inferior alveolar nerve (sometimes called the inferior dental nerve) is a branch of the mandibular nerve, which is itself the third branch (V3) of the trigeminal nerve ( cranial nerve V).
Before traversing the
mandibular foramen, it first gives off the nerve to the mylohyoid, a motor nerve supplying the mylohyoid and the anterior belly of the digastric. It then enters the mandible via the mandibular foramen.
While in the
mandibular canal within the mandible, it supplies the mandibular (lower) teeth (molars and second premolar) with sensory branches that form into the inferior dental plexus and give off small gingival and dental nerves to the teeth.
Anteriorly, the nerve gives off the mental nerve at about the level of the mandibular 2nd premolars, which exits the mandible via the mental foramen (supplying sensory branches to the chin and lower lip).
The inferior alveolar nerve continues anteriorly as the
mandibular incisive nerve to innervate the mandibular canines and incisors.
Anesthesia [ edit ]
Administration of anesthesia near the mandibular foramen causes blockage of the inferior alveolar nerve and the nearby
lingual nerve (supplying the tongue). This is why the numbing of the lower jaw during dental procedures causes patients to lose sensation in:
Additional images [ edit ]
Mandible of human embryo 95 mm. long. Inner aspect. Nuclei of cartilage stippled.
Mandibular division of trifacial nerve, seen from the middle line.
Mandibular nerve and bone. Deep dissection. Anterior view.
Infratemporal fossa. Lingual and inferior alveolar nerve. Deep dissection. Anterolateral view
References [ edit ]
External links [ edit ]