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CNS Development - Anatomy & Physiology (view source)
Revision as of 15:54, 4 August 2011
, 15:54, 4 August 2011→Neural Differentiation
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===Development of the Brain===
===Development of the Brain===
Development of the brain begins with a series of expansions of the neural tube at the cranial end, giving rise to the internal spaces of the brain, the ventricles and aqueducts. The initial expansion of the neural tube is in the mesencephalon area, or mid brain area. This is then followed by expansions in the rhombencephalon (hind brain) and in the proencephalon (forebrain).
[[Image:WIKIVETbraindifferentiation.jpg|thumb|centre|300px|Brain Differentiation - © Sophie Stenner]]
===Caudal Spinal Cord Development===
===Caudal Spinal Cord Development===
In late development, the spinal cord extends along the entire length of the spinal canal (formed by the spinal vertebrae). The spinal cord then terminates at the 'conus medullaris' in the middle of the lumbar spine. In adults the spinal cord ends at the beginning of the lumbar psine. Lumbar and sacral nerves extend via the 'cauda equine'.
In late development, the spinal cord extends along the entire length of the spinal canal (formed by the spinal vertebrae). The spinal cord then terminates at the 'conus medullaris' in the middle of the lumbar spine. In adults the spinal cord ends at the beginning of the lumbar psine. Lumbar and sacral nerves extend via the 'cauda equine'.
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Therefore in neonates CSF taps must be caudal to the conus medullaris to avoid damaging the spinal cord.
Therefore in neonates CSF taps must be caudal to the conus medullaris to avoid damaging the spinal cord.
====Origins of Functional Types of Neurone====
====Origins of Functional Types of Neurone====