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Fig. 41-4. The spinal cord and cauda equina in situ. posterior aspect, made visible by a laminectomy on the right-hand side. The dorsal rami are omitted. The intervertebral discs are shown in blue. It can be seen that prolapse of disc L4/5, for example, would be likely to damage L5 roots. (Based partly on Pernkopf.) Click for high resolution image.