Fig. 8.

Distribution of best directions of units in BI.Bars of histograms denote bins of 18°, the angular separation between experimental targets. Superimposed on one histogram is the “continuous” (bin width of 1°) distributions of best directions. a, Distribution of best directions as found from the threshold line. Data are pooled from all subjects and include only the best direction. Three clusters were found as marked in the histogram by horizontal, dashed lines. The second plot shows the distribution of units of each group in the muscle. Members of a group were not constrained to a specific area in BI. b, Distribution of best directions (pooled data) as found from the direction of minimum threshold force. Note the wider range of best directions when compared with that ofa.