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CNS Organization and Terminology
Neuro - lecture #1
9
Physiology
Graduate
02/03/2010

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Term
What is contained in the CNS?
Definition
1. brain
2. spinal cord
3. 12 cranial nerves and dorsal and ventral roots
4. systems dedicated to somatic and autonomic function
Term
What are the six major regions of the CNS?
Definition
1. spinal cord
2. medulla oblongata
3. pons and cerebellum
4. midbrain (mesencephalon)
5. thalamus and hypothalamus (diencephalon)
6. cerebral cortex and basal ganglia (telencephalon)
Term
What is found in gray matter?
Definition
neurons, dendrites, unmyelinated axons, many glia
Term
what is found in white matter?
Definition
largely myelinated axons
Term
define:
1. nuclei
2. laminae
3. reticular formations
Definition
1. clusters of neurons in the CNS
2. layers of neurons in the CNS
3. loosely interspersed neurons in white matter in the CNS
Term
neuronal system
Definition
anatomically and functionally linked groups of neurons that involve most or all regions of the CNS
Term
cephalization
Definition
regionalization of the CNS, particularly the brain
- spinal cord does not have this
Term
the optic nerve and retina are outgrowths of what?
Definition
diencephalon
Term
the long axis of the nervous system is at a right angle to the _____
Definition
mesencephalon
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