Figure 2.

Loss of interjoint coordination in the absence of proprioception. A) Representative hand paths from a control participant and a deafferented patient when completing an out-and-back tracing movement in 6 different directions. B) Correlation between peak elbow joint acceleration and peak interaction torque during movement reversal for all 6 directions in two controls and two deafferented patients. C) Histograms of the range of interjoint coupling intervals (time between elbow and shoulder reversals) for controls and deafferented patients. Adapted with permission from [34]