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Between what spinal levels does the interomediolateral grey horn?
T1-L2/3
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Where is the dorsal median sulcus located?
between the dorsal funiculi
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At what level does the dorsal funiculi get divided into bundles called fasiculi?
T7
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What fasiculi lies laterally and carries sensory information from the upper half of the body?
Fasiculus Cuneatus
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What fasiculi lies medially and carries sensory information from the bottom half of the body?
Fasciculus gracilis
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What tract carries Crude touch, pain, temp, and itch information from the periphery?
- Antrolateral (GSA)
- AKA: spinothalmic, Spinotectal, spinorecticular
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What part of the grey matter are lamina 1-5 located?
Dorsal horn
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What lamina is also known as the dorsolateral tract of lissaur, inhibits adjacent segments to localize pain?
Lamina I
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What does the lateralcorticospinal fiber do?
- At some level it is conscious
- (inhibits reflex)
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What does a renshaw cell do?
Receives excitatory stimuli from motor neuron, it then inhibits that motorneuron from firing again
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What fiber comes from the contralateral side of the cord and cause the contraction of the opposite foot when stepping on glass?
SP fiber
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What fiber is responsible for inhibiting the antagonist muscle during contraction?
1A
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What dorsal nucleus lies more laterally and carries sensory information from the upper half of the body?
Fasciculus cuneatus
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What dorsal nucleus lies medially and carries sensory information from the lower half of the body (below t6)
Fasciculus gracilis
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What lamina is know as sustantia gelatinosa, contains small compact neurons, and is used to diminish pain?
Lamina II
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Which lamina contains dendrites that extend into two and three, Axons cross midline and enter contralateral spinothalmic tract contain pain fibers from the periphery
Lamina IV and V
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which lamina includes nucleus dorsalis (clark's column), has nurons forming the dorsal and ventral spinocerebellar tracts, and is in charge of balance, coordination and proprioception?
lamina VII
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what lamina has dendrites and lamina 8 and has many motor neurons, give rise to phrenic and accessory nerve?
Lamina IX
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What nucleus is in lamina I?
posteromarginalis
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What nucleus is in lamina II?
Substantia gelatonosa
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Where are the subdivisions of motor cell columns located?
lamina IX
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What are the three sources of descending fibers in the dorsal funiculus?
- neurons in gracile and cuneate nuclei
- spinal grey
- DRG
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What tracts are located within the dorsolateral fasiculus?
- Lateral corticospinal tract
- Rubrospinal tract from red nucleus
- Dorsal spinocerebellar tract
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What tract is located in the dorsolateral fasciculus and is main concerned with limb movement (inhibitory)?
lateral corticospinal tract
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What dorsolateral tract is small and terminates at C6?
Rubrospinal tract from red nucleus
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What dorsolateral tract has unconscious proprioception, balance and coordination?
Dorsal spinocerebellar tract
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What tracts are within the ventrolateral fasciculus?
- Spinothalmic (crude touch)
- spinotectal (reflexive response)
- spinoreticular (Alertness, awareness)
- spino-olivary
- ventral spinocerebellar
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In what direction do all Ventral funiculi run?
ALL DESCENDING
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What are the five tracts of the ventral funiculus?
- Ventral corticospinal
- ventral vestibulospinal
- recticulospinal tract
- medial longitudianl fasciculus from medial vestibular nucleus
- tectospinal
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What ventral funiculus tract does not decussate in the medulla and is mainly concerned with trunk movement?
Ventral corticospinal
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What ventral tract mediates equilibrium, and terminates in lamina VIII, VII, IX?
Ventral vestibulospinal
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