[Lumbosacral part of the dural sac and the topography of its contents].

The course of the fila radicularia in the caudal part of the dural sack is described (Diagram 1, Fig. 1), also the length of the dorsal fila is estimated (f.e. L5 = 138,6 mm), the height of the segments (f.e. S3 = 5,41, S4 = 3,88 mm), the length of the vaginae radiculares (f.e. L5 = 24,6 mm), its angle with the side border of the dural sack (f.e. L5 = 142 degrees) and the distances between the vaginae radiculares (f.e. L4-L5 = 26,67 (21-33) mm). The filum terminale of the spinal cord has a length of 153 (123-178) mm, the filum of the dural sack is 67,8 (48-92) mm long.