RT Journal Article SR Electronic T1 NEUROLOGICAL PATHOPHYSIOLOGY JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 101 OP 101 DO 10.1136/jnnp.40.1.101-a VO 40 IS 1 A1 J. P. Ballantyne YR 1977 UL http://jnnp.bmj.com/content/40/1/101.2.abstract AB