近年来

随着对针刺镇痛原理的深入研究

发现海马在针刺镇痛过程中起一定作用。神经生理学实验证明:刺激大鼠背侧海马可提高针刺镇痛效应

损毁背侧海马电针镇痛效应降低;刺激双侧海马可提高痛反应域

并可加强电针效应。对于海马的传入联系前人曾用溃变方法做了大量工作

近年来segal和阪中等先后用HRP逆行传递法进行了研究

但结果不尽The afferent connections of the hippocampus in the rat were examined by means of a retrograde axonal transport method of horseradish peroxi- dase (HEP). During injections of HRP in the dorsal or ventrolateral hi- ppocampus

labeled areas did not show any difference

except for the me- dial septal nucleus. Numerous labelled cells were consistently found in the ipsilateral medial septal nucleus

the diagonal band nucleus

the entorhinal cortex

the posterior hypothalamic nucleus

the supramammillary area

the supraoptic area and

bilaterally

the lateral hypothalamus area. when in- jections were made into the dorsal hippocampus

HRP-labelled cells of the medial septal nucleus were observed in medial aspect

but injections made into the ventrolateral hippocampus

revealed HRP-labelled cells of the me- dial septal nucleus in the lateral aspect. After injection into the hippoca- mpus

the supraoptic area was labelled

as first reported. The many areas above-mentioned have a relations with acupuncture analgesia

it is proba- ble that the hippocampus is one of the centres regulating pain in the cent- ral nervous system. Hippocampal function therefore requires further inve- stigation.