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← Human Body & HealthWhich event reduces touch discrimination on fingertips following prolonged compression?
A)Decreased mechanoreceptor firing frequency✓
B)Increased somatosensory cortex inhibition
C)Elevated circulating histamine levels
D)Compromised dermal collagen matrix function
💡 Explanation
Decreased firing occurs because prolonged compression desensitizes the mechanoreceptors via adaptation that reduces action potential firing. This sensory adaptation changes signal transduction, therefore reducing sensitivity and the precision of discrimination, rather than other general inflammatory or cortical mechanisms.
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