World Science, a website, stated in its Nov. 25, 2006 article "Pot May Be Both Good and Bad, Researchers Say":

“This effect [getting ‘high’] can be helpful because excess release of glutamate — which is also an essential chemical messenger in the brain — is implicated in various disorders, including Alzheimer’s.

This … may explain why THC-like compounds, called cannabinoids, help protect brain cells in cases such as ischemia, or blocked blood vessels; excitotoxicity, or overstimulation of nerve cells; and even physical injuries.”

Nov. 25, 2006