Center for Cognition, Action, and Perception, Department of Psychology, University of Cincinnati, Cincinnati, OH, USA.
Neurosci Lett. 2011 Sep 8;502(1):13-7. doi: 10.1016/j.neulet.2011.07.012. Epub 2011 Jul 20.
Precision manual tasks require a stable postural background which might be facilitated by respiratory modulations. We investigated the influence of performing a manual precision aiming task on respiratory rate and dynamics, and the coherence between respiration and center of pressure (COP) fluctuations (i.e., the postural-respiratory synergy). Participants aimed a pointer at targets of different sizes while seated or standing. Respiratory rate increased during the aiming period compared to a pre-task phase, but did not vary as a function of aiming difficulty. Recurrence quantification analysis revealed an increased incidence of slowly changing periods of chest movements during the most difficult aiming condition, which required the highest level of manual precision. Aiming, irrespective of difficulty, led to increases in the regularity of the respiratory pattern. Increases in respiratory rate during aiming were accompanied by an increased level of coherence for the seated but not the standing posture, suggesting that task demands affect the organization of coordination across the postural-respiratory synergy. Functional demands of the task likely shape the effectiveness of compensation for respiration during precision aiming.
精确的手动任务需要稳定的姿势背景，呼吸调节可能有助于稳定姿势背景。我们研究了执行手动精确瞄准任务对呼吸频率和动力学的影响，以及呼吸和身体重心（COP）波动之间的相干性（即姿势-呼吸协同作用）。参与者在坐姿或站姿下用指针瞄准不同大小的目标。与任务前阶段相比，瞄准期间的呼吸频率增加，但与瞄准难度无关。递归定量分析显示，在最困难的瞄准条件下，胸部运动的缓慢变化期发生率增加，这需要最高水平的手动精度。无论难度如何，瞄准都会增加呼吸模式的规则性。在瞄准过程中呼吸频率的增加伴随着坐姿但不是站姿的相干水平的增加，这表明任务需求会影响姿势-呼吸协同作用的协调组织。任务的功能需求可能会影响在精确瞄准过程中呼吸补偿的有效性。
