Nine typs of mechanoreeceptors of hair skin in 46 rabbits were identified by recording discharges of single afferent fiber in posterior femoral cutaneous nerve from fine filaments by" dissection. When seven manipulations

i.c.lift and thrust

twist and twirl

rotate

serape

flike the needle and finger-pressure were used to stimulate each receptor

their responsive discharges were observed

Data at 165 units were collected totelly

89 units in which were for the relatiou between manipulations and discharge patterns

and the other 76 units for discharges responding to mauipulations at different distances from the receptive field. Nine types of receptors having been observed are able to responde to any acupuncture manipulatins

it is thus clear that there is not any special "acupucture receptor." Same kind of discharge pattern existed in different types of receptor when stimulated by the same acupuacture manipulation

whereas clifferenct discharge patterns can be found at the same unit when the manipulation changed.We belive that it is due to the movement form

force amount and time duration of the manipulations. Receptors responding to acupuncture were not limited to one point only

but involving a certain field surrounding the needle point.The size of this field varied with the types of receptors and kinds of manipulations. Our previous articles had reported that the acupuncture photograph leading from nerve and building on impulses induced by acupuncture and the groups of afferent fibers conducting acupuncture signals changed with different manipula- tions

in this paper the reasons for that have been expounded by presenting the relationship between the responsive discharges of receptors and the manipulations The significance of revealing the relation between acupuncture manipulations and systems for the research of acupuncture mechanisms and to advance the acupuncture manipulations is discussed properly

and point out in the meantime that there have with substantial scientific contents within the acupuncture manipulations which was payed great attention by our ancients.