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Neurogenesis - Anatomy & Physiology (view source)
Revision as of 16:10, 26 August 2008
, 16:10, 26 August 2008no edit summary
#In the brain, futher layers are added to increase complexity. This is possible because in the anterior of the embryo, neuroblasts (cells of the ventricular layer) retain their ability to undergo mitosis after leaving the ventricular layer.
#In the brain, futher layers are added to increase complexity. This is possible because in the anterior of the embryo, neuroblasts (cells of the ventricular layer) retain their ability to undergo mitosis after leaving the ventricular layer.
#*This difference is achieved by increased hydrostatic forces acting on the neuroblasts.
#*This difference is achieved by increased hydrostatic forces acting on the neuroblasts.
==Organisation of the Nervous System==
===Somatic Nervous System===
*Sensory neurones enter the CNS through a '''dorsal root'''.
**Sensory neurones have their cell bodies in dorsal root ganglia (DRG). DRG are evenly spaced along the spinal cord.
*Response to the stimulus is mediated by a single motor neurone.
**Somatic motor neurones have their cell bodies in the CNS. They leave the CNS by the '''ventral root'''.
*Dorsal and ventral roots converge to form '''spinal nerves'''.