Key result
Muscle fatigue reduces amplitude and increases latency of finger reflexes versus non-fatigue conditions.
Why the study?
The effect of muscle fatigue on background EMG activity and reflex responses in finger extensor and flexor muscles during sustained co-contraction was unclear.
Population
Healthy human subjects holding the index finger semi-extended
Comparison
Fatigue induced by sustained co-contraction vs non-fatigue with similar background EMG levels
Design
Experimental study measuring EMG and reflex responses
Authors
Loading...
Fatigue-related reflex changes warrant caution in neuromuscular testing; leaves open their impact on motor performance or injury risk.
Muscle fatigue reduces the servo-like action of unloading and stretch reflexes in human finger extensor and flexor muscles.
Hagbarth et al. (1995) studied Healthy. Muscle fatigue vs. Non-fatigue conditions was evaluated on Reflex responses to torque pulses (unloading reflex in extensor and stretch reflex in flexor). Muscle fatigue significantly reduced the amplitude and increased the latency of the unloading and stretch reflexes in finger muscles compared to non-fatigue conditions.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: