The mandibular nerve, a branch of the trigeminal nerve, controls the jaw.
The mandibular nerve (cranial nerve V3) is responsible for both sensory and motor functions in the lower face. Specifically concerning the jaw, it provides motor innervation to the muscles of mastication, which are essential for chewing.
These muscles include:
- Masseter: Elevates the mandible (closes the jaw).
- Temporalis: Elevates and retracts the mandible.
- Medial pterygoid: Elevates the mandible and assists in lateral movements.
- Lateral pterygoid: Depresses and protrudes the mandible, also assists in lateral movements.
Therefore, any damage or dysfunction of the mandibular nerve can lead to difficulties in chewing, speaking, and other jaw movements.
