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. Author manuscript; available in PMC: 2013 Dec 6.
Published in final edited form as: Neuron. 2012 Dec 6;76(5):1021–1029. doi: 10.1016/j.neuron.2012.10.030

Figure 4. The Directional Bias of Local PRR Neurons Explains the Bias of the Inactivation Deficit.

Figure 4

(A) Average reach amplitude reduction after inactivation (mean ± SEM) for the contralesional versus ipsilesional targets in the memory-guided reach task.

(B) Histogram of the preferred reach directions of spiking units within 1 mm from the inactivation cannula. Arrows indicate the population mean.

(C) Population vector (red arrow), i.e., the sum of all blue arrows, each scaled down by a factor of 20, for each of the six targets. Each blue arrow represents the activity of an individual spiking unit in its preferred direction with the amplitude of the mean activity for a given target.

(D) Average reach amplitude reduction (magenta) and population vector amplitude (cyan) for each of the six targets. Both lines are normalized respectively so that their maximum is 1. See also Figure S3.