Fig. 4
Activation of M1 ensembles before and after cerebellar stimulation. a Correlation matrix eigenvalues calculated from spontaneous activity prior to cerebellar stimulation. The dashed line is the signal threshold (λmax), defined as the theoretical upper bound for a randomized spike train. Three PCs have eigenvalues greater than λmax. b The weight of each neuron contributing to the first principal component (or ensemble) in a. c Example of activation events of an M1 ensemble prior to and after cerebellar stimulation (i.e., Stimpre and Stimpost). d Across all animals, there was a significantly stronger activation of M1 ensembles post stimulation (average of top 20th percentile activation events in Stimpre and Stimpost blocks, *p < 10–115)