Which one of the following are ascending tracts by which neurons reach the midbrain, reticular formation, and limbic areas?
A. Spinoreticular
B. Spinomesencephalic
C. Spinothalamic
D. All of the above
ANS: D
Rationale: The axons of ascending projection neurons reach the midbrain, reticular formation, and limbic areas via three parallel tracts in the anterolateral spinal cord: (1) spinomesencephalic, (2) spinoreticular, and (3) spinolimbic.
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