Inferior alveolar nerve

he inferior alveolar nerve or inferior dental nerve is a mixed sensory and motor branch of the posterior division of the mandibular division of the trigeminal nerve in the pterogomandibular space of the oral cavity.

Gross anatomy

The inferior alveolar nerve divides off the posterior division and descends posterior to the lingual nerve, deep to 
lateral pterygoid muscle and lateral to the pterygomandibular raphe, between the sphenomandibular ligament and the 
ramus of the mandible. It enters the mandibular foramen anterior to the inferior alveolar artery and vein. Just before entering the mandible, it gives of a motor branch, the nerve to myelohyoid. In the mandibular canal, the nerve gives off small twigs to the mandibular molar and premolar teeth. It then terminates in the mandibular canal by dividing into two branches:

Variant anatomy

Some authors document the mental nerve carrying parasympathetic fibres from the otic ganglion to the labial glands of the lower lip.


Head and neck anatomy
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Article Information

rID: 51641
System: Head & Neck
Section: Anatomy
Synonyms or Alternate Spellings:
  • inferior dental nerve

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