PS268 Lecture Notes - Lecture 3: Psychoactive Drug, Peripheral Nervous System, Neurotransmission
Document Summary
Lesson 3 basic principles of drug effects on the brain and body. If they didn"t, withdrawal symptoms would never stop. 3. 2 components of the nervous system & neurotransmission: 2 parts of the nervous system, neurons. 3. 3 the peripheral nervous system: divisions of nervous system, peripheral nervous system: Includes: somatic nervous system (basic motor fxn ie. walking, no effect from psychoactive drugs, autonomic nervous system (regulates organs ie. heart rate, central nervous system. Includes: brain, spinal cord, why study effects of psychoactive drugs on the ans, most psychoactive drugs leave tell-tale signs that they are being used. Ie. heroin, opiates, alcohol: high dose = shallow breathing & pupil constriction: easier for drug diagnosis, making sure people are abstaining. 3. 5 drugs and the brain: there are a variety of different neurotransmitter receptors in the brain, each within different brain structures, and each with different properties. Information exchange between neurons: neurotransmitter is released from one receptor, neurotransmitter moves to a new neuron, repeat.
