TY - JOUR
T1 - Ultra-fast selection of grasping points
AU - Voudouris, D.
AU - Smeets, J.B.J.
AU - Brenner, E.
PY - 2013
Y1 - 2013
N2 - To grasp an object one needs to determine suitable positions on its surface for placing the digits and to move the digits to those positions. If the object is displaced during a reach-to-grasp movement, the digit movements are quickly adjusted. Do these fast adjustments only guide the digits to previously chosen positions on the surface of the object, or is the choice of contact points also constantly reconsidered? Subjects grasped a ball or a cube that sometimes rotated briefly when the digits started moving. The digits followed the rotation within 115 ms. When the object was a ball, subjects quickly counteracted the initial following response by reconsidering their choice of grasping points so that the digits ended at different positions on the rotated surface of the ball, and the ball was grasped with the preferred orientation of the hand. When the object was a cube, subjects sometimes counteracted the initial following response to grasp the cube by a different pair of sides. This altered choice of grasping points was evident within ~160 ms of rotation onset, which is shorter than regular reaction times. © 2013 the American Physiological Society.
AB - To grasp an object one needs to determine suitable positions on its surface for placing the digits and to move the digits to those positions. If the object is displaced during a reach-to-grasp movement, the digit movements are quickly adjusted. Do these fast adjustments only guide the digits to previously chosen positions on the surface of the object, or is the choice of contact points also constantly reconsidered? Subjects grasped a ball or a cube that sometimes rotated briefly when the digits started moving. The digits followed the rotation within 115 ms. When the object was a ball, subjects quickly counteracted the initial following response by reconsidering their choice of grasping points so that the digits ended at different positions on the rotated surface of the ball, and the ball was grasped with the preferred orientation of the hand. When the object was a cube, subjects sometimes counteracted the initial following response to grasp the cube by a different pair of sides. This altered choice of grasping points was evident within ~160 ms of rotation onset, which is shorter than regular reaction times. © 2013 the American Physiological Society.
U2 - 10.1152/jn.00066.2013
DO - 10.1152/jn.00066.2013
M3 - Article
SN - 0022-3077
VL - 110
SP - 1484
EP - 1489
JO - Journal of neurophysiology
JF - Journal of neurophysiology
ER -