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2012 | 34 | 1 | 5-13
Article title

Movements that are both variable and optimal

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EN
Abstracts
EN
This brief review addresses two major aspects of the neural control of multi-element systems. First, theprinciple of abundance suggests that the central nervous system unites elements into synergies (co-variation ofelemental variables across trials quantified within the framework of the uncontrolled manifold hypothesis) that stabilizeimportant performance variables. Second, a novel method, analytical inverse optimization, has been introduced tocompute cost functions that define averaged across trials involvement of individual elements over a range of values oftask-specific performance variables. The two aspects reflect two features of motor coordination: (1) using variablesolutions that allow performing secondary tasks and stabilizing performance variables; and (2) selecting combinationsof elemental variables that follow an optimization principle. We suggest that the conflict between the two approaches (asingle solution vs. families of solutions) is apparent, not real. Natural motor variability may be due to using the samecost function across slightly different initial states; on the other hand, there may be variability in the cost function itselfleading to variable solutions that are all optimal with respect to slightly different cost functions. The analysis of motorsynergies has revealed specific changes associated with atypical development, healthy aging, neurological disorders, andpractice. These have allowed formulating hypotheses on the neurophysiological mechanisms involved in the synergiccontrol of actions.
Publisher

Year
Volume
34
Issue
1
Pages
5-13
Physical description
Dates
published
1 - 10 - 2012
online
23 - 10 - 2012
Contributors
References
  • Bernstein NA. The Co-ordination and Regulation of Movements. Pergamon Press, Oxford; 1967
  • Bernstein NA. On dexterity and its development. In: In: Latash ML, Turvey MT (Eds.) Dexterity and Its Development, pp. 1-244, Erlbaum Publ.: Mahwah, NJ; 1996
  • Domkin D, Laczko J, Jaric S, Johansson H, Latash ML. Structure of joint variability in bimanual pointing tasks. Exp Brain Res, 2002; 143: 11-23
  • Freitas SM, Scholz JP. Does hand dominance affect the use of motor abundance when reaching to uncertain targets? Hum Move Sci, 2009; 28: 169-190[WoS]
  • Gelfand IM, Latash ML. On the problem of adequate language in movement science. Motor Control, 1998; 2: 306-313
  • Harris CM, Wolpert DM. Signal-dependent noise determines motor planning. Nature, 1998; 394: 780-784
  • Kang N, Shinohara M, Zatsiorsky VM, Latash ML. Learning multi-finger synergies: An uncontrolled manifold analysis. Exp Brain Res, 2004; 157: 336-350
  • Kapur S, Zatsiorsky VM, Latash ML. Age-related changes in the control of finger force vectors. J Appl Physiol, 2010; 109: 1827-1841
  • Klous M, Mikulic P, Latash ML. Two aspects of feed-forward postural control: Anticipatory postural adjustments and anticipatory synergy adjustments. J Neurophysiol, 2011; 105: 2275-2288[WoS]
  • Latash ML. Synergy. Oxford University Press, New York; 2008
  • Latash ML. Motor synergies and the equilibrium-point hypothesis. Motor Control, 2010; 14: 294-322
  • Latash ML. The bliss (not the problem) of motor abundance (not redundancy). Exp Brain Res, 2012; 217: 1-5[WoS]
  • Latash ML, Anson JG. What are normal movements in atypical populations? Behav Brain Sci, 1996; 19: 55-106
  • Latash ML, Kang N, Patterson D. Finger coordination in persons with Down syndrome: Atypical patterns of coordination and the effects of practice. Exp Brain Res, 2002a; 146: 345-355
  • Latash ML, Scholz JP, Schöner G. Motor control strategies revealed in the structure of motor variability. Exer Sport Sci Rev, 2002b; 30: 26-31[Crossref]
  • Latash ML, Scholz JP, Schöner G. Toward a new theory of motor synergies. Motor Control, 2007; 11: 276-308
  • Latash ML, Yarrow K, Rothwell JC. Changes in finger coordination and responses to single pulse TMS of motor cortex during practice of a multi-finger force production task. Exp Brain Res, 2003; 151: 60-71
  • Mattos D, Latash ML, Park E, Kuhl J, Scholz JP. Unpredictable elbow joint perturbation during reaching results in multijoint motor equivalence. J Neurophysiol, 2011; 106: 1424-1436[WoS]
  • Newell KM. Motor skill acquisition. Ann Rev Psychol, 1991; 42: 213-237
  • Newell KM, Corcos DM (editors) Variability in Motor Control. Human Kinetics: Urbana, IL; 1993
  • Niu X, Latash ML, Zatsiorsky VM. Reproducibility and variability of the cost functions reconstructed from experimental recordings in multi-finger prehension. J Mot Behav, 2012; 44: 69-85[WoS]
  • Olafsdottir H, Yoshida N, Zatsiorsky VM, Latash ML. Anticipatory covariation of finger forces during selfpaced and reaction time force production. Neurosci Lett, 2005; 381: 92-96
  • Park J, Zatsiorsky VM, Latash ML. Optimality vs. variability: An example of multi-finger redundant tasks. Exp Brain Res, 2010; 207: 119-132[WoS]
  • Park J, Wu Y-H, Lewis MM, Huang X, Latash ML. Changes in multi-finger interaction and coordination in Parkinson’s disease. J Neurophysiol (e-pub, PMID: 22552184); 2012[WoS]
  • Reisman D, Scholz JP. Aspects of joint coordination are preserved during pointing in persons with post-stroke hemiparesis. Brain, 2003; 126: 2510-27
  • Scholz JP, Schöner G. The uncontrolled manifold concept: Identifying control variables for a functional task. Exp Brain Res, 1999; 126, 289-306
  • Scholz JP, Schöner G, Latash ML. Identifying the control structure of multijoint coordination during pistol shooting. Exp Brain Res, 2000; 135: 382-404
  • Shim JK, Kim SW, Oh SJ, Kang N, Zatsiorsky VM, Latash ML. Plastic changes in interhemispheric inhibition with practice of a two-hand force production task: A transcranial magnetic stimulation study. Neurosci Lett, 2005a; 374: 104-108.
  • Shim JK, Olafsdottir H, Zatsiorsky VM, Latash ML. The emergence and disappearance of multi-digit synergies during force production tasks. Exp Brain Res, 2005b, 164: 260-270
  • Shim JK, Park J, Zatsiorsky VM, Latash ML. Adjustments of prehension synergies in response to self-triggered and experimenter-triggered load and torque perturbations. Exp Brain Res, 2006; 175: 641-653
  • Shinohara M, Scholz JP, Zatsiorsky VM, Latash ML. Finger interaction during accurate multi-finger force production tasks in young and elderly persons. Exp Brain Res, 2004; 156: 282-292
  • Terekhov AV, Pesin YB, Niu X, Latash ML, Zatsiorsky VM. An analytical approach to the problem of inverse optimization: An application to human prehension. J Math Biol, 2010; 61: 423-453[WoS]
  • Terekhov AV, Zatsiorsky VM. Analytical and numerical analysis of inverse optimization problems. Biol Cybern, 2011; 104: 75-93[WoS]
  • Zhang W, Scholz JP, Zatsiorsky VM, Latash ML. What do synergies do? Effects of secondary constraints on multi-digit synergies in accurate force-production tasks. J Neurophysiol, 2008; 99: 500-513[WoS]
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.-psjd-doi-10_2478_v10078-012-0058-9
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