Definition for Difference between revisions of "Excitatory postsynaptic potential (EPSP)"
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(Created page with "The response from an excitatory neurotransmitter depolarizing the postsynaptic membrane; the depolarization brings the membrane potential closer to the threshold potential that w...") |
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| − | The response from an excitatory neurotransmitter depolarizing the postsynaptic membrane; the depolarization brings the membrane potential closer to the threshold potential that would trigger an action potential. | + | 1) The response from an excitatory neurotransmitter depolarizing the postsynaptic membrane; the depolarization brings the membrane potential closer to the threshold potential that would trigger an action potential. |
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| + | 2) An excitatory postsynaptic potential is a temporary depolarization of postsynaptic membrane potential caused by the flow of positively charged ions into the postsynaptic cell as a result of opening ligand-sensitive channels - a postsynaptic cell is defined as excitatory if it makes it easier for the neuron to fire an action potential, EPSPs can also result from a decrease in outgoing positive charges - the EPSP excites the next neuron and is dependent upon excitatory transmitters. | ||
Latest revision as of 00:32, 3 September 2011
1) The response from an excitatory neurotransmitter depolarizing the postsynaptic membrane; the depolarization brings the membrane potential closer to the threshold potential that would trigger an action potential.
2) An excitatory postsynaptic potential is a temporary depolarization of postsynaptic membrane potential caused by the flow of positively charged ions into the postsynaptic cell as a result of opening ligand-sensitive channels - a postsynaptic cell is defined as excitatory if it makes it easier for the neuron to fire an action potential, EPSPs can also result from a decrease in outgoing positive charges - the EPSP excites the next neuron and is dependent upon excitatory transmitters.