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Lecture 5 - B All or none law C speed • Diameter&...

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Lecture 5 Biological Basis for behavior Neuron brain behavior The neuron (nerve cell) Three types of neurons: o Sensory: relay info from sense organs to brain o Motor: relay info from brain to muscles Structure of the neuron o Cell body (a.k.a. soma) – powerhouse o Dendrites- receptor, receives messages o Axon- delivers messages Function of neuron – Transmit info via electrochemical energy o Axonal (within neuron) – Electric o Polarized Semi-permeable membrane o Resting potential o Action potential A) firing threshold
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Unformatted text preview: B) All or none law C) speed • Diameter & myelin o Synaptic (between neurons) – Chemical Synapse Neurotransmitters Excitatory vs. Inhibitory Effects Neurotransmitters • Acetylcholine (ACh) • Norepinepherine (NE) • Dopamine • Serotonin • Endorphins Agonistic vs. Antagonistic effects Studying our brain • Once upon a time: Phrenology • Today o Damage studies/lesioning o Electrical stimulation (ESB) o Brain imaging CT, PET, MRI, fMRI...
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