Which of the following reflexes test the integrity of nucleus ambiguus: (A) Jaw jerk, (B) Stapedial reflex, (C) Gag reflex, (D) Corneal reflex
Answer is C. Nucleus ambiguus involves cranial nerves 9th, 10th & 11th . It involves the nerve supply to soft palate , larynx & pharynx which is involved in speech & swallowing. Gag reflex: Contraction of the constrictor muscle of the pharynx elicited by touching the back of the pharynx.