(a) The right hindpaw representation in the primary somatosensory cortex (S1HL) seed network is shown for each group (top row = sham, bottom raw = SCI) before surgery (baseline) and 3, 7 and 14 days after surgery. Images were thresholded at a T-value of 3 to highlight the extent of the network, and they were masked by the combined baseline scans for both groups. (b) Hindpaw (dorsal surface) mechanical withdrawal thresholds decrease over time and hypersensitivity develops bilaterally after SCI. All values means ± SE; *, statistically significant difference, P < 0.001. Brain images are shown in neurological convention: left side of the image is left side of the brain.