Term
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Definition
- CT coverings of the CNS
- Dura Mater (Tough Mother)
- Arachnoid
- Arachnoid Trebeculae = filaments in the subarachnoid space
- Pia Mater (Little/Fragile/Tender Mother)
- cannot be seperated from the spinal cord
- bacterial & viral meningitis
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Term
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Definition
- Epidural Space
- between bone and dura mater
- contains veins and fat
- Subdural Space
- between dura mater and arachnoid
- Subarachnoid Space
- between arachnoid and pia mater
- constains Cerebral Spinal Fluid
- location for spinal tap
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Term
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Definition
- 8 cervical -- extra spinal nerve than vertebra
- 12 thoracic
- 5 lumbar
- 5 sacral
- 1 coccygeal
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Term
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Definition
- each spinal cord segment gives rise to a pair of spinal nerves
- nerves exit vertebral column via the intervertebral foramina formed by the superior and inferior notches
- cervical nerves exit above the same numbered vertebra
- thoracic, lumbar and sacral nerves exit below the same numbered vertebra
- nerves run inferiorly within the spinal canal
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Term
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Definition
- Cord is shorther than the vertebral column
- The more inferior you go, the greater the distance between the spinal cord segment and its corresponding bone/vertebra
- Ends T11-L3, L1 on average (conus medullaris)
- Cauda Equina
- spinal taps are performed in the lower lumbar region to avoid striking the cord with the needle
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Term
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Definition
- CT band that holds the spinal cord in place
- runs from the conus medullaris to the anterior surface of the sacrum
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Term
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Definition
- Central Canal
- Grey Matter
- Neuron Cell Bodies
- Dendrites
- Horns -- Dorsal, Lateral (only in thoracic), Ventral
- White Matter
- bundles of axons
- white appearance due to myelin
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Term
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Definition
- Voluntary motor cell bodies
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Term
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Definition
- Autonomic motor cell bodies
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Term
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Definition
- Interneuron cell bodies, sensory axons, and axon terminals
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Term
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Definition
- Ganglion = collection of neuron cell bodies outside of the CNS
- Contain sensory cell bodies
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Term
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Definition
- Sensory Axons only (somatic and visceral)
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Term
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Definition
- Motor Axons only (voluntary and autonomic)
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Term
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Definition
- Motor and Sensory axons (fibers)
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Term
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Definition
- Axons to and from the lateral and anterior trunk
- Axons to and from the upper and lower extremities
- Sensory and motor axons
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Term
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Definition
- Axons to and from the posterior trunk
- Sensory and motor axons
- intrinsic muscles & skin of back
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Term
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Definition
- An area of the skin innervated by a single spinal cord segment
- Sensory (Dorsal Root)
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Term
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Definition
- Muscle(s) innervated primarily by a single spinal cord segment
- most muscles have multiple segment innervation, but receive the majority of their innervation from one or two levels; damage to that level results in functional loss of the muscle
- Motor (Ventral Root)
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