Are psychoactive drugs with lower lethal doses more neurotoxic (more damaging to the brain)? For example, tetrahydrocannabinol (cannabis) has a much higher lethal dose than benzoylmethylecgonine (cocaine), so could we deduce that cocaine is more damaging to the brain? Moreover, is a mathematical ...

Why are action potentials not initiated at dendrites although dendrites are the first to receive input from presynaptic cell ? Infact EPSPs at dendrites are the lowest compared to cell body and axon. Considering the fact that dendrites have enough voltage gated ion channels, why is it that cat...