Lecture 2: CNS

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Spuente
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112465
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Lecture 2: CNS
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2011-10-26 22:08:55
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SCB204 Quiz
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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
    Fissures
  18. How many lobes are there in the cerebrum?
    Five
  19. Name the five lobes of the Cerebrum
    • Frontal
    • Parietal
    • Temporal
    • Occipital
    • Insula

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