Several phytocannabinoids, terpenes and flavonoids demonstrated neuroprotective properties.
The technology has the potential to make cannabis law-enforcement fairer.
The trial has been carried out by Radicle Science and Open Book Extracts.
Researchers in the UK are hoping to fund a major health economic study.
Cannabis consumers had "significantly better" outcomes than non-users.
The endocannabinoid system is thought to be involved in mediating brain repair.
Dr Di Forti explains the motivations behind a new study hoping to explore the effects of cannabis on the brain.
Those who use cannabis are no more likely to lack motivation than people who don't, say authors.
Catch up on the latest global cannabis research.
Preliminary results suggest increased use may not be a bad thing.