La constitution des branches postérieures des nerfs rachidiens.

: By opposition to the anterior branches of spinal nerves which are constituted by motor, sensitive and autonomic fibers, some of the posterior branches have not or have few of sensitive territory: C1, C5, C6, C7, D1, L4, L5 are like that. This particularity ought to be reflected in their histogram. In a first analyse authors study number of fibers, in a second their caliber.