Explain biological influences on behaviour

Psychology SL stimulus: In Wellington, school rugby players are involved in a sports-health project comparing attention checks with player confidence ratings. The focus is return-to-play confidence after mild concussion. Evidence says players often report high confidence before attention checks return to baseline. The method uses computer attention tasks, symptom logs, and coach notes with 84 participants over 4 weeks. The biological link is that concussion can affect neural recovery and attention speed. Use the biological explanation path before explaining the behaviour. Select the psychology concept, content link, context application, and evaluation limit. Then answer this in your own words: how would this route improve the Psychology SL response for this exact context? AI will analyse your reasoning, evidence use, concept-content-context link, method or ethics judgement, and expression.