Measurement of the client's ability to differentiate between sharp and dull sensations over the forehead tests which cranial nerve?

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The trigeminal nerve is tested by lightly touching the cornea with a wisp of cotton,by assessing the corneal reflex,and by measuring sensation of light pain and touch across the skin of the face.The optic nerve is tested by using the Snellen chart or asking the client to read printed material.The facial nerve is tested by having the client smile,frown,puff out cheeks,and raise and lower eyebrows while looking for asymmetry.Also,having the client identify salty or sweet taste on the front of the tongue tests the facial nerve.The oculomotor nerve is tested by assessing directions of gaze and testing papillary reaction to light and accommodation.

Measurement of the Client's Ability to Differentiate Between Sharp and Dull