PSY 150A1 Lecture Notes - Lecture 3: Homeostasis, Reward System, Frontal Lobe
27 Sep 2016
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Lecture outline #3: biological bases of behavior biological psychology (aka. biopsychology, neuroscience): The neuron neuron: nerve cell average human brain = 100billion neurons: receives signals from other neurons or senses, process signals, send signals to other neurons, muscles, organs. Multiple sclerosis: deterioration of myelin slowed communication with muscles, impaired sensation in limbs. Schwann cells: segments of myelin sheath nodes of ranvier: gaps between schwann cells terminal buttons: structures at ends of axon branches contains neurotransmitters. Neuron functioning all-or-none law: neuron is always either at rest or firing resting potential: negative charge within neurons at rest action potential: excitatory messages: inhibitory messages: threshold: neurotransmitter: acetylcholine (ach): dopamine: norepinephrine: serotonin: Neurotransmitter natural painkiller response to pain, exercise, excitement, sex, love, etc. Mapping brain functions brain damage patients: e. g. stroke victims. Phineas gage: (1823-1860) neuroimaging: techniques that image the structure and/or function of the brain electroencephalograph (eeg): records brain"s electrical activity: measures function, looks for spikes/differences in electrical activity advantages:
