Which cognitive domains are commonly impaired as long-term sequelae after moderate-to-severe TBI?

• A. Language only
• B. Visual field deficits only
• C. Attention, memory, executive function, and processing speed
• D. Motor coordination only

Answer: (C)

After a moderate-to-severe TBI, thinking-related problems that persist long term most often involve how we attend, remember, plan and solve problems, and how quickly we can think. These four domains—attention, memory, executive function, and processing speed—tally with disruption to the brain networks that support sustained focus, encoding and retrieval of information, flexible thinking and goal-directed behavior, and the speed at which cognitive processes operate. When processing speed slows, it can make attention and memory tasks feel more effortful and can hinder executive functioning because slower processing gives less time for planning and monitoring actions. This combination is a common pattern seen after severe brain injury, reflecting widespread diffuse injury and damage to frontal-subcortical circuits that underlie these cognitive systems.

Language issues, visual field deficits, or motor coordination problems can occur after TBI, but they are not the core long-term cognitive sequelae that typically cluster together as the most common persistent cognitive deficits. Language problems may appear with specific left-hemisphere injury or diffuse damage but are not universally the lasting cognitive profile. Visual field losses are sensory/visual pathway problems, not primarily cognitive processing. Motor coordination challenges are about movement and coordination, not the thinking abilities these domains describe.