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What is the neural basis of behavior?

What is the neural basis of behavior?. Molecular vs . Molar levels of analysis The Neuron Structure Electrical and Chemical Action The Action Potential and the All-or-None Law Synaptic Transmission Neurotransmitters. Nodes of Ranvier. Axon. Myelin sheath. Axon terminals. Dendrites.

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What is the neural basis of behavior?

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  1. What is the neural basis of behavior? • Molecularvs. Molar levels of analysis • The Neuron • Structure • Electrical and Chemical Action • The Action Potential and the All-or-None Law • Synaptic Transmission • Neurotransmitters

  2. Nodes of Ranvier Axon Myelin sheath Axon terminals Dendrites (See Gleitman, p. 63) (cell nucleus) Neural impulse (cell body)

  3. At threshold: 500 msec At 160% of threshold: At 270% of threshold: (See Gleitman, p. 70) Axon Recording electrodes

  4. depolarization repolarization hyperpolarization resting potential (polarized) refractory period Stimulus onset (See Gleitman, p. 68) The action potentialVoltage change over Time

  5. These axon terminals have excitatoryeffects. These axon terminals have inhibitory effects. Dendrite Axon

  6. Dendrites Temporal summation: several impulses from one source over time Spatial summation: several impulses from several sources converging at the same time

  7. (See Gleitman, p. 69) K+ K+ K+ (outside) Na+ Na+ (inside) Na+ (outside) (inside) Na+ Na+ Na+

  8. Neural impulse Synaptic vesicle Axon terminal Presynaptic membrane Binding site Neurotransmitter molecule Postsynaptic membrane (See Gleitman, p. 72) Axon of the sending neuron Synapse (Synaptic gap or cleft) Receiving neuron

  9. A brief selection of well known neurotransmitter substances(from Gleitman, pp. 73-75): • Acetylcholine (+) • Serotonin (+) • Catecholamines: • Dopamine (+) • Norepinephrine (+) • Amino Acids • GABA (-) • Glutamate (+)

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