PSYC 1000 Chapter Notes - Chapter 4-6: Cerebellum, Hypothalamus
18 Jun 2015
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If channels opened up, sodium would rush in and cause neuron to fire: there is more positive concentration outside the cell, contributes to negative charge in cell, action potential, sodium channels open, and ions rush in, they are positively charged, changing the balance of the cell, causing neuron to fire. Causes cell to be hyperpolarized, more negative than it was in its resting state a cell that has recently fired, will be less likely to fire right away, again needs to return to resting potential: all or none law, once a neuron"s electric charge reaches threshold, and action potential is triggered, it will always occur with the same strength, how the brain represents info that is continuous rate of firing and number of neurons firing varies, neurotransmitters, 100 150 different ones, each has a different effect, different impact on receiving cell (excitatory or inhibitory, or linked to a specific psychological disease, electrical to chemical to electrical slide 14,15,16,17**
