PSY 1101 Chapter Notes - Chapter 2: Neuroimaging, Cerebral Cortex, Reading Disability
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PSY 1101 Full Course Notes
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Information systems of humans and other animals operate very similarly. If excitatory signals minus the inhibitory signals exceed a minimal intensity (threshold), the combined signals trigger an action potential: action potential travels down the axon, which branches into other neurons, muscles and glands. How neurons communicate: british psychologist sir charles sherrington (1857-1952) noticed neural impulses were taking a long time to travel a neural pathway. Inferred there must be a brief interruption in the transmission: called the meeting point between neurons a synapse. Synapse the junction between the axon tip of the sending neuron and the dendrite or cell body of the receiving neuron. Botulin causes paralysis by blocking ach release (botox) Somatic the division of the pns that controls the body"s skeletal muscles (voluntary) Central nervous system: grain-of-sand sized speck of your brain contains some 100,000 neurons and one billion. Information travels to and from the brain through the spinal cord.