Traumatic brain injury in humans can be divided into
Specific damage to brain tissue, as shows up on scans, analogous to brain injury after strokes.
Generalized brain damage as can be picked up by tissue products in the blood stream, yet to be shown to be of clinical relevance.
Specific neurological syndromes, as seen in boxers, eg EDH, CTE, etc.
Many animal models have tried to mimic concussion, which I think is irrelevant as it is probably due to temporary dysfunction of the vestibular reflex system originating in the inner ear, and nothing to do with the brain.
Hello, for stroke damage, I think you could find some data/reference in this article about neuroplasticity.
For concussion, you should read the chapter 46 (Animal Models for Concussion) of the book "Brain Neurotrauma: Molecular, Neuropsychological, and Rehabilitation Aspects."