substance misuse - the use of drugs or medicines that can be harmful to one’s healthб for example, taking an incorrect dose
substance abuse - the use of drugs or medicines in order to get high or harm oneself
substance addiction - the uncontrollable use of drugs
neurochemistry - is the study of chemicals, including neurotransmitters and other molecules such as psychopharmaceuticals and neuropeptides, that control and influence the physiology of the nervous system.
brain chemicals - things like dopamine, oxytocin, serotonin, and endorphins.
to hijack the brain - to cause our IQ to drop, to hinder the ability to make complex decisions
to trigger - to cause something to start
craving - a strong feeling of wanting something
to impair - to spoil something or make it weaker so that it is less effective
gray matter - the darker tissue containing nerve fibres (= structures like threads) found in the brain and spinal cord
white matter - the pale tissue containing nerve fibres (= structures like threads) found in the brain and spinal cord
neurotransmitter - a chemical that carries messages between neurons or between neurons and muscles
synapse - the point at which electrical signals move from one nerve cell to another
the brain's reward circuit - the area of the brain also called “pleasure pathways”
reduced impulse control - a lack of impulse control, failure to resist a temptation or an urge
euphoria = the high from drugs
endorphin - a chemical naturally, released in the brain to reduce pain, that in large amounts can make you feel relaxed or full of energy
drug tolerance - needing to take larger amount of the drug to produce the same high
a vicious circle - a continuing unpleasant situation, created when one problem causes another problem that then makes the first problem worse
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