Figure 3.

Exercise increased the response magnitude of cells in the infragranular hindlimb cortex to forelimb stimulation in spinalized rats. A, Examples of peristimulus time histograms showing the responses of four infragranular hindlimb cells recorded simultaneously from each of three stimulus locations: forepaw digit 2 (FD2), forepaw palm pad 5 (FPL5), and forelimb (FL). B, The average response magnitude of infragranular cells within the hindlimb somatosensory cortex of exercised spinalized rats (0.4408 ± 0.12 spikes/stimulus, N = 10 rats) was greater than that of normal rats (0.3625 ± 0.002 spikes/stimulus, N = 9 rats); ***p < 0.001. C, No differences were observed between the first bin latency of exercised spinalized rats (22 ± 0.4 ms) versus that of normals (24 ± 0.08 ms) or the last bin latency of exercised spinalized rats (47 ± 0.8 ms) versus that of normals (48 ± 0.13 ms). Error bars indicate SEM.