Article Figures & Data
Figures
- Figure 1.
The apparatus and experimental design. A, B, Schematic drawings of the experimental setup. C, Experimental design for each group of participants (see Materials and Methods for further information).
- Figure 2.
Representative trials. A, First trial while moving the unfamiliar object in the channel. B, First trial, after prior experience in the channel, while moving the same object without the channel. The same participant, from Group B, performed both trials. Note that although arm and object movements were relatively straight in A, the coupling between grip force and load force was weak. Conversely, in B, movements were altered but the coupling between grip force and load force was strong.
- Figure 3.
Mean grip-load force coupling as a function of trial and group. A, Average correlation coefficients between grip force and load force while experiencing the object in the channel. B, Average correlation coefficients between grip force and load force when moving the object without the channel. Dashed lines represent exponentials fit to the data. The comparison between the 3 groups indicates that prior experience moving in the channel (Groups B and C) benefited grip-load coupling. Error bars correspond to 1 SE.
- Figure 4.
Mean peak-to-peak lateral deviation of the wrist, as a function of trial and group, when moving without the channel. The dashed lines represent exponentials fit to each series of data points. Error bars correspond to 1 SE.
- Figure 5.
Mean grip-load force coupling as a function of trials for Group D when moving in the channel. The correlation between grip force and load force is presented at the beginning and end of each session (each one requiring a different movement speed). Note that grip-load force coupling generalized well across movement speeds. Error bars correspond to 1 SE.
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