myelin

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4 Terms

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Myelin

Myelin is lipid rich sheath that wraps around axons,it is made of 70% lipid and 30% protein. It comes from oligodendrocytes in the CNS and Schwann cells in the PNS and can be found in the peripheral nerves and white matter tracts of the brain and spinal cord. It’s function is to increase conduction velocity

Multiple layers of myelin insulate the axon ​

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Electrical properties of myelin

Electrical properties of myelin

Increase conduction velocity

Increases the spread of voltage ​

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The g ratio

The g ratio

Optimum number of myelin wraps

G ratio = Axon diameter

Axon and myelin diameter​

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