TY - JOUR
T1 - Optimality, Stability, and Agility of Human Movement
T2 - New Optimality Criterion and Trade-Offs
AU - Latash, Mark L.
N1 - Publisher Copyright:
© 2023 Human Kinetics, Inc.
PY - 2022
Y1 - 2022
N2 - This review of movement stability, optimality, and agility is based on the theory of motor control with changes in spatial referent coordinates for the effectors, the principle of abundance, and the uncontrolled manifold hypothesis. A new optimality principle is suggested based on the concept of optimal sharing corresponding to a vector in the space of elemental variables locally orthogonal to the uncontrolled manifold. Motion along this direction is associated with minimal components along the relatively unstable directions within the uncontrolled manifold leading to a minimal motor equivalent motion. For well-practiced actions, this task-specific criterion is followed in spaces of referent coordinates. Consequences of the suggested framework include trade-offs among stability, optimality, and agility, unintentional changes in performance, hand dominance, finger specialization, individual traits in performance, and movement disorders in neurological patients.
AB - This review of movement stability, optimality, and agility is based on the theory of motor control with changes in spatial referent coordinates for the effectors, the principle of abundance, and the uncontrolled manifold hypothesis. A new optimality principle is suggested based on the concept of optimal sharing corresponding to a vector in the space of elemental variables locally orthogonal to the uncontrolled manifold. Motion along this direction is associated with minimal components along the relatively unstable directions within the uncontrolled manifold leading to a minimal motor equivalent motion. For well-practiced actions, this task-specific criterion is followed in spaces of referent coordinates. Consequences of the suggested framework include trade-offs among stability, optimality, and agility, unintentional changes in performance, hand dominance, finger specialization, individual traits in performance, and movement disorders in neurological patients.
UR - http://www.scopus.com/inward/record.url?scp=85141267619&partnerID=8YFLogxK
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U2 - 10.1123/mc.2021-0135
DO - 10.1123/mc.2021-0135
M3 - Review article
C2 - 35279021
AN - SCOPUS:85141267619
SN - 1087-1640
VL - 27
SP - 129
EP - 159
JO - Motor control
JF - Motor control
IS - 1
ER -