[A method for an approach to the spinal cord]

The apices of the spinous processes of the fourth-sixth vertebrae are exposed by means of a posterior median incision, the fascia and muscles are cut off, subperiosteally their lateral surfaces are isolated followed by the posterior surfaces of the arches, and the muscles are taken aside. The arches are cut towards the inside from the articular processes on the oblique-frontal plane. According to the indication a pi-shaped cut is made on the yellow ligament to make a flap with a base either upwards or downwards exposing the spinal cord. An H-shaped dissection of the mobilized posterior wall of the vertebral canal forms two pi-shaped flaps, while a C-shaped cut forms a flap having a wide base on one side. After the operation the flaps are put back to their places, the arches are fixed by perosseous sutures or by other means. The ligaments are sutured. The muscles are put upon the arches and sutured. The sutures are put onto the fascia and skin. In the postoperative period the motility of the operated part of the vertebral column recovers.