Neuro review week 6 material

• A. Cerebral aquaduct
• B.Fourth Ventricle
• C. Interventricular Foramen
• D.Lateral Ventricle
• E. Third ventricle

• A. Cerebral aquaduct
• B.Fourth Ventricle
• C. Interventricular Foramen
• D.Lateral Ventricle
• E. Third ventricle

Pair of "C"- shaped structures with "horns."

• Region                Lobe
• Ant. horn              Frontal
• Body                    Parietal
• Inf. horn               Temporal
• Post. horn            Occipital

Lateral Ventricles and third ventricle

3rd and 4th ventricles

• Floor - hypothalamus
• Walls - right/left thalamus

• Laterally into the cerebral hemispheres
• central canal (after narrowing inferiorly)

• neuroglial cells
• line ventricles

• specialized capillaries covered with ependymal cells
• produces CSF
• in central parts of all ventricles

• Clear lymph-like fluid that is produced by the choroid plexus
• located in the lateral, third & fourth ventricles
• protective cushion for the brain and spinal cord

Mushroom-like (finger-like) projections that protrude into the dural sinuses of the brain, and allow CSF to exit the brain, and enter the blood stream (venous system)

Lateral ventricles

• Layers of protective covering that surrounds CNS
• With CSF, cradles and suspends brain and spinal cord within bony protection (cushion/protect brain & spinal cord)

• Periosteal layer & meningeal layer
• Dural sinuses

Dura mater separating the right & left cerebral hemispheres

Dura mater separating occipital lobes of the cerebrum from the cerebellum

Dura mater seperating the two cerebellar hemispheres

• Fibrous filaments
• Extend from the arachnoid to the pia
• Help to “anchor” the brain to prevent it from excessive movement in cases of sudden acceleration or deceleration

• very thin innner layer that clings to the brains surface, dipping into grooves or contours
• Nourishment (it contains many nerves and blood vessels)

• The cone shaped end of the spinal cord.
• The filum terminale.

• spinal pia mater gathered at the end of the conus medullaris into a thin, non-nervous filament.
• ~20cm
• the periosteum of the 1st coccygeal vertebra
• to anchor and stabilize the spinal cord

The large subarachnoid space at the level of the conus medullaris.

• Tooth-like extension from the pia mater of the spinal cord.
• Located on each side of the entire spinal cord.
• Attached to the arachnoid and dura mater.
• To anchor and stabilize the spinal cord.

• Inflammation of the meninges.
• Bacteria or virus invading the CSF.
• Dura may be affected, but pia and arachnoid are more common.
• Blindness, loss of hearing, mental retardation, paralysis & death.
• Bacterial.

• Space between the dura mater and the periosteum of the bone.
• Loose CT and fat.

• Space between the meningeal layer of dura mater and arachnoid.
• Thin film of fluid.