Figure 5

CD11b immunoreactive (red) microglia in the motor cortex following cervical corticospinal tract injury. Representative images of motor cortex - a, b: one week (deconvolved images); c, d: two weeks following corticospinal tract injury. The corticospinal neurons were retrogradely labelled with fluorogold applied to the spinal cord at the time of injury. There is little sign of microglial activation. The inset in (c) shows a CD6-positive T-cell in the motor cortex, but no accumulation of such cells was detected.