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← Human Body & HealthIf a patient experiences numbness following spinal anesthesia, which consequence most likely occurs within touch sensation?
A)Increased mechanoreceptor action potentials
B)Disrupted dorsal column signal transmission✓
C)Enhanced somatosensory cortex excitation
D)Elevated Pacinian corpuscle adaptation rate
💡 Explanation
Spinal anesthesia disrupts nerve signal transmission. The dorsal column pathway relays fine touch, vibration, and proprioception; blocking these signals causes numbness because the transmission of sensory information to the brain is inhibited, therefore affecting touch perception rather than altering receptor potentials or cortical excitation.
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