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. 1999 Aug 31;96(18):10418–10421. doi: 10.1073/pnas.96.18.10418

Figure 2.

Figure 2

Mean SI (amount that the visual RF shifted when the arm was moved) under three conditions: first, when the arm was uncovered and the monkey had both visual and proprioceptive information about arm position; second, when the arm was covered and the monkey had only proprioceptive information about arm position; and third, when the monkey’s arm was stationary and blocked from view, and a detached, stuffed monkey arm was placed in view and moved to two different positions. N = number of neurons per mean. Error bars are standard error of the mean. The SI for Arm Uncovered was significantly greater than zero: mean = 0.18, SEM = 0.04, t = 4.97, P < 0.0001. The SI for Arm Covered was significantly greater than zero: mean = 0.08, SEM = 0.03, t = 2.75, P < 0.01. The SI for Visual + Proprioceptive was significantly greater than the SI for Proprioceptive: t test for correlated data, t = 2.77, P < 0.05, adjusted with the Bonferroni correction for multiple tests. The SI for Fake Arm was significantly greater than zero: mean = 0.12, SEM = 0.06, t = 2.20, P < 0.05.