Radiculitis causes painful, motor and vegetative disturbances caused by the affection of the spinal cord roots owing to osteochondrosis. Osteochondrosis is a degenerative-dystrophic process resulting from the loss of the cushion function by the intervertebral disks. This is caused by the degeneration of the disk tissue resulting in decreased pressure within the disk. Except for traumas, aetiology of discopathies is unknown. There is relative backbone instability in the segment accommodating the affected disk. The disease promotes the development of osteophytes (spondylosis), affects ligaments and causes arthropathy of the intervertebral joints (spondylarthrosis). Disk diverticula (a protrusion or a hernia) and osteophytes may compress the roots causing radicular pains. Besides, both local and irradiating pains may be provoked by the backbone's affected tissue proper. The pain may be directly caused by lifting something heavy, an angular movement, cold, negative emotions, infections, etc. At least 95 percent of all cases dealing with lumbosacral and a cervical radiculitis are caused vertebral osteochondrosis, while radiculopathies, as a rule, are provoked by a mechanical or compression factor. The pain syndrome can also be prompted by local neurodystrophic changes in tendons, ligaments and muscles. These factors are especially salient in case radiculitis is accompanied by contractions of separate muscles. The first lumbar and cervical attacks are apparently caused by a rupture of the disk's fibrous ring and lesion of the intervertebral joints' capsules. This mainly affects the vegetative innervation, the pain being diffuse in nature (lumbagos, myosites). The radicular syndrome itself develops only in case of hernia compressing the root. The form of the spinal column suggests that it is the lower-cervical, low-thoracic and lower-lumber departments that bear the main burden. Therefore, the clinical picture reveals the compression of the roots primarily at these levels.