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Medical Term:

pretectal area


Definition: a narrow, transversely oriented rostral zone of the mesencephalic tectum, bounded caudally by the superior colliculus, rostrally by the habenular trigone, and laterally by the pulvinar thalami; the pretectal area contains several nuclei that receive fibers from the optic tract; it has bilateral efferent connections with the Edinger-Westphal nucleus of the oculomotor nuclear complex by way of which it mediates the pupillary light reflex.

Synonym(s): pretectal region, pretectum

© Copyright 2016 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.