Dynamic topography of the human short latency visual

Abstract

Topographic analysis of the very early components of visual evoked potentials was carried out to demonstrate a visual conduction from the retina to the visual cortex through the brainstem. These potentials are called short latency visual evoked potentials (SVEP). In SVEP, at least four oscillatory potentials of the retina project a weak negative firing for the optic nerve and the brainstem four times, respectively, during a 20 msec to 55 msec period. Subsequently, the first occipital response appeared at 40 msec and the second one at 65 msec. Consequently, three groups of responses such as the retinal potentials, the optic pathway and brainstem potentials, and the occipital potentials were detected in human SVEP.

Key Words:

• short latency VEP
• dynamic topography
• retinal potentials
• brainstem potentials
• visual cortex potentials