PT - JOURNAL ARTICLE AU - R S Boyle AU - R A Shakir AU - A I Weir AU - A McInnes TI - Inverted knee jerk: a neglected localising sign in spinal cord disease. AID - 10.1136/jnnp.42.11.1005 DP - 1979 Nov 01 TA - Journal of Neurology, Neurosurgery & Psychiatry PG - 1005--1007 VI - 42 IP - 11 4099 - http://jnnp.bmj.com/content/42/11/1005.short 4100 - http://jnnp.bmj.com/content/42/11/1005.full SO - J Neurol Neurosurg Psychiatry1979 Nov 01; 42 AB - Two cases are described in which inversion of the quadriceps jerk was observed. It is suggested that the finding of an inverted quadriceps jerk is evidence of a spinal cord lesion at 12, 3, 4 segmental level and has for the lumbar cord the same localising value as the inverted supinator jerk for the cervical cord.