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The four classical muscles of mastication elevate the mandible (closing the jaw) and move it forward/backward and laterally, facilitating biting and chewing. Other muscles are responsible for opening the jaw, namely the geniohyoid , mylohyoid , and digastric muscles (the lateral pterygoid may play a role).
In anatomy, the temporalis muscle, also known as the temporal muscle, is one of the muscles of mastication (chewing). It is a broad, fan-shaped convergent muscle on each side of the head that fills the temporal fossa , superior to the zygomatic arch so it covers much of the temporal bone . [ 1 ]
Superior rectus muscle; Inferior rectus muscle; Medial rectus muscle; jaw (muscles of mastication, the closing of the jaw is adduction): masseter; pterygoid muscles (lateral and medial) temporalis; vocal folds. Lateral cricoarytenoid muscle
The action of the muscle during bilateral contraction of the entire muscle is to elevate the mandible, raising the lower jaw. Elevation of the mandible occurs during the closing of the jaws. The masseter parallels the medial pterygoid muscle, but it is stronger and superficial fibres can cause protrusion.
Muscle cramps, also known as muscle spasms or charley horses, are the involuntary contraction of muscle fibers, says Dr. Lucas Buchler, a physician of sports medicine and orthopaedic surgery at ...
The lateral pterygoid muscle (or external pterygoid muscle) is a muscle of mastication. It has two heads. It lies superior to the medial pterygoid muscle. It is supplied by pterygoid branches of the maxillary artery, and the lateral pterygoid nerve (from the mandibular nerve, CN V 3). It depresses and protrudes the mandible. When each muscle ...
Charley horses can last for minutes, hours, or days. They can strike anywhere in the body, but the most common spots are the back of your lower leg/calf, back of your thigh, or the front of your ...
head, mouth (left/right) continuation of depressor anguli oris muscles other side of depressor anguli oris muscles facial artery: facial nerve [CNVII], mandibular branch or buccal branch depresses angle of mouth (frown) levator anguli oris: 0.6 [3] 1 levator labii superioris: head, mouth (left/right) medial part of infra-orbital margin of maxilla
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