Pretectal area

The pretectal area or pretectal area is a part of the midbrain. It is immediately adjacent to the superior colliculus and the nuclei contains pr ( a) etectales.

The pretectal area is included in the interconnection of the pupillary light reflex. She gets through the optic nerve and optic tract afferents from the retina, which travel along Brachia colliculorum Superiorum to pretectal area. The efferent drag to equilateral and the posterior commissure to the contralateral Edinger - Westphal nucleus. The fact that the Edinger - Westphal nuclei of both sides to achieve it comes to consensual pupillary light reflex, so both pupils to constrict when exposed to light in one eye only.