Question

question 16 (2 points)
in cauda equina syndrome starting at s2 or below, which symptom is most likely?
severe bilateral leg weakness
saddle anesthesia with bladder dysfunction
hyperreflexia in lower limbs
upper motor neuron signs
question 17 (2 points)
at what level do the axons of the second - order neurons in the spinothalamic tract decussate?
medulla oblongata
pons
spinal cord, 1 - 2 segments above entry
midbrain

Explanation:

For Question 16, cauda equina syndrome starting at S2 or below often presents with saddle anesthesia and bladder dysfunction due to the involvement of the relevant nerve roots that control these functions. Severe bilateral leg weakness, hyperreflexia in lower limbs, and upper motor neuron signs are less characteristic at this level.
For Question 17, the axons of the second - order neurons in the spinothalamic tract decussate (cross over) in the spinal cord, 1 - 2 segments above the level of entry. The medulla oblongata, pons, and midbrain are not the levels of decussation for these axons.

Answer:

Question 16: Saddle anesthesia with bladder dysfunction
Question 17: Spinal cord, 1 - 2 segments above entry