RT Journal Article SR Electronic T1 Motor neuron disease. JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 886 OP 896 DO 10.1136/jnnp.57.8.886 VO 57 IS 8 A1 P N Leigh A1 K Ray-Chaudhuri YR 1994 UL http://jnnp.bmj.com/content/57/8/886.abstract AB