抄録
1) It is directly demonstrated with a new “glycerine spot method” (1952, Kotsuka)and the nicotine method that “sympathicus via posterior roots” (Kotsuka) are the efferent vasodilator nerves in the blood vessels in bullfrog's and frog's external eye muscles.
These efferent vasodilator nerves are found
1. to pass through the posterior root (II)
2. to make a cell station at the spinal ganglion (II)
3. to pass through the sympathetic chain, and reach the blood vessels in the external eye muscles with the sympathicus via anterior roots (Langley).
2) It is revealed with a new “glycerine spot method” that the sympathicus via anterior root (II) (Langley) are possessed with a vasoconstricting action in the blood vessels of bullfrog's and frog's external eye muscles.
3) It is interpreted that the blood vessels of bullfrogs and frogs external eye muscles are subjected to “sympathetic double innervation”.
