Caudal raphe nuclei

The 5-HT1A receptors are coupled to potassium and calcium channels. Intracellular current-clamp recordings in slices containing the DR established that the 5-HT-mediated inhibition involved an increase in potassium conductance, which exhibits inward rectification (18,58). This induced a membrane hyperpolarization leading to a decrease in action potential frequency. Similar responses to 5-HT1A receptor activation have been reported in other neuronal types, such as hippocampal pyramidal cells (16,59) or 5-HT neurons of the caudal raphe nuclei (60). 

B8 Caudal linear nucleus B3 Nucleus Raphe magnus... 

PnC pontine reticular nucleus, caudal part 56-61, 80-82, 90-95 PnO pontine reticular nucleus, oral part 49-55, 81-83, 91-98 PnR pontine raphe nucleus 54-57, 79, 95-97 PnV pontine reticular nucleus, ventral part 56-60, 79-81, 90 Po posterior thalamic nuclear group 30-38, 83-85, 103-109 PoDG polymorph layer of the dentate gyrus 30-45, 80, 82, 86, 88, 98-115... 

Cl adrenaline cells Cl C2 adrenaline cells C2 C3 adrenaline cells C3 caudal interstitial nucleus of the medial longitudinal fasciculus Cl caudal linear nucleus of the raphe CLi caudal periolivary nucleus CPO caudate putamen (striatum) CPu caudoventral respiratory group CVRG caudoventrolateral reticular nucleus CVL cell bridges of the ventral striatum CB central amygdaloid nucleus, capsular part CeC... 

Bj Raphe pallidus nucleus Caudal ventrolateral medulla... 

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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