Figure 2.

Skin resistance responses during motor imagery. In the good imager group, a response (indicated by the dotted line) was recorded during each motor imagery trial, hence attesting to mental work. Conversely, in the poor imagers, the lack of skin resistance responses attests the difficulty to form an accurate representation of action. The strong increase in skin resistance throughout the session also indicated that the subject becomes too relaxed and was not able to keep an adequate arousal level. MI, motor imagery.