Ventricles of the Brain
Anteriorly, the lateral ventricles lie close together separated only by a thin median membrane called the septum pellucidum
Each ventricle communicates with the narrow third ventricle in the diencephalon
Ventricles of the Brain
Communication occurs through the inter ventricular foramen (foramen of Moro)
Ventricles of the Brain
The third ventricle is continuous with the fourth ventricle via the canallike cerebral aqueduct
that runs through 
the midbrain
Ventricles of the Brain
The fourth |
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ventricle which |
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lies dorsal to the |
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pons and |
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posterior to the |
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medulla, is |
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continuous with |
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the central canal |
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of the spinal |
Pons |
cord inferiorly |
Ventricles of the Brain
Three openings mark the walls of the fourth ventricle
–Paired lateral apertures
–Median aperture
Apertures connect the ventricles to the subarachnoid space
Pons
Subarachnoid space is filled with cerebrospinal fluid to surround the brain
The Cerebral Hemispheres
The cerebral hemispheres form the superior part of the brain
These two structures account for about 83% of the mass of the brain
The two hemispheres cover and obscure the diencephalon and the top of the brain stem
The Cerebral Hemispheres
Nearly the entire surface of the cerebral hemispheres is marked by elevated ridges of tissues called gyri separated by shallow grooves called sulci
Deeper grooves called fissures separate larger regions of the brain
The Cerebral Hemispheres
Prominent gyri and sulci are similar in all people
The median longitudinal fissure separates the hemispheres
The transverse fissure separates the cerebral hemispheres from the cerebellum below
Lobes of Cerebral Hemispheres
Deeper sulci |
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divide each |
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hemisphere into |
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five lobes |
Insula |
– Frontal lobe
– Temporal lobe
– Parietal lobe
–Occipital lobe
–Insula (located within the lateral sulcus)
Lobes of Cerebral Hemispheres
Location of the insula deep within the Lateral sulcus of the hemisphere
Insula 
