Posterior parietal cortex estimates the relationship between object and body location during locomotion
- Simon Fraser University, Canada
- Université de Montréal, Canada
Figures
Figure 1
Behavioral Measures.
(A) Section of data illustrating, from top to bottom: the activity of the left and right brachialis (lBr and rBr); the distance-to-contact (DTC) and the time-to-contact (TTC) with respect to the …
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Figure 1—source data 1
Source data for box plots in Figure 1C,D.
- https://doi.org/10.7554/eLife.28143.004
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Figure 1—source code 1
Script for data in Figure 1.
- https://doi.org/10.7554/eLife.28143.005
Figure 2
Location of recording tracks.
(A,B) Postmortem photographs of the rostral aspect of the brains of PCM7 (A) and PCM9 (B) (dorsal views). Circles superimposed on these photographs show the location of the recording tracks in each …
Figure 3 with 1 supplement
Discharge of an example cell during the matched and visual dissociation tasks.
(A,B) Cell discharge during left and right limb lead condition. For each task, we illustrate the average discharge in the form of peri-event histograms (PEHs), together with the raster of cell …
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Figure 3—source data 1
Source data for graphs in Figure 3D.
- https://doi.org/10.7554/eLife.28143.009
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Figure 3—source code 1
Script for data in Figure 3.
- https://doi.org/10.7554/eLife.28143.010
Figure 3—figure supplement 1
Detection of bursts of unit activity in individual trials.
From top to bottom: averaged peri-event histogram (PEH) of cell activity; individual trials in the form of rasters and instantaneous frequency; averaged activity of the coBr and iBr. Data trials …
Figure 4
Relationship of cell discharge onset to distance and time (individual examples).
A and C show two examples of cell discharge in the unobstructed (blue line), matched (red), and visual dissociation (green) task in the left limb leads condition, together with traces indicating DTC …
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Figure 4—source data 1
Source data for Figure 4B.
- https://doi.org/10.7554/eLife.28143.012
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Figure 4—source data 2
Source data for Figure 4D.
- https://doi.org/10.7554/eLife.28143.013
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Figure 4—source code 1
Script for data in Figure 4.
- https://doi.org/10.7554/eLife.28143.014
Figure 5 with 1 supplement
Relationship of cell discharge onset to distance and time (population analysis).
(A) Cells showing both a significant effect of TTC (left, cyan lines) and a non-significant effect of DTC (middle and right, cyan lines). (B) Cells showing a significant effect of DTC (left, red …
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Figure 5—source data 1
Source data for graph in Figure 5D.
- https://doi.org/10.7554/eLife.28143.017
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Figure 5—source data 2
Source data for graphs in Figure 5C,E.
- https://doi.org/10.7554/eLife.28143.018
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Figure 5—source code 1
Script for data in Figure 5.
- https://doi.org/10.7554/eLife.28143.019
Figure 5—figure supplement 1
Bootstrapped data for index of TTC- and DTC-related cells.
For each cell, we used a replacement protocol to create 1000 datasets for each DTC- and TTC-related cell included in Figure 5D. We treated data for the matched and visual dissociation tasks …
Figure 6 with 1 supplement
Relationship of cell discharge onset to distance and time (population averages).
(A,D) Five example cells illustrating that the changes in cell discharge in the different populations begin at staggered times preceding the step over the obstacle. Cell discharge patterns taken …
Figure 6—figure supplement 1
Additional population averages.
(A,B) Two examples of distance-related cells during left limb lead condition. Both examples show an earlier onset of activity during the visual dissociation task (green trace) than in the matched …
Figure 7 with 3 supplements
Effect of obstacle acceleration on behavior and cell discharge.
A and B illustrate the distance of the cat from the obstacle at the onset of flexor muscle activity in the left and right limb lead condition (same representation as in Figure 1). The filled box …
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Figure 7—source data 1
Source data for box plots in Figure 7A.
- https://doi.org/10.7554/eLife.28143.026
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Figure 7—source data 2
Source data for box plots in Figure 7B.
- https://doi.org/10.7554/eLife.28143.027
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Figure 7—source code 1
Script for data in Figure 7.
- https://doi.org/10.7554/eLife.28143.028
Figure 7—figure supplement 1
Effect of acceleration on gait pattern.
The figure repeats the data from the top part of Figure 7A with the addition of cat figurines to better illustrate the change in the gait pattern produced by the acceleration in the 1L condition. (A)…
Figure 7—figure supplement 2
Relationship between time and distance for the visual dissociation and the 1L acceleration task.
The two traces at the top repeat the display of cell activity from Figure 7C during the visual dissociation task (green) and during acceleration (purple). The graph shows the relationship between …
Figure 7—figure supplement 3
Relationship between time and distance for the visual dissociation and the 2R acceleration task.
Figure organized as for Figure 7—figure supplement 2. The green arrow indicates the distance of the obstacle (29.7 cm) at the onset of the cell discharge during the unperturbed visual dissociation …
Figure 8
Examples and summary of effects of acceleration.
(A,B) Example discharge of two DTC-related cells to acceleration of the obstacle in the 1L condition. (C) Example of a TTC-related cell to acceleration in the 1L and the 2L conditions. Figures …
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Figure 8—source data 1
Source data for graphs in Figure 8D,E.
- https://doi.org/10.7554/eLife.28143.030
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Figure 8—source data 2
Source data for graph in Figure 8F.
- https://doi.org/10.7554/eLife.28143.031
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Figure 8—source code 1
Script for data in Figure 8.
- https://doi.org/10.7554/eLife.28143.032
Figure 9 with 1 supplement
Population activity during obstacle acceleration.
(A,B) Population discharge activity is shown for all cells for which we applied the 1L and 2R protocols. Green traces show averaged activity in the visual dissociation task; the purple trace …
Figure 9—figure supplement 1
Population averages during acceleration task.
(A) 1R condition. (B) 2L condition. Data are organized as for Figure 9.
Figure 10
Conceptual model illustrating a possible mechanism for limb selection.
Left (A) and right (B) limb lead conditions. The top parts of A,B show activity on the left side of the brain and the bottom parts of A,B, show activity on the right side of the brain. In each part …
Additional files
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Transparent reporting form
- https://doi.org/10.7554/eLife.28143.036
