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17 Cards in this Set
- Front
- Back
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Pressure from bulging disc onto sensory fibers in the spinal nerve as it passes through the intervertebral foramen
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Sciatica
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Which fibers are most easily blocked by local anesthetics?
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C unmyelinated fibers
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Where are LPs done?
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L2-4 where cauda equina is, enlargement of subarachnoid space in sacrum (lumbar has fat)
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Dermatones
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C1: none
C5: arm C6: thumb & lateral forearm C7: middle finger C8: pinky T4: nipple T10: umbilicus |
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Nissl stain
Weigert stain |
Cell bodies & neurons darkly stained
White myelinated mater is darkly stained |
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Know Lamina
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PMN: I
SG: II NP: III, IV, V Clarke's: VII IML: VII Somatic: IX |
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Cuneate fasciculi found?
Gracile fasiculi |
Only in T4 and above regions
In all regions |
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What fasiculi contains unmyelinated type C sensory afferent fibers (pain & temp)
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Dorsolateral (lissauer's zone)
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Clarke's nucleus found
Intermediolateral nucleus Somatic motor nuclei |
T1-L2
T1-L2 In cervical & lumbar (not thoracic) |
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Primary sensory axons enter SC at the dorsal root entry zone and rerrange into two bundles
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1. Medial division: contains large diameter, rapidly conducting myelinated fibers that terminate in brainstem.
2. Lateral division: small diameter, slowly conducting fibers which enter Lissauer's zone and end in gray matter. |
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When does posterior intermediate sulcus appear?
When do we see intermediolateral cell column? Where are there no lateral motor columns? Where are Clarke's nucleus present? |
C8
T2-T12 Thoracic level Thoracic level |
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What supplies the dorsal root ganglia, cord (especially the lumbar enlargement)?
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Radicular arteries
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Occlusion of Artery of adamkiewicz
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damage to lower thoracic and lumbar spinal cord and neurological impairment of the lower limbs.
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What supplies the outer rind of white matter?
Gray matter? |
Vasocorona
Ant. spinal a |
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Occlusion of anterior spinal artery?
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extensive gray/white matter damage
Dorsal columns spared so MVP ok |
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Gray matter is mostly supplied by the
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central branch of the anterior spinal a
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Infarch of the anterior spinal artery damages the spinal gray matter, impares SC motor function, but spares the dorsal columns
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Anterior spinal syndrome
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