Excitatory

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Excitatory

Excitatory (/ɪkˈsaɪtətɔːri/) refers to the process or function that increases neuronal activity or the likelihood of a neuron firing an action potential. The term is often used in the context of neuroscience and physiology to describe the action of certain neurotransmitters, synapses, and neurons.

Etymology

The term "excitatory" is derived from the Latin word "excitare", which means "to rouse" or "to stir up". It is used in the context of neuroscience to describe the process of increasing neuronal activity.

Related Terms

  • Excitatory postsynaptic potential (EPSP): A postsynaptic potential that makes the postsynaptic neuron more likely to fire an action potential.
  • Excitatory neurotransmitter: A type of neurotransmitter that increases the likelihood of a neuron firing an action potential.
  • Excitatory synapse: A synapse where an action potential in the presynaptic neuron increases the probability of an action potential occurring in the postsynaptic cell.
  • Inhibitory: The opposite of excitatory, referring to the process or function that decreases neuronal activity or the likelihood of a neuron firing an action potential.

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