Once the incision is made, bone is removed and the brain is exposed, the patient's sedation is lightened in order for the patient to communicate with the surgeon or speech therapist.
The patient is needed to be awake in surgeries that require working on parts of the brain that control speech and motor function. Therefore, the patient is usually awake as the surgeon stimulates and tests those areas before working on them. If stimulation of those areas results in speech arrest or paralysis (where patient is unable to talk during the surgery or move a limb), the surgeon would avoid those areas
Sciatica symptoms which often cause pain that is often described as sharp, electric, throbbing or painful numbness, occur when the large sciatic nerve is irritated or compressed at or near its point of origin. This can be due to a herniated disc, spinal stenosis (narrowing of the spinal canal), degenerative changes, spondylisthesis (small stress fracture or congenital bone insufficiency that allow one vertebral body to slip forward on another), Piriformis syndrome (muscle irritation of the sciatic nerve), Sacroiliac joint dysfunction, and other causes.
However, fusing the top vertebrae (C1 and C2), a patient loses over half of their neck rotation component