I've been reading about the many symptoms of a TBIs and mTBIs recently. Some that stood out was dizziness and inability to properly balance. My question is, do these symptoms always accompany a TBI or mTBI? In other words, does having a TBI or mTBI imply that one will have dizziness and inability to balance? If so, does this mean that a balance test such as standing on one leg and checking stability would be a valid test for the presence of a TBI or mTBI? Thank you for your time and effort.