Neurocardiogenic syncope is caused by a drop in blood pressure, quickly followed by faster then slower heart rate resulting in poor blood and oxygen flow to the brain which results in temporary loss of consciousness. Neurocardiogenic syncope (NCS) is also referred to as vasovagal syncope or neurally mediated syncope.
Dopamine Levels Increase. All addictive drugs affect brain pathways involving rewardâthat is, the dopamine system in the reward pathway. Within seconds to minutes of entering the body, drugs cause dramatic changes to synapses in the brain.By activating the brain's reward circuitry, drugs deliver a jolt of intense pleasure.ll addictive drugs affect brain pathways involving rewardâthat is, the dopamine system in the reward pathway. Within seconds to minutes of entering the body, drugs cause dramatic changes to synapses in the brain.
Many people have reported getting addicted to meth in as little as one use. The feelings of euphoria, alertness and confidence that result from use have a powerful effect on the brain reward system. Meth releases more than three times the amount of dopamine that cocaine does, highlighting how addictive it is.