Sciatica is pain, tingling, or numbness produced by an irritation of the nerve roots that lead to the sciatic nerve.The sciatic nerve is formed by the nerve roots coming out of the spinal cord into the lower back. It goes down through the buttock, then its branches extend down the back of the leg to the ankle and foot.ciatica is pain, tingling, or numbness produced by an irritation of the nerve roots that lead to the sciatic nerve.
prefrontal lobotomy - surgical interruption of nerve tracts to and from the frontal lobe of the brain; often results in marked cognitive and personality changes. frontal lobotomy, leucotomy, leukotomy, lobotomy, prefrontal leucotomy, prefrontal leukotomy.
The more common form of a lobotomy is the Transorbital L â¦ obotomy, a procedure in which the frontal lobe is scrambled with an icepick inserted without incision through the eye sockets and then moved around in the brain so as to cut off any neurological connection to and from that region of the brain. a neurosurgical procedure, a form of psychosurgery, also known as a leukotomy or leucotomy (from Greek leukos: clear or white and tomos meaning cut/slice). It consists â¦ of cutting the connections to and from the prefrontal cortex.