Fig. 9
From: Sex differences in recovery of motor function in a rhesus monkey model of cortical injury
Representative images of post-operative grasp patterns. A Image shows recovered finger-thumb grasp of a monkey with isolated digit action and no evidence of “mass action” of the digits or compensatory scooping. Arrow in A shows precise finger-thumb grasp. B Image shows compensatory “scooping” involving all fingers of a monkey. The fingers work together to retrieve the food reward, a grasp that is referred to as “mass action” of digits. Arrow in B shows fingers scooping candy into the palm of the hand