating.

What causes digastric muscle pain?

Pain or discomfort in the digastric muscle may be related to muscle tears and sprains or injuries due to overuse. Some conditions which may affect the digastric muscle include myopathy, atrophy, infectious myositis, lacerations, contusions or neuromuscular diseases.

What is the muscle under the chin called?

Description. The digastric muscle (also digastricus) (named digastric as it has two ‘bellies’) is a small muscle located under the jaw. The term “digastric muscle” refers to this specific muscle. However, other muscles that have two separate muscle bellies include the ligament of Treitz, omohyoid, occipitofrontalis.

What is 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.

What does digastric mean in anatomy?

Medical Definition of digastric muscle : either of a pair of muscles having two bellies separated by a median tendon that extend from the anterior inferior margin of the mandible to the temporal bone and serve to depress the lower jaw and raise the hyoid bone especially during swallowing. — called also digastric.

Which of the following is an action of the digastric?

The main actions performed by the digastric muscle are to lower the mandible and elevate the hyoid bone during a swallow. Lowering the mandible allows the mouth and jaw to open and elevating the hyoid bone aides in substances traveling down the throat during a swallow.

What is unusual about the digastric muscle?

Each of the digastric muscle bellies has a unique point of origin. The posterior belly originates at the medial surface of mastoid notch of temporal bone. From here it travels anteroinferiorly towards the hyoid bone, piercing the stylohyoid muscle before attaching into the intermediate tendon of digastric muscle.

Why does the muscle under my chin hurt?

What causes them? TMDs are caused by muscle tension, often triggered by stress. Clenching or grinding your teeth can tire the jaw muscles, leading to muscle spasms, tissue damage, pain, and sore muscles. A TMD can also start with an injury to the jaw joint or a joint disease like osteoarthritis or rheumatoid arthritis.

Why does underneath my chin hurt?

Most swollen glands or lumps under the skin are not cause for concern. The glands (lymph nodes) on either side of the neck, under the jaw, or behind the ears commonly swell when you have a cold or sore throat. More serious infections may cause the glands to enlarge and become very firm and tender.

What is the function of sternocleidomastoid?

How are the two bellies of the digastricus United?

The digastricus (digastric muscle) consists of two muscular bellies united by an intermediate rounded tendon. The two bellies of the digastric muscle have different embryological origins, and are supplied by different cranial nerves .

What is the function of the digastric muscle?

Function. The digastric muscle is involved in any complex jaw action such as speaking, swallowing, chewing and breathing. When the digastric muscle contracts, it acts to elevate the hyoid bone . If the hyoid is being held in place (by the infrahyoid muscles ), it will tend to depress the mandible (open the mouth).

How many triangles are in the digastric muscle?

The digastric muscle divides the anterior triangle of the neck into three smaller triangles.

Is the digastric fossa part of the mastoid process?

The mastoid notch is a deep groove between the mastoid process and the styloid process. The mastoid notch is also referred to as the digastric groove or the digastric fossa. The posterior belly is supplied by the digastric branch of facial nerve .