Function may be reassurance, appeasement, or reconciliation. 7. See video. extend hand, palm upward Plooij Extend hand, palm upward. Bipedal or quadrupedal. Used to solicit play, to beg, when mother solicits infant to ride on her belly or back, or to pant-grunt to dominant individual. Once, juvenile female, Flavia reached left arm to TN while standing bipedally. Seen in bonobos. See video. See also video pant-grunt with bent elbow. extend hand to beg Plooij Beg with hand: Stretch hand to possessors hand, mouth or food. Goodalls Beg hand-to-food, hand-to-hand and hand-to-mouth. Kanos Food beg: hand to hand and hand to mouth. Cf. mouth for begging. See video. extend hand to hold tree Reach arm forward and grasp tree trunk. Often performed to solicit grooming. Seen in bonobos. extend