Fig. 6: Neural population embedded sequential modulation during the preparatory period.
From: Multiplicative joint coding in preparatory activity for reaching sequence in macaque motor cortex
a Projection on SR space. Neural states of SR trials (n = 125) were clearly clustered according to their reaching directions. b Neural states of DR trials (n = 614) also clustered into six groups according to their first reach direction when projected onto the SR space. The explained variances of the two dimensions were calculated. c LDA classified neural states of trials with the same first reach direction into clusters grouped by second reach directions, forming an initial state space for the subsequent movement. Colors indicate the first movement directions; DR trials are presented in the same color family of related SR trials. Markers indicate the second reaching direction. The ellipses show the covariance projection of related conditions. d Decoding accuracy for both reach directions in double-reach trials, using monkey C array DR trials. Trial conditions were shuffled 100 times to calculate permutation levels which are plotted in light shade curves.
