Ventricular System - Components

Components

The system comprises four ventricles:

  • right and left lateral ventricles (the first and second ventricles)
  • third ventricle
  • fourth ventricle

There are several small holes or foramina that connect these ventricles, though only the first two of the list below are generally considered part of the ventricular system:

Name From To
right and left interventricular foramina (Monro) lateral ventricles third ventricle
cerebral aqueduct (Sylvius) third ventricle fourth ventricle
Median aperture (Magendie) fourth ventricle subarachnoid space/cisterna magna
right and left Lateral aperture (Luschka) fourth ventricle subarachnoid space/cistern of great cerebral vein

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