Figure 1. Schematic showing the receptive field of a neuron in the somatosensory cortex of the flying fox (bat). Top row: Black area on the digit of the wing of the flying fox shows the excitatory receptive field of a neuron in the somatosensory cortex before the digit was amputated. Bottom row: Black area on the wing of the flying fox shows the shift in the excitatory receptive filed of the same neuron after the digit is amputated. Following amputation, the neurons rapidly shifts its receptive field the region of the wind adjacent to the amputated digit. These results suggest that digit amputation unmasks some of the preexisting excitatory inputs to the neuron.