This diagram shows the connections between the hippocampal formation, mammillary bodies, anterior thalamic nuclei, and neocortex. The fornix connects the hippocampal formation to the mammillary bodies and septal nuclei in the hypothalamus. The mammillothalamic tract connects the mammillary bodies to the anterior thalamic nuclei, which in turn project to the neocortex, parahippocampal gyrus, and cingulate gyrus.

18. Mammillothalamic
Fornix
Mammillary bodies tract
Other hypothalamic nuclei
Septal nuclei
Substantia innominata
(Basal nucleus of Meynert)
Hippocampal Formation
(hippocampus Anterior Thalamic
Neocortex nuclear group
and dentate gyrus)
Parahippocampal Gyrus Cortex of Cingulate Gyrus

22. Mammillothalamic
Fornix
Mammillary bodies tract
Other hypothalamic nuclei
Septal nuclei
Substantia innominata
(Basal nucleus of Meynert)
Hippocampal Formation
(hippocampus Anterior Thalamic
Neocortex nuclear group
and dentate gyrus)
Parahippocampal Gyrus Cortex of Cingulate Gyrus