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.
lobotomy A lobotomy is a surgical procedure that interrupts the nerves in the brain. Before the use of prescription drugs became wide-spread, a common treatment for severe mental illness was lobotomy. The lobotomy was invented in 1935 and used fairly regularly for about twenty years to treat psychosis and other mental illnesses. It was always controversial, and once effective anti-psychosis medications were developed, it fell out of use. Lobotomy results in a calmed, but also often mentally dull patient.