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In anatomy, the masseter [help 1] is one of the muscles of mastication. Found only in mammals, it is particularly powerful in herbivores to facilitate chewing of plant matter. [ 5 ] The most obvious muscle of mastication is the masseter muscle, since it is the most superficial and one of the strongest.
It is located between the lateral aspect of the mandible and the medial aspect of the masseter muscle and its investing fascia. The term is derived from sub-meaning "under" in Latin and masseteric which refers to the masseter muscle. The submasseteric space is one of the four compartments of the masticator space. [1]
The jaw jerk reflex can be classified as a dynamic stretch reflex. As with most other reflexes, the response to the stimulus is monosynaptic, with sensory neurons of the trigeminal mesencephalic nucleus sending axons to the trigeminal motor nucleus, which in turn innervates the masseter. This reflex is used to judge the integrity of the upper ...
Muscle soreness can be minimal and disappear within minutes or hours, or it can be longer-lasting, which is known as delayed onset muscle soreness or (DOMS), adds Alexander Rothstein, Ed.D., NSCA ...
It passes laterally superior to the lateral pterygoid muscle, anterior to the temporomandibular joint, and posterior to the tendon of the temporalis muscle.It crosses (the posterior portion of) the mandibular notch alongside the masseteric artery before branching out upon the surface of the masseter muscle, then entering the muscle.
Signs and symptoms of temporomandibular joint disorder vary in their presentation. The symptoms will usually involve more than one of the various components of the masticatory system, muscles, nerves, tendons, ligaments, bones, connective tissue, or the teeth. [23] The three classically described, cardinal signs and symptoms of TMD are: [11] [24]
The masseter (composed of the superficial and deep head) The temporalis (the sphenomandibularis is considered a part of the temporalis by some sources, and a distinct muscle by others) The medial pterygoid; The lateral pterygoid; In humans, the mandible, or lower jaw, is connected to the temporal bone of the skull via the temporomandibular ...
The first device for measuring masticatory force (gnathodynamometer) was created by Black in 1893.He determined that periodontal tissue is an important issue, which impacts the amount of force.
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