%0 Journal Article %A R J Butler %A W I Forsythe %A D W Beverly %A L M Adams %T A prospective controlled investigation of the cognitive effects of amateur boxing. %D 1993 %R 10.1136/jnnp.56.10.1055 %J Journal of Neurology, Neurosurgery & Psychiatry %P 1055-1061 %V 56 %N 10 %X Eighty six amateur boxers underwent a series of neuropsychological assessments on three occasions--pre bout, immediate post bout and follow up within two years; 31 water polo players and 47 rugby union players acted as controls. The neuropsychological tests were selected as being sensitive to subtle cognitive dysfunction and formed part of a battery of other neurological and ophthalmic assessments. No evidence of neuropsychological dysfunction due to boxing was found, either following a bout or a series of bouts at follow up. None of a range of parameters including number of previous contests, recovery from an earlier bout, number of head blows received during a bout and number of bouts between initial assessment and follow up, were found to be related to changes in cognitive functioning. %U https://jnnp.bmj.com/content/jnnp/56/10/1055.full.pdf