mammillotegmental fasciculus

ma·mmil·lo·teg·men·tal fas·cic·u·lus

a small bundle of fibers that passes dorsad from the mamillary body for a short distance with the mamillothalamic tract, then turns down the brainstem to reach the dorsal and ventral tegmental nuclei of the mesencephalon.

mammillotegmental tract

The neural tract that connects the mammillary nuclei of the hypothalamus with the dorsal and ventral nuclei of Gudden.