While this seems to be the likely scenario, this isn't actually known for sure yet. We know that every concussion causes cumulative damage, but it is unclear wh

While this seems to be the likely scenario, this isn't actually known for sure yet. We know that every concussion causes cumulative damage, but it is unclear what level of sub-concussive hit causes cumulative damage? It's almost certainly not 'none', but we don't know whether it's a light tap, or an almost concussive hit. For example, it could be that concussion is a red herring and certain angles and acceleration profiles are the issue and these don't correlate at all with concussion.