The prefrontal lobe is responsible for being able to function at this level of daily performance

The prefrontal lobe does not complete its development until adolescence is completed

Executive skill functioning means being able to self-regulate one’s behavior, set goals, initiate goal-directed behavior by making a plan to reach a goal, follow through with the plan, evaluate the success or failure of the plan to determine what and how to identify the next step.

Being able to perform at this highest level of functioning requires one's ability to problem solve, organize, plan and sequence behavior, and control impulsivity and inappropriate behaviors that would interfere with success.

A person with a head injury may be challenged at one or more stages of executive skill functioning.

Often, head injured persons are unaware of their deficits. Often, they are people with poor insight. Therefore, they would be unable to self-evaluate their performance.