Experimental Brain Research

, Volume 226, Issue 2, pp 273–283 | Cite as

Improving finger coordination in young and elderly persons

  • Yen-Hsun Wu
  • Nemanja Pazin
  • Vladimir M. Zatsiorsky
  • Mark L. Latash
Research Article


We studied the effects of a single practice session of a variable task with subject-specific adjustments of task difficulty (instability) on indices of multi-finger coordination in young and elderly persons. The main hypothesis was that practicing such a task would lead to contrasting changes in the amounts of two components of variance estimated across repetitive trials within the uncontrolled manifold (UCM) hypothesis: V UCM that had no effect on total force and V ORT that affected total force. In addition, we also expected to see strong transfer effects to a different task. A variable task with graded instability was designed to encourage use of variable solutions during the accurate production of total force with two fingers. The subjects practiced with the index and middle fingers pressing on individual force sensors. Overall, the older subjects showed lower indices of performance and higher indices of both V UCM and V ORT. After about 1 h of practice, both groups showed an increase in the index of involuntary force production by non-task fingers (enslaving). Both groups improved the indices of performance. The two variance indices showed opposite effects of practice: V ORT dropped with practice, while V UCM increased leading to an increase in the total amount of variance in the space of commands to fingers and in the index of force-stabilizing synergy. Performance in a simpler, non-practiced task improved, but there was no transfer of the changes in the structure of variance. Specifically, both variance components, V ORT and V UCM, dropped in the non-practiced task. The results show that the neural system responsible for synergies stabilizing important features of performance is highly adaptable to practice of tasks designed to encourage use of variable solutions. We view the results as highly promising for future use in populations with impaired coordination characterized by low synergy indices.


Practice Coordination Finger Variance Force Aging Uncontrolled manifold 



The study was in part supported by NIH grants AG-018751, NS-035032, and AR-048563.


  1. Bernstein NA (1967) The co-ordination and regulation of movements. Pergamon, OxfordGoogle Scholar
  2. Boatright JR, Kiebzak GM, O’Neil DM, Peindl RD (1997) Measurement of thumb abduction strength: normative data and a comparison with grip and pinch strength. J Hand Surg (Amer) 22:843–848CrossRefGoogle Scholar
  3. Bruin J (2006) How can I understand a three-way interaction in ANOVA? newtest: command to compute new test. UCLA: Academic Technology Services, Statistical Consulting Group.
  4. Butch ER, Young S, Contreras-Vidal JL (2003) Visuomotor adaptation in normal aging. Learn Mem 10:55–63CrossRefGoogle Scholar
  5. Clark BC, Taylor JL (2011) Age-related changes in motor cortical properties and voluntary activation of skeletal muscle. Curr Aging Sci 4:192–199PubMedCrossRefGoogle Scholar
  6. Connelly DM, Carnahan H, Vandervoort AA (2000) Motor skill learning of concentric and eccentric isokinetic movements in older adults. Exp Aging Res 26:209–228PubMedCrossRefGoogle Scholar
  7. Danion F, Schöner G, Latash ML, Li S, Scholz JP, Zatsiorsky VM (2003) A force mode hypothesis for finger interaction during multi-finger force production tasks. Biol Cybern 88:91–98PubMedCrossRefGoogle Scholar
  8. de Freitas SM, Scholz JP, Stehman AJ (2007) Effect of motor planning on use of motor abundance. Neurosci Lett 417:66–71PubMedCrossRefGoogle Scholar
  9. Domkin D, Laczko J, Jaric S, Johansson H, Latash ML (2002) Structure of joint variability in bimanual pointing tasks. Exp Brain Res 143:11–23PubMedCrossRefGoogle Scholar
  10. Etnier JL, Landers DM (1998) Motor performance and motor learning as a function of age and fitness. Res Q Exerc Sport 69:136–146PubMedCrossRefGoogle Scholar
  11. Fathi D, Ueki Y, Mima T, Koganemaru S, Nagamine T, Tawfik A, Fukuyama H (2010) Effects of aging on the human motor cortical plasticity studied by paired associative stimulation. Clin Neurophysiol 121:90–93PubMedCrossRefGoogle Scholar
  12. Fernandez-Ruiz J, Hall C, Vergara P, Diaz R (2000) Prism adaptation in normal aging: slower adaptation rate and larger aftereffect. Cogn Brain Res 9:223–226CrossRefGoogle Scholar
  13. Francis KL, Spirduso WW (2000) Age differences in the expression of manual asymmetry. Exp Aging Res 26:169–180PubMedCrossRefGoogle Scholar
  14. Gelfand IM, Latash ML (1998) On the problem of adequate language in movement science. Mot Control 2:306–313Google Scholar
  15. Gera G, Freitas SMSF, Latash ML, Monahan K, Schöner G, Scholz JP (2010) Motor abundance contributes to resolving multiple kinematic task constraints. Mot Control 14:83–115Google Scholar
  16. Giampaoli S, Ferrucci L, Cecchi F, Lo Noce C, Poce A, Santaquilani A, Vescio MF, Menotti A (1999) Hand-grip strength predicts incident disability in non-disabled older men. Age Aging 28:283–288CrossRefGoogle Scholar
  17. Hackel ME, Wolfe GA, Bang SM, Canfield JS (1992) Changes in hand function in the aging adult as determined by the Jebsen Test of Hand Function. Phys Ther 72:373–377PubMedGoogle Scholar
  18. Harrington DL, Haaland KY (1992) Skill learning in the elderly: diminished implicit and explicit memory for a motor sequence. Psych Aging 7:425–434CrossRefGoogle Scholar
  19. Hughes S, Gibbs J, Dunlop D, Edelman P, Singer R, Chang RW (1997) Predictors of decline in manual performance in older adults. J Am Geriatr Soc 45:905–910PubMedGoogle Scholar
  20. Kapur S, Zatsiorsky VM, Latash ML (2010) Age-related changes in the control of finger force vectors. J Appl Physiol 109:1827–1841PubMedCrossRefGoogle Scholar
  21. Klous M, Danna-dos-Santos A, Latash ML (2010) Multi-muscle synergies in a dual postural task: evidence for the principle of superposition. Exp Brain Res 202:457–471PubMedCrossRefGoogle Scholar
  22. Kubicki A, Petrement G, Bonnetblanc F, Ballay Y, Mourey F (2012) Practice-related improvements in postural control during rapid arm movement in older adults: a preliminary study. J Gerontol A Biol Sci Med Sci 67:196–203PubMedCrossRefGoogle Scholar
  23. Latash ML (2012) The bliss (not the problem) of motor abundance (not redundancy). Exp Brain Res 217:1–5PubMedCrossRefGoogle Scholar
  24. Latash ML, Scholz JF, Danion F, Schöner G (2001) Structure of motor variability in marginally redundant multi-finger force production tasks. Exp Brain Res 141:153–165PubMedCrossRefGoogle Scholar
  25. Latash ML, Scholz JP, Schöner G (2007) Toward a new theory of motor synergies. Mot Control 11:276–308Google Scholar
  26. Mattos D, Latash ML, Park E, Kuhl J, Scholz JP (2011) Unpredictable elbow joint perturbation during reaching results in multijoint motor equivalence. J Neurophysiol 106:1424–1436PubMedCrossRefGoogle Scholar
  27. McNay EC, Willingham DB (1998) Deficit in learning of a motor skill requiring strategy, but not of perceptuomotor recalibration, with aging. Learn Mem 4:411–420PubMedCrossRefGoogle Scholar
  28. Moreno-Baylach MJ, Felipo V, Männistö PT, García-Horsman JA (2008) Expression and traffic of cellular prolyl oligopeptidase are regulated during cerebellar granule cell differentiation, maturation, and aging. Neuroscience 156:580–585PubMedCrossRefGoogle Scholar
  29. Olafsdottir H, Zhang W, Zatsiorsky VM, Latash ML (2007) Age-related changes in multi-finger synergies in accurate moment of force production tasks. J Appl Physiol 102:1490–1501PubMedCrossRefGoogle Scholar
  30. Osborne J (2010) Improving your data transformations: applying the Box-Cox transformation. Practical Assessment, Research and. Evaluation 15:12Google Scholar
  31. Park J, Wu Y-H, Lewis MM, Huang X, Latash ML (2012) Changes in multi-finger interaction and coordination in Parkinson’s disease. J Neurophysiol 108:915–924PubMedCrossRefGoogle Scholar
  32. Pratt J, Chasteen AL, Abrams RA (1994) Rapid aimed limb movements: age differences and practice effects in component submovements. Psychol Aging 9:325–334PubMedCrossRefGoogle Scholar
  33. Rantanen T, Guralnik JM, Foley D, Masaki K, Leveille S, Curb JD, White L (1999) Midlife hand grip strength as a predictor of old age disability. JAMA 281:558–560PubMedCrossRefGoogle Scholar
  34. Rogasch NC, Dartnall TJ, Cirillo J, Nordstrom MA, Semmler JG (2009) Corticomotor plasticity and learning of a ballistic thumb training task are diminished in older adults. J Appl Physiol 107:1874–1883PubMedCrossRefGoogle Scholar
  35. Schieber MH, Santello M (2004) Hand function: peripheral and central constraints on performance. J Appl Physiol 96:2293–2300PubMedCrossRefGoogle Scholar
  36. Scholz JP, Schöner G (1999) The uncontrolled manifold concept: identifying control variables for a functional task. Exp Brain Res 126:289–306PubMedCrossRefGoogle Scholar
  37. Scholz JP, Schöner G, Latash ML (2000) Identifying the control structure of multijoint coordination during pistol shooting. Exp Brain Res 135:382–404PubMedCrossRefGoogle Scholar
  38. Seidler RD (2004) Multiple motor learning experiences enhance motor adaptability. J Cogn Neurol 16:65–73CrossRefGoogle Scholar
  39. Seidler RD (2006) Differential effects of age on sequence learning and sensorimotor adaptation. Brain Res Bull 70:337–346PubMedCrossRefGoogle Scholar
  40. Seidler RD (2007) Older adults can learn to learn new motor skills. Behav Brain Res 183:118–122PubMedCrossRefGoogle Scholar
  41. Seidler RD (2010) Neural correlates of motor learning, transfer of learning, and learning to learn. Exerc Sport Sci Rev 38:3–9PubMedCrossRefGoogle Scholar
  42. Seidler-Dobrin RD, Stelmach GE (1998) Persistence in visual feedback control by the elderly. Exp Brain Res 119:467–474PubMedCrossRefGoogle Scholar
  43. Sherwood DE (1996) The benefits of random variable practice for spatial accuracy and error detection in a rapid aiming task. Res Q Exerc Sport 67:35–43PubMedCrossRefGoogle Scholar
  44. Shinohara M, Li S, Kang N, Zatsiorsky VM, Latash ML (2003) Effects of age and gender on finger coordination in MVC and sub-maximal force-matching tasks. J Appl Physiol 94:259–270PubMedGoogle Scholar
  45. Shinohara M, Scholz JP, Zatsiorsky VM, Latash ML (2004) Finger interaction during accurate multi-finger force production tasks in young and elderly persons. Exp Brain Res 156:282–292PubMedCrossRefGoogle Scholar
  46. Sparrow WA, Parker S, Lay B, Wengier M (2005) Aging effects on the metabolic and cognitive energy cost of interlimb coordination. J Gerontol A Biol Sci Med Sci 60:312–319PubMedCrossRefGoogle Scholar
  47. van Hedel HJ, Dietz V (2004) The influence of age on learning a locomotor task. Clin Neurophysiol 115:2134–2143PubMedCrossRefGoogle Scholar
  48. Van Ooteghem K, Frank JS, Allard F, Horak FB (2010) Aging does not affect generalized postural motor learning in response to variable amplitude oscillations of the support surface. Exp Brain Res 204:505–514PubMedCrossRefGoogle Scholar
  49. Voelcker-Rehage C, Alberts JL (2005) Age-related changes in grasping force modulation. Exp Brain Res 166:61–70PubMedCrossRefGoogle Scholar
  50. Welsh TN, Elliott D (2000) Preparation and control of goal-directed limb movements in persons with Down Syndrome. In: Weeks DJ, Chua R, Elliott D (eds) Perceptual-motor behavior in down syndrome. Human Kinetics, Champaign, pp 49–70Google Scholar
  51. Wobbrock JO, Findlater L, Gergle D, Higgins JJ (2011) The aligned rank transform for nonparametric factorial analyses using only ANOVA procedures. In: Proceedings of the CHI 2011 conference on Human factors in computing systems, vol 1, pp 143–146Google Scholar
  52. Wu Y-H, Pazin N, Zatsiorsky VM, Latash ML (2012) Practicing elements vs. practicing coordination: changes in the structure of variance. J Mot Behav 44:471–478PubMedCrossRefGoogle Scholar
  53. Yang J-F, Scholz JP, Latash ML (2007) The role of kinematic redundancy in adaptation of reaching. Exp Brain Res 176:54–69PubMedCrossRefGoogle Scholar
  54. Zatsiorsky VM, Li ZM, Latash ML (1998) Coordinated force production in multi-finger tasks: finger interaction and neural network modeling. Biol Cybern 79:139–150PubMedCrossRefGoogle Scholar
  55. Zatsiorsky VM, Li ZM, Latash ML (2000) Enslaving effects in multi-finger force production. Exp Brain Res 131:187–195PubMedCrossRefGoogle Scholar
  56. Zhang W, Scholz JP, Zatsiorsky VM, Latash ML (2008) What do synergies do? Effects of secondary constraints on multi-digit synergies in accurate force-production tasks. J Neurophysiol 99:500–513PubMedCrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Yen-Hsun Wu
    • 1
  • Nemanja Pazin
    • 1
    • 2
  • Vladimir M. Zatsiorsky
    • 1
  • Mark L. Latash
    • 1
  1. 1.Department of Kinesiology, Rec.Hall-267The Pennsylvania State UniversityUniversity ParkUSA
  2. 2.Faculty of Sport and Physical EducationUniversity of BelgradeBelgradeSerbia

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