Light and electron microscopic studies on the medial forebrain bundle in the rat. I. Nerve terminals in the lateral hypothalamus of extrahypothalamic origin.

Degenerated nerve terminals were demonstrated in the lateral hypothalamus of the rat following transection of the rostral and caudal fibres to the medial forebrain bundle (MFB) and a parasagittal cut along the lateral edge of the hypothalamus. In the light of these findings the termination of extrahypothalamic MFB pathways on intrinsic neurons is assumed.