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18 Cards in this Set
- Front
- Back
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in adults, spinal cord ends at ___ or ___
terminal part of SC is ___ |
L1
L2 conus medullaris |
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conus medullaris is apically connected to dura by ___, which is made of ___.
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filum terminale
pia |
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filum terminale is covered by dura from ___ and below, from which point it's called ___
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S2
coccygeal ligament |
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# of spinal nerve roots at the levels:
cervical thoracic lumbar sacral coccygeal |
8
12 5 5 1 |
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SC has an anterior median ___ and a posterior median ___
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fissure
sulcus |
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grey matter of spinal cord is organized into 10 ___
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laminae of Rexed
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lamina 2 is in ___ of SC and contains ___
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dorsal horns
substantia gelatinosa |
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cells in substantia gelatinosa receive inputs via ___ and send axons via ___.
the axons decussate ___ly. |
zone of Lissauer
spinothalamic pain pathway immediately |
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lamina 7 contains ___ and ___
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intermediolateral nucleus
nucleus dorsalis of Clarke |
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intermediolateral nucleus sends axons to ___
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sympathetic chains
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nucleus dorsalis of Clarke sends fibers to ___
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posterior spinocerebellar tract
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posterior spinocerebellar tract is located in the ___ o-clock position of the SC at ___ displacement from center and carries ___ information
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10 and 2
maximum proprioceptive |
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lamina 9 is located in ___ and contains ___ neurons
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anterior grey horns
alpha and gamma motor |
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in lamina 9, neurons innervating flexors are ___ with respect to those innervating extensors
neurons innervating proximal muscles are ___ with respect to those innervating distal muscles |
dorsal
medial |
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80-90% of corticospinal fibers travel in ___ tract. this is located at ___ o'clock and at ___ displacement from center. it carries ___ information.
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lateral corticospinal
9:30 and 2:30 voluntary motor |
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2 ascending fasciculi of posterior funiculus. they transmit ___ (3) information
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cuneatus
gracilis deep touch vibration proprioception |
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cuneatus is only present above ___. it is separated from gracilis by the ___.
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T6
posterior intermediate sulcus |
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intermediolateral horn is most distinct at ___ level
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thoracic
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