fornix

• Its exact functional importance is not clear.

• It is a prominent bundle of axons interconnecting ipsilateral (i.e. same side) regions of certain limbic parts of the forebrain.

• Most of the fibers are axons of pyramidal neurons in the hippocampus which project to the septal nuclei (which is below the septum pellucidum) and to the mammillary nuclei (in the hypothalamus) where they synapse.

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