A traumatic brain injury (TBI) can result in so many different types of symptoms. You might also notice that your child develops different symptoms after he is released from the hospital, or even months or years following the injury. People who suffer from a brain injury commonly experience issues with cognitive skills. Cognition includes memory, awareness, reasoning, problem solving, and concentration. Cognitive problems can also include issues with executive functioning, which refers to self-monitoring, goal-setting, planning, and initiating.