Figure 3
Spatial patterning and longitudinal stability activity from contractions of left wrist extensor (ECR: extensor carpi radialis). Longitudinal stability is considered relative to how often a channel is measured as active relative to the number of experiment sessions (11 total). (A) Frequency of activity across sessions for each channel distributed over arrays B and C (top: motor; bottom: sensory). Color code denotes the percentage of sessions (of 11) that a given channel was active, with higher percentages corresponding to greater longitudinal stability. (B) Probabilities that any active channel on Pedestals B and C responded for more than n sessions, within contralateral (left panel) and ipsilateral (right) hemispheres. Motor and sensory areas are pooled. Dashed lines mark the median number of sessions responsive among channels within the active footprint of each hemisphere. (C) Probabilities that any active channel on Pedestals B and C (mapped in panel A) responds for more than n sessions, measured for motor (left panel) and sensory (right) areas (hemispheres pooled). For example, a channel active for exactly 2 out of 11 possible sessions would be counted in the bars for both n = 1 and n = 2. Dashed lines mark the median number of sessions that a given channel in the active footprint of each area responds. (D) Distributions of the number of total sessions a channel responds to attempted left wrist extensions, by hemisphere. The median number of sessions a channel was observed responsive was greater within the contralateral than the ipsilateral hemisphere (nMedian, Co–nMedian, Ip = 5 sessions; p < 0.001). (E) Distributions of the number of total sessions a channel responded to attempted left wrist extensions (among all channels in active footprint), by area. The median number of sessions a channel within the active footprint was observed responsive was greater among sensory than motor arrays (nMedian, M1–nMedian, S1 = -2 days, p = 0.183).
