NEET PG DENTAL EXAM

BRAIN

CRANIAL NERVES

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

Which cranial nerve(s) is assessed with shrugging shoulders against resistance?

A	Glossopharyngeal (CN IX) & Vagus (CN X)
B	Spinal Accessory (CN XI)
C	Optic (CN II)
D	Trigeminal (CN V)

Explanation:

Detailed explanation-1: -Examination of the accessory nerve involves assessing two muscles: the trapezius and sternocleidomastoid . When assessing the trapezius, ask the patient to shrug their shoulders, then apply resistance. Accessory nerve weakness will present with weak or no resistance to your downward force.

Detailed explanation-2: -Answer and Explanation: The answer is c, spinal accessory nerve, also known as cranial nerve XI. The actions of shrugging the shoulders and turning the head can be performed by the upper fibers of the trapezius and the sternocleidomastoid muscles, respectively.

Detailed explanation-3: -The muscles innervated directly by the XI nerve are the trapezius and the sternocleidomastoid, in addition to the laryngeal musculature (in collaboration with the vagus nerve), such as the palatal, pharyngeal, laryngeal muscles.

There is 1 question to complete.