what is it? nervous system composition: 2 cell types neurons glia parts of neuron - function - structure neural communication electrical within, chemical between vesicles, exocytosis, & binding epinephrine (E) & norepinephrine (NE) neurotransmitters glutamate (+) vs GABA (-) acetylcholine (Ach) dopamine (DA) serotonin (5-HT) about receptor subtypes inactivating NTs reuptake enzymatic breakdown diffusion effects after binding IONOTROPIC METABOTROPIC - cascade of events requiring energy - turn on/off genes - alters structure of the cell - fast nervous system central nervous system peripheral nervous system brain spinal cord somatic NS autonomicNS sensory nerves motor nerves sympathetic NS parasympathetic NS cortex brain stem subcortical structures brain anatomy forebrain, midbrain, hindbrain during neurodevelopment when fully developed subdivisions of brain ventricles central canalventricles cerebrospinal fluid choroid plexus hindbrain medulla RAS & raphe vital functions reflexes hindbrain pons RAS & raphe REM & paralysis decussation locus coeruleus hindbrain cerebellum coordination Integrates intention for movement w/ balance, motor, senses learning hindbrain & midbrain midbrain tegmentum forebrains diencephalon forebrains telencephalon limbic system Amygdala Hippocampus Cingulate gyrus Hypothalamus? forebrains telencephalon basal ganglia cortical lobes executive functions planning & organizing working memory (internally-guided) sequencing set-shifting vs perseveration abstract thinking inhibition maturation of PFC cells