If the patient's dorsal columns are not functioning, the nurse will observe which of the following responses during neurotesting,
where the nurse asks the patient to close his eyes and then proceeds to touch corresponding parts of the body on each side simultaneously with two sharp points?
A)
Grimacing when body touched with sharp points
B)
No response to two-point discrimination
C)
Heightened proprioceptive response
D)
Inability to identify which way his finger was moved during the test
Ans:
B
Feedback:
When comparing the discriminative dorsal column-medial lemniscus pathway with anterolateral tactile pathways with testing (with eyes closed), gently brush the skin with cotton, touch an area with one or two sharp points, touch corresponding parts of the body on each side simultaneously or in random sequence, and passively bend the person's finger one way and then another. If dorsal columns are not functioning, the tactile threshold two-point discrimination and proprioception are missing, and the person has difficulty discriminating which side of the body received stimulation.
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