Neurologia2016: POTENCIALES EVOCADOS

Evoked potentials studies involve three major tests that measure response to visual, auditory, and electrical stimuli.

Visual evoked response (VER) test. This test can diagnose problems with the optic nerves that affect sight. Electrodes are placed along your scalp and the electrical signals are recorded as you watch a checkerboard pattern flash for several minutes on a screen.
Brainstem auditory evoked response (BAER) test. This test can diagnose hearing ability and can point to possible brainstem tumors or multiple sclerosis. Electrodes are placed on your scalp and earlobes and auditory stimuli, such as clicking noises and tones, are delivered to one ear.
Somatosensory evoked response (SSER) test. This test can detect problems with the spinal cord as well as numbness and weakness of the extremities. For this test, electrodes are attached to your wrist, the back of your knee, or other locations. A mild electrical stimulus is applied through the electrodes. Electrodes on your scalp then determine the amount of time it takes for the current to travel along the nerves to the brain