The incisive nerve is a terminal branch of which nerve?

The incisive nerve is a terminal branch of which nerve?

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

Answer: (A)

The incisive nerve is the anterior continuation of the inferior alveolar nerve as it travels through the mandibular canal. After giving off branches to the posterior teeth, the inferior alveolar nerve continues forward and becomes the incisive nerve to supply the mandibular incisors and canines. The mental nerve is a separate terminal branch that exits at the mental foramen to innervate the chin and lower lip. The other nerves listed originate from different pathways or serve different regions: the lingual nerve supplies the tongue and floor of the mouth; the buccal (long buccal) nerve supplies the cheek mucosa near the molars; the infraorbital nerve comes from the maxillary division and supplies the midface and maxillary teeth and mucosa. Therefore, the incisive nerve originates from the inferior alveolar nerve.

The incisive nerve is the anterior continuation of the inferior alveolar nerve as it travels through the mandibular canal. After giving off branches to the posterior teeth, the inferior alveolar nerve continues forward and becomes the incisive nerve to supply the mandibular incisors and canines. The mental nerve is a separate terminal branch that exits at the mental foramen to innervate the chin and lower lip.

The other nerves listed originate from different pathways or serve different regions: the lingual nerve supplies the tongue and floor of the mouth; the buccal (long buccal) nerve supplies the cheek mucosa near the molars; the infraorbital nerve comes from the maxillary division and supplies the midface and maxillary teeth and mucosa. Therefore, the incisive nerve originates from the inferior alveolar nerve.