An EPS enables us to -

Evoked potential studies are conducted to study the electric signals that are generated to different senses of the body such as touch, vision, smell, etc.
This test is mainly conducted to know the sensory neurological problems and as a diagnostic test in some brain diseases.
It is also used to conduct in diagnosing some vision and hearing problems in children especially.
The electric signals which are generated here have very less range that are less than microvolts.
The test conducting by using the electrodes, it is painless procedure where the patient in which test should be done make to lie on bed and one electrode is attached to the scalp, and other is attached to the part where it is to be tested, and the stimulus is made, normal people get the electric signals instantaneously, if it is not happen, then any underlying disease might be there.