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CNS Development - Anatomy & Physiology (view source)
Revision as of 16:13, 4 August 2011
, 16:13, 4 August 2011→Development of the Brain
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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 choroid plexus (for the production of CSF) and defined lateral ventricles.
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In the later stages of development, the brain develops a central sulcus with defined cerebral hemispheres. The telencephalon has gyri and sulci. There is also a defined diencephalon, mid-brain, pons, cerebellum and medulla oblongata. The lumen of the neural tube remains patent within the spinal cord as a narrow central canal.
===Formation of the Eyes===
The eyes are formed initially from expansion vesicles (called Optic Vesicles) from the lateral ventricles, as explained above. The outer portion of these vesicles then invaginates resulting in the formation of an optic cup and optic stalk.
===Caudal Spinal Cord Development===
===Caudal Spinal Cord Development===