On the vaso-motor nerves supplying the stomach, the intestines, the colon, the spleen, and the kidneys

I made some experiments on toads (Bufo japonicus) for the purpose of the studying vaso-motor nerves supplying the stomach, the nitestines, the colon, the spleen, and the kidneys. These experiments were the followong; Method. I introduced Ringer's solution under constant pressure into one of the above mentioned organs through the vessels which supply it. The vessls going to other organs were completely ligatured. By this precaution the amount of Ringer's solution flowing out from the vein is made to imdicate the width of the perfused vessels. Then their nerves were stimulated by pinching or induction current. The results wer marked by recording the number of drops. 1) All vaso-motor nerve fibers leave the spinal cord through the anterior roots. 2) The vaso-motor nerve fibers going the stomach are found in the anterior roots of the 3rd, 4th, 5th, and 6th spinal nerve. These fibers passing through the 4th, 5th and 6th sympathetic ganglion concentrate in the soral ganglion passing through it and innervate to the stomach. As a rule, in the 4th spinal nerve the most vaso-motor nerve fibers are found, but are sometimes distributed over the 3rd and 5th. 3) The vaso-motor nerve fibers going to the intestine and the colon are found in the anterior roots of the 3rd, 4th, 5th, and 6th spinal nerve. These fibers passing through the 4th, 5th, and 6th sympathetic ganglion concentrate in the soral ganglion passing through it and innervate the intestine and the colon. As a rule, in the 3rd and 4th spinal nerve the most vaso-motor nerve fibers are found. 4) The vaso-motor nerve fibers going to the spleen are found in the anterior roots of the 3rd and 4th spinal nerve. These fibers passing through the 4th, 5th and 6th sympathetic ganglion concentrate in the soral ganglion passing through it and innervate the spleen. 5) The vaso-motor nerve fibers going to the kidney are found in the anterior roots of the 3rd, 4th, 5th, 6th, and 7th spinal nerve. These fibers passing through the 6th, 7th, 8th, and 9th, sympathetic ganglion, and innervate the kidney. As a rule, in the 6th spinal nerve the most vaso-motor nerve fibers are found.

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