Neurosurgery notes/Anatomy/Embryology/6 stages of CNS maturation/Ventricular system

Ventricular system

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6 stages of CNS maturation

Development of Ventricular System

Cavity of each telencephalic vesicle
→
Lateral ventricle
Cavity of diencephalon (along with the central part of the telencephalon)
→
Third ventricle
Cavity of the mesencephalon remains narrow
→
Cerebral aqueduct (aqueduct of Sylvius)
Cavity of the rhombencephalon. Its continuation in the spinal cord is the central canal.
→
Fourth ventricle
cells lining the wall of the neural tube proliferate to form thickenings
cells lining the wall of the neural tube proliferate to form thickenings
Basal laminae: ventral thickening, forms motor neurons; Alar laminae: dorsal thickening, forms sensory neurons and interneurons; Sulcus limitans: line separating both laminae
Basal laminae: ventral thickening, forms motor neurons; Alar laminae: dorsal thickening, forms sensory neurons and interneurons; Sulcus limitans: line separating both laminae