Postural Instabilities and the Maintenance of Bi- manual Rhythmic Movement

摘要: Most research on bimanual rhythmic coordination has occurred with the participants in a seated posture. Many activities of daily living, however, require interaction standing postural and manual tasks. A population individuals that are ideal for studying integration task into ongoing control posture expert marching percussionists; they have learned to produce movements accurately under variety temporal constraints. The purpose current study was investigate percussionists. Participants (N=11) were recruited from University Massachusetts Drumline, asked perform three tasks [1:1, 2:3, 2:3-F (2:3 rhythm played faster at self-selected tempo)] one postures: sitting, foot, two feet. Discrete relative phase, time-to-contact, coherence analysis, used analyze performance task, control, between performance. Across all rhythms, discrete phase mean variability (SD) results showed no effects complexity (1:1 vs 2:3) had effect time-to-contact. However, increasing tempo vs. 2:3=F) did result decreased time-tocontact two-footed posture). Coherence analysis revealed coupling significantly as function (going footed posture) 2:3). Taken together, these demonstrate percussionists systematically decouple fluctuations order preserve movement task.