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Nervous system
Nervous system.
6
Science
Undergraduate 1
08/04/2013
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Term
Central Nervous System
 Definition
Brain & spinal cord.
Term
Peripheral nervous system
 Definition
All sensory & motor axons outside the CNS bundled as nerves.
Term
31 spinal nerves
 Definition
8 cervical (C1 - C8)
12 thoracic (T1-T12)
5 lumbar (L1-L5)
5 sacral (S1 - S5)
1 Coccygeal C0
Term
Spinal column ends at around L1
 Definition
Underneath is the Cauda Equina - horses mane.
Term
Spinal nerves exit at:
 Definition
Intervertebral foramen. Formed between adjacent vertebral arches.
Term
Spinal Stenosis
 Definition
Caused by reduction of the width of the intervertebral foramen. Bone degeneration, inflamation, disk rupture, oseophytes.

Leads to radiculopathy - radix, root & radicular pain.
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