No changes necessary. No changes necessary. No changes necessary. Remove all jewelry and metal objects before the test. Needle electrodes cause mild, temporary pain when inserted.
Discomfort disappears when the test is finished.
Equipment used Evoked potential unit. Auditory, visual or touch stimuli. Description of test You are positioned in a reclining chair or on a bed. If visual evoked potentials are measured, electrodes are attached to your scalp. Electrodes will not hurt you.