Chapter 6

Drugs the brain agonist states of consciousness is

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Unformatted text preview: estoring neural function/ axon development Sensory stimulation therapy • • intensive multi-modal sensory stimulation involving heat, cold, touch, visual, auditory, olfactory. DRUGS & THE BRAIN DRUGS - enter the bloodstream and into the brain through a network of small blood vessels (called capillaries). BLOOD-BRAIN BARRIER * screen out many foreign sbstances Many drugs pass through and either facilitate or inhibit synaptic transimission. DRUGS & THE BRAIN AGONIST - • • • STATES OF CONSCIOUSNESS is a drug that increases the activity of a neurotransmitter Enhance neuron's ability to synthesize, store, or release the neurotransmitter. Bind with and stimulate post-synaptic receptor sites. Inhibit reuptake. ANTAGONIST – is a drug that decreases or inhibits the action of a neurotransmitter. • interferes with the neuron's ability to synthesize, store, or release the neurotransmitter. • Blocks (but does not activate the post-synaptic receptor sites. EXAMPLE OF AN AGONIST AMPHETAMINES • • Increases release of neuron-transmitter interferes with reuptake Amphetamines and neurotransmitters ANTAGONIST - is a drug that decreases or inhibits the action of a neurotransitter. • E.g.: E..g. Clozapine (used to treat schizophrenia) -blocks dopamine at the receptor sites. DEPRESSANTS - decrease NS functioning. ALCOHOL • • Increases activity of GABA (inhibitory neurotransmitter) decreases glutamate (excitatory neurotransimitter) LOWreducesMODERATE DOSES TO tension and anxiety • • • • Less inhibition Euphoria Impaired physical/ psychological functioning. (thinking/ judgement) (Glutamate) DEPRESSANTS ALCOHOL HIGH DOSES • disorientation • Depression • Unconsciousness • slow down vital life processes (even to point of death.) CHRONIC/LONG TERM USE • • • • • Tolerance develops gradually Physiological dependence Liver damage. relationships difficulties sexual dificulties ALCOHOL ABUSE ALCOHOL: a leading cause of health problems • 2/3 of adults drink • • Short term risks: accidents, assaults, overdosi...
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