Anticipatory Control of Grasping: Independence of Sensorimotor Memories for Kinematics and Kinetics

摘要: We have recently provided evidence for anticipatory grasp control mechanisms in the kinematic domain by showing that subjects modulate digit placement on an object based its center of mass (CM) when it can be anticipated (Lukos et al., 2007). This behavior relied sensorimotor memories about contact points and forces required optimal manipulation. found accurate depended acquisition implicit knowledge properties associated with repeated manipulations same object. Whereas is essential control, extent to which use explicit accurately scale manner controversial. Additionally, not known whether are able points. addressed this question asking lift while providing CM location as visual or verbal cues. Contact point modulation roll, a measure force were assessed using blocked random presentations. enabled In contrast, could minimize roll condition cue. These findings dissociation effect kinematics versus kinetics, thus suggesting independent processes grasping.