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The Axon Initial Segment: An Updated Viewpoint

Abstract : At the base of axons sits a unique compartment called the axon initial segment (AIS). The AIS generates and shapes the action potential before it is propagated along the axon. Neuronal excitability thus depends crucially on the AIS composition and position, and these adapt to developmental and physiological conditions. The AIS also demarcates the boundary between the somatodendritic and axonal compartments. Recent studies have brought insights into the molecular architecture of the AIS and how it regulates protein trafficking. This Viewpoints article summarizes current knowledge about the AIS and highlights future challenges in understanding this key actor of neuronal physiology.
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Contributor : Christophe Leterrier <>
Submitted on : Friday, April 20, 2018 - 4:19:18 PM
Last modification on : Thursday, November 7, 2019 - 10:46:01 AM
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Christophe Leterrier. The Axon Initial Segment: An Updated Viewpoint. Journal of Neuroscience, Society for Neuroscience, 2018, 38 (9), pp.2135-2145. ⟨10.1523/JNEUROSCI.1922-17.2018⟩. ⟨hal-01736917⟩

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