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.
Freeman wanted to find a technique that was faster, more accessible and less expensive, so he decided to get to the prefrontal cortex through the eye sockets instead. Freeman first practiced on cadavers using an ice pick, which is how his method came to be known as the ice pick lobotomy.. When he began performing the transorbital lobotomy on patients, he used a stronger version of a leucotome that resembled an ice pick, called an orbitoclast.