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Spinothalamic
tract (STT)
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Lamina I
mostly high threshold
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input, fibers
cross to lateral
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funiculus many
projections
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ascend to the
thalamus carry
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pain and
temperature info
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Lamina V some
low and high
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threshold input,
fibers cross to
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anterior STT
many projections
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as ascends to
thalamus - also
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important in pain
signaling
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Spinoreticular
(SRT) and
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Spinomesencephalic
tract (SMT)
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Spinohypothalamic
tract (SHT)
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