Percentage of total map area devoted to the representation of proximal joints (shoulder and elbow), distal joints (wrist and digits), or proximal–distal multijoint. Data from the M1 that received unilateral inactivation (between weeks 5 and 7 only), M1 that received the initial inactivation between weeks 5 and 7, but examined after inactivation of the other M1 from weeks 7 to 11 (alternate inactivation) and the untreated M1, are shown.