Fig. 4.

Structural effects in layer V of the motor cortex opposite unilateral FLsmc lesions or sham operations in AC and MC rats.A, Acrobatic training after lesions (lesion–AC) significantly enhanced synapse number per neuron increases in comparison to the increases that were found as a result of the training alone (sham–AC) or as a result of the lesion in motor control rats (lesion–MC). B, Volume per neuron (the inverse of neuronal density) was significantly increased in sham–AC and lesion–MC in comparison to sham–MC. Volume per neuron was elevated but not significantly increased in lesion–AC relative to sham–AC and lesion–MC. C, There were no significant differences in the density of layer V synapses for any planned comparison. *p < 0.05.