PERSISTENT VISUOSPATIAL ATTENTION DEFICITS FOLLOWING MILD HEAD-INJURYIN AUSTRALIAN RULES FOOTBALL PLAYERS

The ability to direct visuospatial attention covertly was studied in t wo groups of Australian Rules football players who had sustained mild head injuries (MHI) during competition. Their performance was compared to 12 non-injured sportsmen using a cued reaction time (RT) task whic h measured the RT benefit of valid directional cueing and the RT cost of miscueing. In Experiment 1, nine footballers tested within 2 weeks of sustaining their injury showed the same cost as normals in speed of response to targets in the unexpected visual field. However, their re sponses to targets in the expected location (following valid cues) sho wed only a minor benefit compared to controls. Moderate to severely in jured patients also show a normal cost but a reduced or absent benefit (CREMONA-METEYARD and GEFFEN, Neuropsychologia 30, 123-132, 1992). Wh en subjects were retested 1 year later their pattern of performance ha d not altered but overall RT had improved. Experiment 2 replicated the se findings in another eight footballers tested at least 1 year after sustaining their MHI. A persistent consequence of MHI might be an inab ility to take action quickly in response to expected events.