Clinical Applications of VEPs – Page 3 of 41

With VEPs, the patient is treated as a “black box” and the patient looks at checks (usually black and white) that pattern reverse- white checks to black and black checks to white at a specific reversal rate. The pattern reversal stimulus creates a change across the central retina and this change is transmitted via the optic nerve and visual pathway to the occipital lobe. The response is measured from the back of the head with a surface electrode. (Two other electrodes, one a reference and the other a ground, are also used.)