Attention Deficit Hyperactivity Disorder (ADHD), a prevalent neurodevelopmental condition, urgently requires objective biomarkers to improve diagnostic precision and treatment monitoring. This systematic review evaluates the utility of task-state functional near-infrared spectroscopy (fNIRS) in identifying neurobiological biomarkers for ADHD in children and adolescents. Following PRISMA 2020 guidelines and a pre-registered protocol (PROSPERO: CRD42024612203), we systematically searched PubMed,…
