Abstract
Impulsivity is a common and debilitating sequela following traumatic brain injury (TBI) and should be assessed during the rehabilitation process. It is now accepted that impulsivity is a multidimensional construct and such a distinction may help in understanding the mechanisms underlying impulsivity and facilitate assessment. The goal of this study is to examine the link between impulsive behaviors and their underlying mechanisms in a TBI sample. Twenty-five TBI patients and twenty-four matched controls were administered performance tasks measuring prepotent response inhibition, resistance to proactive interference, and decision-making. Group comparisons show weaker performance on measures of inhibition and decision-making by the TBI participants. Finally, performance on the Modified Six Elements Task was associated with impulsive behaviors in everyday life as observed by treating clinicians. This study sheds light on the associations between executive functions and impulsivity in an acute rehabilitation setting.
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