Table 1.

Influence of recording conditions on MUA-based prediction accuracy

Parameter	Median	95% range	Sample size	CCa	p value (t test)
Electrode depth	0.58 mm	0–4 mm	471	0.044	0.17
Electrode impedance	0.9 MΩ	0.35–1.8 MΩ	471	0.13	0.003
Electrodes per session	12	4–16	41	0.39	0.008
Within-region separationb	0.81 mm	0.35–1.1 mm	82	−0.004	0.49
Inter-region separationc	8.02 mm	2.6–14.1 mm	41	−0.45	0.002

^aCCs were computed between each parameter and the overall prediction accuracy.

^bFor each session, prediction accuracies and mean pairwise interelectrode distances were computed separately for MUAs recorded by each guide tube, aimed toward PMd and PMv (see Materials and Methods).

^cFor each session, distances were computed between the centers of each of the two sampled regions.