Masseteric nerve

Masseteric Nerve is a branch of the mandibular nerve, the third division of the trigeminal nerve, which is the fifth cranial nerve. It plays a crucial role in the innervation of the masseter muscle, a muscle of mastication.

Etymology

The term "masseteric" is derived from the Greek word "másētḗr," which means "chewer." The term "nerve" comes from the Latin word "nervus," meaning "sinew or tendon."

Anatomy

The masseteric nerve arises from the anterior division of the mandibular nerve. It passes laterally, above the lateral pterygoid muscle, and enters the deep surface of the masseter after passing through the mandibular notch. It is accompanied by the masseteric artery and vein.

Function

The masseteric nerve is responsible for providing motor innervation to the masseter muscle. This muscle is involved in the process of mastication, or chewing, by elevating the mandible against the maxilla.

Clinical Significance

Damage to the masseteric nerve can result in weakness or paralysis of the masseter muscle. This can lead to difficulties in chewing and jaw movement. Conditions such as trigeminal neuralgia can also affect the masseteric nerve, causing severe facial pain.

Related Terms

• Mandibular nerve
• Trigeminal nerve
• Masseter muscle
• Mastication
• Trigeminal neuralgia

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