Lecture 2: CNS

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  1. What makes up the CNS?
    Brain and Spinal cord
  2. Name the four areas of the Brain
    • Cerebral Hemispheres with cerebral cortex (3.2-3.5lbs)
    • Diencephalon
    • Cerebellum
    • Brain Stem
  3. What make up the Diencephalon?
    • Thalmus
    • Hypothalmus
    • Epithalmus
  4. What makes up the Brain Stem?
    • Midbrain
    • Pons
    • Medulla Oblongata
  5. How is the brain protected?
    • Cranium
    • Mengies
    • Blood Brain Barrier
    • Cerebrospinal Fluid
  6. Describe the Cranium
    Formed by the skull bones
  7. Describe the Meninges
    • 3 tough membranes
    • Dura Mater
    • Arachnoid Mater
    • Pia Mater
  8. Desribe the Dura Mater
    • It is the outer most layer of the meninges
    • It is the strongest layer
    • drains venous blood
  9. Describe the Arachnoid mater
    • The middle layer of the meninges
    • Houses the subarachnoid space which contains CSF
  10. Describe the Pia Mater
    • It is the inner most meninge layer
    • lines brain
    • contains blood vessels
  11. Describe the Blood Brain Barrier
    • allows O2 and glucose to pass freely
    • formed by a tight junction of astrocytes
    • Regulates premiability
  12. Describe Cerebrospinal Fluid (CSF)
    • Protects the brain from chemical and physical injury
    • Nourishes the brain
    • Reduces the weight by 97%
    • Formed in the choroid plexuses
  13. Describe the Circulation of CSF
    • It is formed in the ventricles
    • Lateral horns ----> Third Ventricle---->Fourth Ventricle---->Central Canal------>subarachnoid space---->back to blood
  14. Describe the ventricles
    • Connected to one another and to the central canal of the spinal cord
    • Lined by ependymal cells
    • Contain CSF
    • there ar 4 ventricles (2lateral , 3rd, 4th ventricle)
  15. What do you call the ridges in the Cerebrum (Cerebral Hempispheres)
    • Gyrus -Singular
    • Gyri-Plural
  16. What do you call the grooves in the Cerebrum?
    • Slucus -Singluar
    • Sulci - Plural
  17. What do you call the deep grooves in the Cerebrum
  18. How many lobes are there in the cerebrum?
  19. Name the five lobes of the Cerebrum
    • Frontal
    • Parietal
    • Temporal
    • Occipital
    • Insula

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Lecture 2: CNS
2011-10-27 02:08:55
SCB204 Quiz

Lecture 2: CNS
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