Blood Supply of the Trigeminal Ganglion of the Dog

抄録

The author has investigated the arterial distribution of the trigeminal ganglion in the dog by means of the acryl plastic injection method, and additionally the basic structure and topographical relations of the ganglion.
1. Most of the ganglion was located in the impressio trigemini on the base of the greater wing of the sphenoid bone, and a small, posterolateral part of it extended in the major petrosal nerve canal hiatus of the temporal bone.
2. Ganglionic branches arose from the following vessels; the petrosal branch, the anastomotic ramus, the anastomotic artery, the middle meningeal artery, the accessory meningeal branch and the internal carotid artery, in order of the frequency. Of them, the first and the second were the main blood supply route, and the middle meningeal assisted it.
3. Ganglionic branches from various sources ramified into small arterial vessels, by some of which the supraganglionic and infraganglionic retia were formed in the capsule of the ganglion, and the others of which entered the ganglion from the forks between three divisions. Finally they spread into capillary networks, in one mesh of which one or two nervous cells were held.
In conclusion, the main route of the blood supply of the trigeminal ganglion in the dog was the extracranial blood source and in assistance of the intracranial. Communicating channels between both sources, the internal and external carotid systems, were the anastomotic ramus and artery as well as lots of multisource ganglionic branches.