Fast and accurate edge orientation processing during object manipulation
- Western University, Canada
- Umea University, Sweden
- Queen’s University, Canada
- Queen's University, Canada
Figures
Figure 1 with 1 supplement
Experimental approach.
(a) Four principle phases of the pointer-alignment trials. (b) Photograph of the apparatus. (c) The left panel shows a top-down schematic view of the dial and pointer along with an exemplar …
Figure 1—figure supplement 1
Participants quickly learned the tactile pointer-alignment task.
The horizontal axis shows the actual sequence of tactile pointer-alignment trials performed by each participant, starting with the infinite edge practice block (Pr), followed by three experimental …
Figure 2
Alignment accuracy during tactile pointer-alignment trials.
(a) Distribution of the alignment error for the various edge lengths for all trials by all ten participants (108 trials/participant and edge length). Gray segments of the distributions refer to …
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Figure 2—source data 1
Underlying data points for Figure 2b, d and f.
- https://doi.org/10.7554/eLife.31200.006
Figure 3 with 1 supplement
Contact behavior and temporal parameters in tactile pointer-alignment trials.
(a,b) Time of onset of the orienting of the dial (‘Rotation onset time’) and the time when the contact force reached its plateau-like state (‘Time of contact force increase’) as a function of edge …
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Figure 3—source data 1
Underlying data points for Figure 3a–e.
- https://doi.org/10.7554/eLife.31200.009
Figure 3—figure supplement 1
Presence of sub-movements did not influence alignment accuracy or direction errors in the tactile pointer-alignment task.
(a) Identification of movement components in the dial rotation. Top panel: Pointer position and dial rotation velocity shown for an exemplar trial (30° initial dial orientation) that we found to …
Figure 4 with 1 supplement
Comparing performance in the visual and the tactile pointer-alignment tasks.
(a) Distribution of the alignment error during the visual (gray) and tactile (black) pointer-alignment tasks for all trials by all ten participants (108 trials/participant and task). (b) Absolute …
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Figure 4—source data 1
Underlying data points for Figure 4b.
- https://doi.org/10.7554/eLife.31200.012
Figure 4—figure supplement 1
Comparing performance in the visual and tactile pointer-alignment tasks.
(a) Absolute alignment error as a function of initial dial orientation in the tactile (black) and visual (gray) pointer-alignment task, which involved the infinite edge and raised dot, respectively. …
Figure 5 with 1 supplement
Neural mechanisms for edge orientation processing.
(a) Schematic of a 5 × 5 mm square area on the skin surface. The gray lines and circles represent papillary ridges and mechanoreceptive end organs, respectively. Three colors of filled dots …
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Figure 5—source data 1
Underlying data points for Figure 5c.
- https://doi.org/10.7554/eLife.31200.016
Figure 5—figure supplement 1
Schematic and flow chart of discrimination model.
The top panel shows how the receptive field maps were constructed. For both model types, the receptive field diameters (dRF) were chosen from the same lognormal distribution (see Materials and …
Videos
Video 1
Our apparatus and a few sample trials.
https://doi.org/10.7554/eLife.31200.013Additional files
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Transparent reporting form
- https://doi.org/10.7554/eLife.31200.017
