The role of the cerebellar cortex in motor learning was investigated by comparing the
paramedian lobule of adult rats given difficult acrobatic training to that of rats that had been
given extensive physical exercise or had been inactive. The paramedian lobule is activated
during limb movements used in both acrobatic training and physical exercise. Acrobatic
animals had greater numbers of synapses per Purkinje cell than animals from the exercise
or inactive groups. No significant difference in synapse number or size between the …