VENTRICULAR SYSTEM

CSF secreted by cells of the

choroid plexus in the ventricles of the brain

1. CSF travels through the

2. the lateral apertures (foramen of Luschka) and median aperture (foramen of Magendie) drain into

subarachnoid space

1. what is absorbed by the venous system through the arachnoid villi/granulations

2. meninges enclose the

CSF

ventricular system

interconnected network that produces, transports, and removes CSF

ventricles of ventricular system include

2 lateral ventricles (1st and 2nd)

midline 3rd ventricle

midline 4th ventricle

lateral ventricles (1st and 2nd)

paired, c-shaped cavities

extend into all lobes of cerebral hemispheres

opens into 3rd ventricle via the intraventricular foramen (foramen of monro)

3rd ventricle

slit like cavity between R & L halves of the thalamus

continuous with 4th ventricle through the cerebral aqueduct

4th ventricle

small space dorsal to pons and medulla

tapers to a narrow channel that continues to SC (central canal)

CSF drains from the 4th ventricle into the subarachnoid space through 3 openings

2 lateral apertures (foramen of Luschka)

1 median aperture (foramen of Magendie)

cerebromedullary cistern

largest cistern collecting CSF

located between the cerebellum and medulla

from the subarachnoid space, CSF is absorbed into the dural venous sinuses via the

arachnoid villi / granulations

hydrocephalus

excess CSF in ventricles

results in dilation of ventricles and increased pressure on brain

hydrocephalus causes

overproduction of CSF

blockage of flow

issues with absorption