For example, weakness in the deltoid muscle while raising your arms from your sides could indicate a disc herniation at the C4-5 level. These typically occur unilaterally, only on one side of the body, and the specific location of the symptom will vary based on the nerve being compressed. Therefore, a herniated disc in this region that compresses a nerve will produce symptoms in the upper extremity including a sharp shooting or throbbing pain, numbness or tingling, and decreased sensation. Spinal nerves that branch out of the cervical spine control function in the upper extremities (shoulders, arms, and hands). They occur most commonly in the lumbar, cervical, thoracic spinal regions, in that order. Symptoms are based on the spinal region, nerve proximity, and size of the herniation. Disc herniations range from causing no symptoms to causing severe and incapacitating symptoms.
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