Table 1.

Summary of results from the reaching task

Location	Total number of electrodes	Significant electrodesa		Mean ΔPACb
		$\mathrm{M}{\mathrm{I}}_z$	$R_{\mathrm{PAC}}$	$\mathrm{\Delta }\mathrm{M}{\mathrm{I}}_z$	$\mathrm{\Delta }{R}_{\mathrm{PAC}}$
CM1	2,942	2,728 (92.7%)	2,899 (98.5%)	10.16	0.10
MM1	5,435	4,548 (83.7%)	4,188 (77.1%)	6.74	0.049
MS1	4,351	3,633 (83.5%)	3,194 (73.4%)	0.87	0.0076

^a Number and proportion of electrodes with significant phase–amplitude coupling (PAC), measured using the z-scored modulation index $(\mathrm{M}{\mathrm{I}}_z)$ or the GLM framework $(R_{\mathrm{PAC}})$ during either the baseline or reach-onset interval.

^b The mean change $(\mathrm{\Delta })$ in PAC ( $\mathrm{M}{\mathrm{I}}_z$ or $R_{\mathrm{PAC}}$) per electrode between the baseline and reach-onset intervals (i.e., baseline minus reach onset). CM1, M1 of monkey C; MM1, M1 of monkey M; MS1, S1 of monkey M.