Nervus pterygoideus externus

Nervus pterygoideus externus

The Nervus pterygoideus externus is a branch of the mandibular nerve (V3) that provides sensory innervation to the temporalis muscle and the masseter muscle. It is also known as the external pterygoid nerve.

Anatomy

The Nervus pterygoideus externus originates from the main trunk of the mandibular nerve within the pterygopalatine fossa. It then descends along the lateral surface of the lateral pterygoid muscle and gives off branches to innervate the temporalis and masseter muscles.

Function

The main function of the Nervus pterygoideus externus is to provide sensory innervation to the temporalis and masseter muscles. It carries sensory information from these muscles back to the brain, allowing for proprioception and coordination of jaw movements.

Clinical Significance

Injury or compression of the Nervus pterygoideus externus can result in sensory deficits in the temporalis and masseter muscles. This can lead to difficulties in chewing, jaw movement, and overall oral function. It is important for healthcare professionals to be aware of this nerve and its potential implications in order to properly diagnose and treat any related conditions.

See Also

• Mandibular nerve
• Temporalis muscle
• Masseter muscle