Which is true of examination of the olfactory nerve?
A) It is not tested for laterality.
B) The smell must be identified to declare a normal response.
C) Abnormal responses may be seen in otherwise normal elderly.
D) Allergies are unrelated to testing of this nerve.
C) Abnormal responses may be seen in otherwise normal elderly.
Abnormal olfactory nerve examination findings may be seen in otherwise normal elderly but may also be associated with other conditions such as Parkinson's disease. You should try to determine if only one side is abnormal by occluding the contralateral nostril. The smell must only be detected, not identified by name, to indicate a normal examination. If nasal occlusion occurs for other reasons, such a allergic rhinitis or anatomic abnormalities, the nerve cannot be tested and may seem to be abnormal for unrelated reasons.
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