CN XII Tongue Motor — FRCA Primary MCQ
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Correct answer: E — All intrinsic and most extrinsic muscles of the tongue
CN XII innervates all intrinsic tongue muscles and all extrinsic tongue muscles except palatoglossus (which is innervated by the vagus/pharyngeal plexus). Unilateral hypoglossal nerve palsy causes the tongue to deviate towards the affected side on protrusion (due to unopposed action of the contralateral genioglossus).
Reference: RCoA 2021 Primary FRCA Curriculum