Figure 3
From: What makes man human: thirty-ninth James Arthur lecture on the evolution of the human brain, 1970
These responses were obtained on sciatic stimulation after complete resection of Cerebellum plus additional resection of cortex of both postcentral gyri. Upper trace, post-Central exposed decorticated white matter; lower trace, precentral cortex. Time: 2 and 10 msec. This indicates that the responses shown in Fig. 2 do not traverse the sensory cortex or the cerebellum on the way to the "motor" cortex.