​​​​​​​​cannabis data.org

https://www.ncbi.nlm.nih.gov/pubmed/15281893:  The name Cannabinoid applies to a large and diverse family of compounds including plant derived, synthetic and endogenously produced chemicals, some but not all of which are psychotropic. Cannabinoids of all classes have the ability to protect neurons from a variety of insults that are believed to underlie delayed neuronal death after traumatic brain injury (TBI), including excitotoxicity, calcium influx, free radical formation and neuroinflammation. The pathways and experimental models supporting a neuroprotective role for the various classes of cannabinoids are critically reviewed vis a vis their potential to support the development of a clinically viable neuroprotective agent for human TBI.

https://www.ncbi.nlm.nih.gov/pubmed/27184693:  The cannabinoid CB1 receptor was considered particularly interesting for therapeutic approaches in neurological diseases, because primarily expressed by neurons of the central nervous system. In many experimental models, these drugs act via this receptor, however, CB1 receptor independent mechanisms have been also described. Furthermore, endogenous ligands of cannabinoid receptors, the endocannabinoids, are potent modulators of the synaptic function in the brain. In neurological diseases, numerous studies reported modulation of the levels of endocannabinoids according to the phase of the disease and its progression.

Cannabis -vs- Traumatic Brain Injury