INBDE (Integrated National Board Dental Examination) Practice Exam

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What nerve carries special sensory innervation to the anterior 2/3 of the tongue?

Hypoglossal nerve
Chorda tympani via VII
Lingual nerve
Facial nerve

The correct answer is: Chorda tympani via VII

The hypoglossal nerve (A) carries motor innervation to the muscles of the tongue, not sensory innervation. The lingual nerve (C) carries general sensory innervation to the anterior 2/3 of the tongue, but not special sensory innervation. The facial nerve (D) carries taste sensation from the posterior 1/3 of the tongue, but not from the anterior 2/3. The chorda tympani nerve (B) is a branch of the facial nerve that specifically carries special sensory innervation for taste to the anterior 2/3 of the tongue, making it the correct answer.