Rostral raphe nuclei

Figure 6.1. Main serotonergic pathways in the human brain. The higher centres of the brain are innervated by the serotonergic tracts originating from the rostral raphe nuclei while the cerebellum and spinal cord are innervated from tracts originating...

Pinnock RD, Reynolds T, Woodruff GN (1994) Different types of bombesin receptors on neurons in the dorsal raphe nucleus and the rostral hypothalamus in rat brain slices in vitro. Brain Res 653 119-124. 

Large cells are prominent in the rostral part of the medial nucleus, small cells predominate in its ventromedial and caudal parts (Flood and Jansen, 1961). The lateral border of the medial nucleus is flush with the AChE-positive raphe which forms the lateral border of the medial A-compartment of the anterior vermis. AChE is concentrated in the lateral and ventral parts of the medial nucleus and in the neuropil of cell groups scattered in between the medial and the anterior interposed nucleus. Caudally these AChE-positive clusters coalesce in a U-shaped nucleus located at the transition of the medial and the posterior interposed nucleus (Fig. 104B). The medial limb of the U forms the lateral border zone of the fastigial nucleus, the lateral limb usually is included with... 

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