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Encyclopedia > Postsynaptic

A synapse is a connection between two neurons: presynaptic and postsynaptic. The first is usually the sender of a "signal" (which may be taken to be the chemicals it releases or the action potential that triggers this release), while the second is the receiver. Synapses allow nerve cells to communicate with one another through axons and dendrites, converting electrical signals into chemical ones. ... Neurons (also spelled neurones or called nerve cells) are the primary cells of the nervous system. ... Neurotransmitters are chemicals that are used to relay, amplify and modulate electrical signals between a presynaptic and a postsynaptic neuron. ... Schematic of an electrophysiological recording of an action potential showing the various phases which occur as the wave passes a point on a cell membrane. ...


Thus the word presynaptic means something related with the first neural cell, or just that part of a synapse that is in fact a part of this first neuron, whilst postsynaptic means something related to the second cell.


See also: neurotransmitter Neurotransmitters are chemicals that are used to relay, amplify and modulate electrical signals between a presynaptic and a postsynaptic neuron. ...


  Results from FactBites:
 
Postsynaptic - Wikipedia, the free encyclopedia (108 words)
A synapse is a connection between two neurons: presynaptic and postsynaptic.
The first is usually the sender of a "signal" (which may be taken to be the chemicals it releases or the action potential that triggers this release), while the second is the receiver.
Thus the word presynaptic means something related with the first neural cell, or just that part of a synapse that is in fact a part of this first neuron, whilst postsynaptic means something related to the second cell.
Excitatory postsynaptic potential - Wikipedia, the free encyclopedia (368 words)
In neuroscience, an excitatory postsynaptic potential (EPSP) is a temporary decrease in postsynaptic membrane potential caused by the flow of positively-charged ions into the postsynaptic cell.
They are the opposite of inhibitory postsynaptic potentials (IPSPs), which usually result from the flow of negative ions into the cell.
Larger EPSPs result in greater membrane depolarization and thus increase the likelihood that the postsynaptic cell reaches the threshold for firing an action potential.
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