Language impairments in traumatic brain injury: a window into complex cognitive performance.

Often, standard aphasia batteries do not fully characterize higher-order cognitive-linguistic sequelae associated with a traumatic brain injury (TBI). Limited understanding and detection of complex linguistic deficits have thwarted efforts to comprehensively remediate higher-order language deficits that persist even in chronic stages of recovery post-TBI. This chapter reviews key precursor metrics that have motivated efforts to elucidate higher-order language proficiencies after a TBI. The chapter further expounds on a paradigmatic shift away from sole focus on lower level basic skills, towards a more top-down cognitive control approach to measure, retrain, and strengthen complex language abilities in TBI. The intricate relations between complex language abilities and cognitive control functions are also discussed. The concluding section offers promising directions for future research and clinical management based on new discoveries of higher-order language impairments and their modifiability in TBI populations.