Figure 9.

Effect of cooling motor cortex on PPCr stimulation-evoked movements in case 13–39. At top, the face is shown before and just after ICMS during the baseline epoch. Downward ear movement and unilateral eye blink evoked by stimulating a site in PPCr (orange circle in cortical map at bottom) were videotaped before, during, and after cooling deactivation of the forelimb lift representation in M1/3a (second row of tracings). Plots show speed of the helix of the pinna (traced with thick lines), the most easily tracked feature of the ear from this video angle. This figure demonstrates heterotopic interactions between M1 and PPCr in which an unrelated movement evoked in PPCr is abolished. When cortex was returned to normal temperature, the ear movement returned, although the blink did not. Conventions are as in previous figures.