PSY BEH 11A Lecture Notes - Lecture 5: Frontal Lobe, Indolamines, Tourette Syndrome
15 Oct 2018
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Shapes of certain channels change, allowing ions to rush in. All the sodium ions are in & all the potassium ions are out. Takes nak pump 1-2 ms to reset. Action potentials are the electrical signals that travel down axons. Changes in potassium channel -> potassium rushes out. Refractory period -> when sodium potassium pump resetting. General anesthesia block the potassium ions from going out. *depending on how long the axon is, can be firing in multiple places despite the refractory period. Impossible for the neuron to fire again in that exact spot on the axon. *there is an upper bound on how fast neurons can spike -> neurons have low band-with considering the amount of information that they need to process. Like doing the wave at a football game. Channels nearby will also open -> action potential able to move down the axon. Makes a person go unconscious by playing with that process.
