 Limbic leucotomies continued to be performed at Atkinson Morley's Hospital until 1999.Multifocal electroleucoagulation, in which white matter is gradually destroyed by passing electric current through electrodes implanted in the frontal lobes, was the invention of doctors at the Burden Neurological Institute in 1959.Ten sheaths, each containing six or seven electrodes, were implanted in the brain and connected to a socket on the head.