Epidiolex, a cannabis-derived medicine for epilepsy, will prompt federal regulatory changes that could crack open access to study the plant.

The results suggest the virus could severely alter brain development in infants infected after birth, but blocking a signaling protein early on might ease certain symptoms.

Researchers identify patterns of neural activity ranging from a few days to four weeks in individuals with epilepsy.

Around 40 percent of children with an uncommon disorder had 50 percent fewer seizures while taking the marijuana derivative.

Viral infections of the central nervous system may trigger cytokines that induce seizures.