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