The Ventricular System

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Presentation transcript:

The Ventricular System faizan

Ventricles Lateral Ventricles Third Ventricle Fourth Ventricle

Ventricles Ventricles are connected (communicate) Intraventricular Foramina (of Monroe) Lateral Ventricles to Third Ventricle Wide, oval hole Cerebral Aqueduct (of Sylvius) Third Ventricle to Fourth Long, thin channel Foramen of Magendie Median aperture -- Fourth ventricle to subarachnoid space Foramina of Luschka Lateral apertures -- Fourth ventricle to subarachnoid space

Ventricles Foramen of Monroe Aqueduct of Sylvius Foramina of Luschka Foramen of Magendie

Ventricles

Ventricles

Choroid Plexus and CSF Choroid Plexus Produces CSF Spongy tissue located in the ventricles Rich capillary bed Pia Mater Choroid endothelial cells Produces CSF About .35 ml per minute Total volume 70-120 ml

Choroid Plexus

CSF Flow Lateral ventricles Foramina of Monroe 3rd ventricle Aqueduct of Sylvius 4th Ventricle Foramen of Magendie/foramina of Lushka Subarachnoid Space Arachnoid granulations (absorption) Superior sagittal sinus

CSF Flow

CSF Absorption CSF flows to the dorsal surface of the brain, where arachnoid granulations form a one-way valve and let the excess CSF enter the veinous drainage of the superior sagittal sinus

CSF Absorption

Arachnoid Granulations

Ventricular System plus Amygdala

Ventricular System plus Thalamus

Ventricular System plus Thalamus

Ventricles, Brainstem, and Thalamus

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