Start practicing

Oral Surgery · single question

The motor nerve of V3 (mandibular division of trigeminal nerve) supplies which muscle?

  1. Platysma
  2. Sternocleidomastoid
  3. Mylohyoid
  4. Trapezius
Show answer and explanation

Correct answer: C. Mylohyoid

  • A. Platysma is innervated by the cervical branch of the facial nerve (CN VII), not V3.
  • B. Sternocleidomastoid is innervated by the accessory nerve (CN XI) and cervical plexus.
  • C. Correct. The mylohyoid nerve (from V3/inferior alveolar nerve) is the primary motor branch of V3. It innervates the mylohyoid muscle and the anterior belly of the digastric muscle.
  • D. Trapezius is innervated by the accessory nerve (CN XI) and cervical plexus.

Practice Oral Surgery questions Oral Surgery study notes

More Oral Surgery practice questions