The sense of smell is rarely tested due to the difficulty in objectively quantifying responses, but by presenting common odors (lemon, coffee, vanilla) one can assess the patient's ability to detect an odor or identify it.
(The sense of smell; is tested; due to the difficulty in objectively quantifying responses; T:rarely) (one; can assess; the patient's ability to detect an odor or identify it)
The sense of smell one
is tested can assess
due to the difficulty in objectively quantifying responses T:rarely
the patient's ability to detect an odor or identify it