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Samsam Neuroanatomy
exam 2
13
Anatomy
Graduate
09/26/2011

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Cards

Term
Spinal Cord
Definition
42-45 cm in adults
Is part of the CNS
found in vertebral foramen
comes from neural tube
distal to medulla oblongata
extended from foramen magnum to lower level of L1
(L3 in newborn)
Term
Where are the two swellings of the Spinal cord located?
(also called the intumiscentia)
Definition
Cervical (C4-T1) intumescentia
and
Lumbar (T11-L1) intumescentia
(these areas are thicker because the contain neurons of the brachial and limbo sacral plexus)
Term
Spinal segments
Definition
C1 Segment is ABOVE C1 vertebrae.
8 - Cervical, 12 - Thoracic, 5 - Lumbar, 5 - Sacral, 1 - Coccygeal (31 pairs of nerves)
Term
Segment
Definition
Part of spinal cord where spinal roots originate from.
(SPINAL CORD ITSELF IS NOT SEGMENTED)
Term
Lumbar spinal nerves
Definition
Increase in size as you go down the vertebral column.
Foraminae decrease in size.
This meaning that L4/L5 are at risk for compression in disc hernia.
Term
Conus Medullaris
Definition
Point at which spinal cord terminates.
(Also )
Term
Filum Terminale
Definition
Is the distal continuation of the Pia mater around the spinal cord.
Term
Naming Spinal Nerve Roots
Definition
Normally name roots according to vertebrae above it.(EX: L4/L5 would be the L4 nerve root)
In the cervical region it goes according to the lower vertebrae.
Term
Compression of the nerve roots
Definition
Postero-lateral to the discs you find the vertebral column containing the nerve roots so a herniation can cause nerve compression.

Zygophysial joints may degenerate causing osteoarthritus/osteophytes and may cause never compression.
These joints are NN by primary dorsal rami which also NN the skin of the skin and muscles of the back.
Term
Arachnoid mater
Definition
The impermeable membrane between the dura and pia mater.
Term
Pia mater
Definition
Vascular membrane covering the spinal cord, brain gyri & sulci.
Term
Dura Mater
Definition
External layer covering the brain and spinal cord.
Term
Epidural space
Definition
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