The morphological research of the acupoint began from 1977. The scholarshave studied on three main works as following. 1) The sensory organa in the acupoint: The area of acupoint contains freenerve ending

Vater-Pacini corpucleseand muscular spindle. The nerve fibers are I

II

III types

the chief is II. 2) The segmental distributions of afferent neuronal fibers of the acupoint:The evidence of the experimental research has reverled that the fibers of mainlyand essential acupoints are definite to be afferent segmentes. The fibers of theupper and lower limbs acupoints projected into III-IX lamina of

the pesteriorhorn of the spinal cord. 3) The mutual intersect in the dorsal ganglia between the segmental distri-butions of the afferent neurons of viscera and that of acupoints. It is proposed that the mutual intersect between the segmental distributionsof the afferent neurons of viscera and that of the acupoints is probable the morphological foundation for the theory of somato-viscera.