When an actor performs a rhythmic limb movement while observing a spatially incongruent movement he or she exhibits increased movement orthogonal to the instructed motion. Known as rhythmic movement interference, this phenomenon has been interpreted as a motor contagion effect, whereby observing the incongruent movement interferes with the intended movement and results in a motor production err...

Interlimb rhythmic coordination is reflectionally symmetric when the left and right limb segments are identical in uncoupled frequencies and spatial orientation. In the present studies (4 experiments, with a total of 31 participants), when reflectional symmetry was broken through differences in timing (frequency), the resulting stable states were related by reflection and were identical for pai...

People with lower limb amputations struggle through difficulties during locomotion in their daily activities. transtibial take support from prosthetic legs for systematic movement. During motion, they experience some mobility issues while using general limbs regarding gait pattern. The design of a prosthetic-controlled synchronization physically disabled persons is the main goal present researc...

Submitted for the MAR16 Meeting of The American Physical Society Robotic and mathematical modeling reveal general principles of appendage control and coordination in terrestrial locomotion1 BENJAMIN MCINROE, UC Berkeley, HENRY ASTLEY, Georgia Tech, CHAOHUI GONG, CMU Robotics Institute, SANDY KAWANO, NIMBioS, PERRIN SCHIEBEL, Georgia Tech, HOWIE CHOSET, CMU Robotics Institute, DANIEL I GOLDMAN, ...

Studies of coordination in rhythmic limb movement have established that certain phase relationships among cycling limbs are preferred, i.e. patterns such as synchrony and anti-synchrony are produced more often and more reliably than arbitrary relations. A speech experiment in which subjects attempt to place a phrase-medial stress at a range of phases within an overall phrase repetition cycle is...

This study aims to investigate the effects of shoe traction and obstacle height on lower extremity relative phase dynamics (analysis of intralimb coordination) during walking to better understand the mechanisms employed to avoid slippage following obstacle clearance. Ten participants walked at a self-selected pace during eight conditions: four obstacle heights (0%, 10%, 20%, and 40% of limb len...

BACKGROUND Of all patients with low back pain, 85% are diagnosed as "non-specific lumbar pain". Lumbar instability has been described as one specific diagnosis which several authors have described as delayed muscular responses, impaired postural control as well as impaired muscular coordination among these patients. This has mostly been measured and evaluated in a laboratory setting. There are ...

An experiment was conducted to study the skill of clay kneading in pottery. This task usually requires a few years to master and is therefore well suited to study the long-term development of a complex motor skill. Participants' kneading movements were measured in 3D using a motion capture device and phase relations among coordinates and joint angles were analyzed in terms of the mutual phase r...

The tendency for movements of the upper limbs to be drawn systematically toward one another and to follow similar spatiotemporal trajectories is well known. Although suppression of this tendency is integral to tasks of daily living, its exploitation may prove to be critical in the rehabilitation of acquired hemiplegias. In general, however, the task-related factors that determine the degree of ...

The subthalamic nucleus (STN) is the main target for neurosurgical treatment of motor signs of Parkinson's disease (PD). Despite the therapeutic effect on both upper and lower extremities, its role in motor control and coordination and its changes in Parkinson's disease are not fully clear. We intraoperatively recorded single unit activity in ten patients with PD who performed repetitive feet o...