Cervical Spine Disc Disease & Cervical Myelopathy
Categorization By Odom et al
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Unilateral soft disc protrusion |
Nerve root compression /radiculopathy |
Osteophytes /hard disc |
Nerve root compression /radiculopathy |
Medial soft disc protrusion |
Spinal Cord compression / myelopathy |
Cervical spondylosis |
Spinal Cord compression/ myelopathy |
Cervical Radiculopathy
Definition
A condition caused by compression of a nerve root in the cervical spine
Incidence
Annual incidence is 83.2 per 100000 population (reported in 1994 by Radhakishran, Minnesota, 1994)
Age - Not common in under 30s. Most common in 40s and 50s. Cervical degeneration tends to begin 10 years later than lumbar spine degeneration
Sex - F:M = 3:2
Pathology
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Lateral Disc herniation approx. 50% (soft disc)
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Osteophyte formation in Lushka (intervertebral body joint or facet joint approx. 50% (hard disc)
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Only 5% also have developmental spinal stenosis (AP diameter of spinal canal of 12mm or less)
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Compression occurs mostly at the entrance or just medial to the foramen where the nerve roots pass ventrally to the superomedial edge of the superior articular process. Occasionally a herniated disc will migrate into the intervertebral foramen
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Frequency of nerve root compressed C7>C6>C8>C5
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