抄録
The values of accommodation constant, λ, of the toad nerve were measured by exponentially increasing current method and anodal break excitation method. When the nerve is intact, the value of λ measured by the increasing current method was as follows :
276.295±219.464 msec...
To stimulate the nerve by anodal breaking shock, one must crush the interpolar region of it, to eliminate the cathodal making effect. Under such condition the value of λ obtained was :
14.05±6.46 msec...
This value is strikingly smaller than that obtained by the increasing current method in the intact nerve. But the value of λ measured by the increasing current method was also small, if the nerve was crushed as above mentioned. If the nerves are under the same condition the values of λ obtained by the two different methods coincide well each other. This fact favours Hill's theory. The value of A decreases when the nerve is blocked by crushing the portion between anode and cathode. Up to the present, the abovementioned phenomenon can not be explained.
