Table 1.

Current and proposed impact and injury terminology

Describing impacts to the head
Current	Proposed	Description
Concussive	Concussive	An impact that is associated with a diagnosed concussion
Subconcussive	Non-concussive	An impact that may be of greater or less force than a concussive impact but is not associated with a diagnosed concussion
Describing injuries to the brain
Current	Proposed	Description
Concussion	Concussion	TBI with signs and symptoms related to transient alterations in brain function due to a biomechanical force
Subconcussive	Subclinical TBI	TBI, characterised by changes in neurological function, biomarkers or imaging, that is not associated with concussion signs or symptoms
Subconcussive	No injury	No evidence of TBI based on changes in neurological function, biomarkers or imaging

TBI, traumatic brain injury.