Our results suggest that the origins of the serotoninergic fibers in L6 and S1 seginents may be extensive,not only from the reticular formation of medulla oblongata but also from reticular formation of pons and nucleus of cerebral nerve.

• 提示L6和S1节段的5－HT传入纤维起源是广泛的，不仅延髓网状结构，而且脑桥网状结构和脑神经核内的5－HT能神经元也向L6和S1投射。