Which nerve is not associated with the mandibular nerve branch?

Which nerve is not associated with the mandibular nerve branch?

• A. Infraorbital nerve
• B. Inferior alveolar nerve
• C. Lingual nerve
• D. Mental nerve

Answer: (A)

The main idea is which nerves arise from which division of the trigeminal nerve. The mandibular nerve (V3) supplies sensation to the lower face and mandible and gives several sensory branches: the inferior alveolar nerve (which continues as the mental nerve), the lingual nerve, and the buccal (long buccal) nerve, among others. The infraorbital nerve, however, comes from the maxillary division (V2) and travels through the infraorbital canal to innervate the midface—areas like the lower eyelid, cheek, and upper lip region. Since the infraorbital nerve is a branch of V2, it is not associated with the mandibular nerve. The other nerves listed are classic branches of V3 (inferior alveolar, lingual, and mental), so they are associated with the mandibular nerve.

The main idea is which nerves arise from which division of the trigeminal nerve. The mandibular nerve (V3) supplies sensation to the lower face and mandible and gives several sensory branches: the inferior alveolar nerve (which continues as the mental nerve), the lingual nerve, and the buccal (long buccal) nerve, among others. The infraorbital nerve, however, comes from the maxillary division (V2) and travels through the infraorbital canal to innervate the midface—areas like the lower eyelid, cheek, and upper lip region. Since the infraorbital nerve is a branch of V2, it is not associated with the mandibular nerve. The other nerves listed are classic branches of V3 (inferior alveolar, lingual, and mental), so they are associated with the mandibular nerve.