Changes

Periodically along the surface of the wrapped glial cell there are gaps approximately every 1-2mm. Each gap allows the environment external to the myelin sheath to be exposed to the axon for approximately 1-2υm. These gaps in the sheath are called the '''Nodes of Ranvier''' and are important in the conduction of impulses along the axon.

Periodically along the surface of the wrapped glial cell there are gaps approximately every 1-2mm. Each gap allows the environment external to the myelin sheath to be exposed to the axon for approximately 1-2υm. These gaps in the sheath are called the '''Nodes of Ranvier''' and are important in the conduction of impulses along the axon.

====Schwann Cell====

====Schwann Cell====

Details regarding the Schwann cell have been covered within the PNS Structure and Anatomy page so for further information regarding Schwann cells please click [[PNS_Structure_-_Anatomy_%26_Physiology#The_Schwann_Cell|here]].

Details regarding the Schwann cell have been covered within the PNS Structure and Anatomy page so for further information regarding Schwann cells please click [[PNS_Structure_-_Anatomy_%26_Physiology#Schwann Cell|here]].

====Oligodendrocytes====

====Oligodendrocytes====

[[Image:oligodendrocyte.jpg|thumb|right|100px|Oligodendrocyte]]

[[Image:oligodendrocyte.jpg|thumb|right|100px|Oligodendrocyte]]