The terminal nerve, also known as cranial nerve zero or simply as CN 0, is a nerve that was not included in the seminal classification of the cranial nerves as CN I through CN XII, but has since been recognized and listed in TA2.[1] It was discovered by German scientist Gustav Fritsch in 1878 in the brains of sharks, and was first found in humans in 1913.[2]
Studies have confirmed that the terminal nerve is a common finding in the adult human brain.[3][4]
The accepted name of terminal nerve is due to its entrance in the lamina terminalis regions.[1] The nerve has previously been called cranial nerve XIII, zero nerve, nerve N, and NT.[5][6]