The National Academies Forum on Traumatic Brain Injury (TBI) convened a workshop in September 2022 to explore biomarkers used to more precisely and objectively diagnose and categorize suspected TBIs. Session discussions addressed developments in TBI biomarker classes including neuroimaging, blood-based, electrophysiological, and other physiological markers; how biomarkers may be used to better guide and monitor treatment after injury; and how they...