The nurse is assessing the integrity of the sensory system in the client's upper extremities. She ...

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A test for stereognosis occurs when the examiner places a small familiar object, such as a key, paper clip, or coin, in the client's palm; the client manipulates the object and correctly identifies it.
A test for graphesthesia is conducted when the examiner uses a blunt object to draw a number or letter on the client's palm. The client is asked to identify it.
Discriminative sensation encompasses three tests of fine touch, which require a higher level of sensory cortex function because clients must analyze and interpret the stimulus with their eyes closed.
A test for extinction occurs when the examiner touches both arms in symmetrical places at the same time. The client reports that two places were touched and identifies the locations.