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39.7 Figures 18 A, B and C show the peripheral nerves running from the spinal chord to the arms and legs and the blood vessels around the spine. Figures B and C show the nerve roots.
39.8 Spinal cord compression can occur by any pathological process which causes the internal dimensions of the intervertebral foramen including osteophytes, tumour or spondylolisthesis. Nerve root compression may arise at any point along the course of a spinal nerve and/or the intervertebral foramen, for instance by osteophytes or bony spurs projecting posteriorly of anteriorly from the facet joint or from direct pressure from a prolapsed or extruded disc.
40 Dermatomes and Myotomes
40.1 The spinal nerve roots are split into segments. This causes recognised patterns of innervation [nerves going into things] of skin and muscles from each segment.
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