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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).  

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 [[Midbrain_-_Anatomy_%26_Physiology|mesencephalon]] area, or mid brain area. This is then followed by expansions in the [[Hindbrain_-_Anatomy_%26_Physiology|rhombencephalon]] (hind brain) and in the [[Forebrain_-_Anatomy_%26_Physiology|proencephalon]] (forebrain).  

[[Image:WIKIVETbraindifferentiation.jpg|thumb|right|300px|Brain Differentiation - © Sophie Stenner]]

[[Image:WIKIVETbraindifferentiation.jpg|thumb|right|300px|Brain Differentiation - © Sophie Stenner]]

[[File:4 week embryo brain.jpg|thumb|150px|centre|Embryonic Brain Development]]

[[File:4 week embryo brain.jpg|thumb|150px|centre|Embryonic Brain Development]]

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The development of the brain continues with the forebrain out-pouchings developing into hemispheres and growing dorsolaterally, forming the telencephalon. These hemispheres grow over the newewly formed diencephalon, mesencephalon and back to the metencephalon. During this stage other developmental landmarks are developed including the Cepahlic flexure, Pontine flexure, Cervical flexure and the myelencephalon. An out-pouching for the cerebellum is also present at this stage of development, together with a choroid plexus (for the production of CSF) and defined lateral ventricles.

The development of the brain continues with the forebrain out-pouchings developing into hemispheres and growing dorsolaterally, forming the telencephalon. These hemispheres grow over the newewly formed diencephalon, mesencephalon and back to the metencephalon. During this stage other developmental landmarks are developed including the Cepahlic flexure, Pontine flexure, Cervical flexure and the myelencephalon. An out-pouching for the cerebellum is also present at this stage of development, together with a [[Cerebral_Spinal_Fluid_-_Anatomy_%26_Physiology|choroid plexus]] (for the production of CSF) and defined lateral ventricles.

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