[Dyssymmetry of the external structure of the human spinal cord: radicular bases and segments (a morphometric study)].

In 101 preparations of spinal cords obtained from persons of various age, dyssymmetry in level position and extent of the radicular bases, interradicular spaces on the right and left halves of the spinal cord segments has been studied macro- and microscopically. Quantitative treatment of the results obtained has demonstrated that certain elements of asymmetry in structure of the human spinal cord are revealed already in fetuses; with age, the dyssymmetry in the right and left halves of the segment increases. Indices of dyssymmetry are especially large at the level of the thoracic segments and on the posterior surface of the spinal cord.