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Neurons - Anatomy & Physiology (view source)
Revision as of 09:00, 25 August 2011
, 09:00, 25 August 2011→Unmyelinated Axons
====Unmyelinated Axons====
====Unmyelinated Axons====
Conduction of an action potential along an unmyelinated axon, i.e. an axon not covered by some form of glial cell, is a much slower form of nerve impulse propagation than that of a myelinated axon.
Conduction of an action potential along an unmyelinated axon, i.e. an axon not covered by some form of glial cell, is a much slower form of nerve impulse propagation than that of a myelinated axon.
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At a given moment voltage-gated sodium channels within the membrane of the axon will open resulting in an influx of ions following their electro-chemical gradient. This Na<sup>+</sup> influx causes the axon to accumulate a positive charge and results in cellular depolarisation. The extracellular
====Myelinated Axons====
====Myelinated Axons====