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#*The germinal layer is now known as the '''ventricular layer'''.

#*The germinal layer is now known as the '''ventricular layer'''.

#Cells of the intermediate layer differentiate into one of two cells:

#Cells of the intermediate layer differentiate into one of two cells:

#*[[Nervous System - PNS - Anatomy & Physiology#Nerve Fibre|Neurones]] - for conductance of nerve impluses.

#*[[PNS Structure - Anatomy & Physiology#Nerve Fibre|Neurones]] - for conductance of nerve impluses.

#*Glia - for insulation of electrical signals. Form oligodendrocytes in the CNS, and [[Nervous System - PNS - Anatomy & Physiology#The Schwann Cell|schwann cells]] in the PNS.

#*Glia - for insulation of electrical signals. Form oligodendrocytes in the CNS, and [[PNS Structure - Anatomy & Physiology#The Schwann Cell|schwann cells]] in the PNS.

#Glial cells surrounds the axons furthest away form the lumen of the neural tube. Because this part is myelinated, it appears ''white''. It is called the '''marginal layer'''.

#Glial cells surrounds the axons furthest away form the lumen of the neural tube. Because this part is myelinated, it appears ''white''. It is called the '''marginal layer'''.

#Axons closer to the lumen of the neural tube, which the glial cells do not surround appear ''grey''. This layer is called the '''intermediate layer'''.

#Axons closer to the lumen of the neural tube, which the glial cells do not surround appear ''grey''. This layer is called the '''intermediate layer'''.

*They differentiate once they reach their destination.

*They differentiate once they reach their destination.

*Other non - neural tissues also develop from the neural crest. The type of tissue that neural crest forms is dependant on the origination of the cell along the anterior - posterior axis:

*Other non - neural tissues also develop from the neural crest. The type of tissue that neural crest forms is dependant on the origination of the cell along the anterior - posterior axis:

::'''Anterior Neural Crest''' forms; sensory neurones and [[Nervous System - PNS - Anatomy & Physiology#Schwann Cells|schwann cells]]; [[Bones and Cartilage - Anatomy & Physiology|bones]] of the head; dermis of the face; and [[Bones and Cartilage - Anatomy & Physiology|cartilage]].

::'''Anterior Neural Crest''' forms; sensory neurones and [[PNS Structure - Anatomy & Physiology#Schwann Cells|schwann cells]]; [[Bones and Cartilage - Anatomy & Physiology|bones]] of the head; dermis of the face; and [[Bones and Cartilage - Anatomy & Physiology|cartilage]].

::'''Trunk Neural Crest''' forms; sensory neurones of the somatic and autonomic nervous systems (ANS); sympathetic motor neurones of the ANS; melanocytes.

::'''Trunk Neural Crest''' forms; sensory neurones of the somatic and autonomic nervous systems (ANS); sympathetic motor neurones of the ANS; melanocytes.

::'''Posterior Neural Crest''' forms parasympathetic motor neurones of the [[Alimentary - Anatomy & Physiology#Small Intestine|gut]], which control peristalsis.

::'''Posterior Neural Crest''' forms parasympathetic motor neurones of the [[Alimentary - Anatomy & Physiology#Small Intestine|gut]], which control peristalsis.