Spondylosis is the most common disease to affect the cervical spine and its contents in the geriatric age group. It has been estimated that 75% of persons over the age of 50 have narrowing of the spinal canal or intervertebral foramina, and 50% of these cases are symptomatic.1 With advancing years the number with positive symptomatology increases until an incidence of 75% is reached in persons over the age of 65. The clinical manifestations are protean but, in essence, comprise syndromes representing nerve root irritation or compression, myelopathy, or a combination of both.2-6 To this may be added the signs of cerebral ischemia produced by spondylotic distortion of the vertebral artery during movement of the cervical spine.7
All anatomical and pathological studies have demonstrated a narrowing of the spinal canal or neural foramina by partial posterior displacement of the intervertebral disk with marginal lipping and the
ROSOMOFF HL, ROSSMANN F. Treatment of Cervical Spondylosis by Anterior Cervical Diskectomy and Fusion. Arch Neurol. 1966;14(4):392–398. doi:10.1001/archneur.1966.00470100048006
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