Role of sensory modality and motor planning in the slowing of patients with traumatic brain injury: A meta-analysis

Results confirm previous observations that TBI patients are delayed with respect to matched controls by a multiplicative factor affecting performance over and above the specific characteristics of the tasks. This meta-analysis also shows that the global factor affecting TBI patients' performance is selective for the visual modality. No over-additivity was detected on tasks in the acoustic modality. Estimates of the time taken by the sensory-motor component of the task indicated substantial slowing in the TBI patients. This delay was particularly marked in patients with severe TBI.