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.
In the case of drug users, one pill or one puff on a certain substance may not be enough. The body adapts to the substance that has been introduced. When the drug is no longer available withdrawal symptoms that are the opposite of the direct effects of the drug appear and this is when the withdrawal occurs.he euphoria that drugs produce is usually what causes addiction. This is produced by the nucleus accumbens which is considered the pleasure center of the brain. Dopamine is used by this center to cause the euphoria drug users enjoy.