ventral supraoptic decussation ventral supraoptic decussation the ventral supraoptic decussation is the crossover (decussation) point for signals from the left and right eye, en route respectively to the right and left sides of the visual cortex. ventral supraoptic decussationscheme showing central connections of the optic nerves and optic tracts. (commissure of gudden labeled at center right.)detailsidentifierslatincommissura supraoptica ventralisneuronames389neurolex idbirnlex_1347ta98a14.1.08.959ta25761fma62052anatomical terms of neuroanatomy occupying the posterior part of the commissure of the optic chiasma is a strand of fibers, the ventral supraoptic decussation (commissure of gudden, gudden's inferior commissure), which is not derived from the optic nerves; it forms a connecting link between the medial geniculate bodies.