The origin of the masseter muscle is the zygomatic arch. The zygomatic arch, also called the cheek bone or zygomatic process, is a bony arch that connects the temporal and zygomatic bones, which are located on the sides of the face/skull.

circular muscle

The masseter muscle is one of four muscles of mastication and has the primary role of closing the jaw in conjunction with two other jaw closing muscles, the temporalis and medial pterygoid muscles.

The temporalis muscle runs superficially, from the temporal bone to the coronoid process of mandible. The main function of this muscle is to produce the movements of the mandible at the temporomandibular joint and thus facilitate the act of mastication.

To actively stretch the temporalis muscle in the supine position, the patient inserts two fingers behind the lower incisor teeth and with the thumb under the chin gently pulls the mandible forward and then downward, gradually increasing the stretch. The head is stabilized by the opposite hand.

What are the causes & diagnosis of Temporalis Tendonitis? stress, tooth grinding, direct trauma to the Temporalis muscle, excessive gum chewing. In rare cases a condition called Coronoid Process Hyperplasia may be the cause of Temporal Tendinitis.

The temporalis muscle is a muscle that gets its name based on its location in the body. This muscle is a fan-shaped muscle located at the temporal bone in the skull, which is a bone of the side of the skull. A common term for the location of the temporal bone is the temple.

Which muscle name does not make sense? Extensor digitorium makes sense that this muscle is involved in extending the fingers and hand at the wrist. The naming gluteus minimus muscle makes sense that it is the smallest muscle of the buttock.

Loss of temporalis muscle mass commonly seen in cases of significant catabolism and/or generalized nutritional deficiency. In this case, patient suffers from a rapidly progressive malignancy.

Temporal hollowing commonly occurs after coronal approach craniofacial surgery. This deformity may be caused by lateral displacement of the zygoma, disinsertion or volume decrease of the temporalis muscle, or displacement and atrophy of the superficial temporal fat pad [1].

In addition to reduced muscle mass, symptoms of muscle atrophy include:

• having one arm or leg that is noticeably smaller than the others.
• experiencing weakness in one limb or generally.
• having difficulty balancing.
• remaining inactive for an extended period.

Myositis (my-o-SY-tis) is a rare type of autoimmune disease that inflames and weakens muscle fibers. Autoimmune diseases occur when the body’s own immune system attacks itself. In the case of myositis, the immune system attacks healthy muscle tissue, which results in inflammation, swelling, pain, and eventual weakness.

The most common of these diseases is myasthenia gravis, an autoimmune disease where the immune system produces antibodies that attach themselves to the neuromuscular junction and prevent transmission of the nerve impulse to the muscle.

The main symptom of myositis is muscle weakness. The weakness may be noticeable or may only be found with testing. Muscle pain (myalgias) may or may not be present. Dermatomyositis, polymyositis, and other inflammatory myositis conditions tend to cause weakness that gets worse slowly over weeks or months.

Myositis means inflammation of the muscles that you use to move your body. An injury, infection, or autoimmune disease can cause it. Two specific kinds are polymyositis and dermatomyositis. Polymyositis causes muscle weakness, usually in the muscles closest to the trunk of your body.