Anatomy of the Spinal Cord Flashcards
1
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A
Vertebral Canal
- The spinal canal is the space in the vertebral column formed by the vertebrae through which the spinal cord passes
2
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A
Filum terminale
- A fibrous extension of the pia mater, extends even farther into the coccygeal canal to attach to the posterior coccyx
- Proceeds downward from the apex of the conus medullaris
3
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A
Spinal cord conus medullaris
- The cone shaped end of the spinal cord
- Ends at the level of L1 or L2
4
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A
Foramen Magnum
- Level of the origin of the spinal cord
5
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A
Denticulate ligaments
- Saw-toothed shelves of the pia mater
- Secures the spinal cord to the bony wall of the vertebral column all along its length
6
Q
Level of the termination of the spinal cord
A
- The spinal cord ends at the level L1 or L2
7
Q
Length of the spinal cord
A
- Approximately a meter long
- Ends at L1 or L2
8
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A
Meninges
- The three membranes (dura mater, arachoid layer, and pia mater) that lines the skull and the vertebral spinal cord
- Encloses the bone and spinal cord
9
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A
Subarachnoid Space
- Space between the arachnoid layer and the pia mater that has threadlike projections and contains the spinal fluid
10
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A
Subdural space
- Space that is between the dura mater and the arachnoid layer
11
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Epidural space
- Space between the dura mater and the bones of the vertebral canal
12
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A
Cerebrospinal Fluid (CSF)
- A liquid that fills the ventricles of the brain, the central canal of the spinal cord, and the space between the CNS (brain and spinal cord), and dura mater
- “Cushions”/protects the brain and spinal cord
13
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A
Dura Mater
- “Tough mother”
- The outermost, leathery double membraine layer of the meninges
14
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A
Arachnoid Layer
- Delicate, weblike middle layer of the meninges
15
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Pia Mater
- Delicate inner layer of the meninges which is highly vascular
16
Q
Number of spinal nerves
A
31 pairs
17
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A
Cervical Enlargment
- A thickening in the spinal cord that supplies nerves to the upper limbs
- Corresponds with the attachments of the large nerves which supply the the upper limbs
- Extends from C3 to T2
18
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A
Lumbar enlargment
- A widened area of the spinal cord that gives attachment to the nerves which supply the lower limbs
- From L2 to S3