Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology
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Comparative Study
Experimental pain has a greater effect on single motor unit discharge during force-control than position-control tasks.
When matching target force during pain, single motor unit (SMU) discharge is modified in a manner thought to redistribute load in painful tissue. This adaptation might not be appropriate when maintaining joint posture against an external load. We compared changes in SMU discharge rate of knee extensor muscles in a force-control and a position-control task during pain. ⋯ Simplistic theories of pain adaptation of movement during voluntary efforts cannot be extrapolated to more postural functions. This has implications for understanding movement changes that may underpin persistence/recurrence of pain and the management of musculoskeletal pain.
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To investigate whether the latent neural correlates of incentive processing differ between problem gamblers (PGs) and healthy controls (HCs). ⋯ The finding that PGs are hyposensitive to reward and punishment provides valuable insight into the nature of deficit in this disorder, and provides a foundation for future research and clinical interventions.