Preliminary findings of finger independency and visual force control in children with DCD
To examine finger force independency, maximum voluntary force (MVF), force enslaving (FE) and force sharing (FS) values were computed. To analyze the ability of children with DCD to visually control their finger forces, the following performance measures were calculated: rate of force change, initial overshoot, coefficient of variation (CV), root mean square error (RMSe), and inter-trial variability. The results from the MVF task showed that children with DCD as compared with TD children (a) produced similar levels of maximum finger force; (b) demonstrated less finger independency;(c) had similar finger-force sharing patterns. In addition, from the VFC task we found (d) larger performance errors in children with DCD;(e) and lower inter-trial consistency as compared to their TD peers.Our preliminary findings suggest that the impairments in manipulative skills often observed in children with DCD during everyday activities may be related to deficits in finger independency.Additionally we found that children with DCD do not have difficulties in reducing the number of joint/muscle-level degrees of freedom in order to achieve a common motor task.
Bernstein NA. The co-ordination and regulation of movements. Oxford: Pergamon Pres. 1967.
Turvey MT. Coordination. Am Psychol 1990; 45: 938.
Latash ML, Shim JK, Zatsiorsky VM. Is there a timing synergy during multi-finger production of quick force pulses? Psychopharmacology (Berl) 2004; 177: 217-23.
Schieber MH, Poliakov AV. Partial inactivation of the primary motor cortex hand area: effects on individuated finger movements. J Neurosci 1998; 18: 9038-54.
Schieber MH, Santello M. Hand function: peripheral and central constraints on performance. J Appl Physiol 2004; 96: 2293-300.
Shim JK, Latash ML, Zatsiorsky VM. Prehension synergies in three dimensions. J Neurophysiol 2005; 93: 766-76.
Zatsiorsky V, Gao F, Latash M. Prehension synergies: effects of object geometry and prescribed torques. Exp Brain Res 2003; 148: 77-87.
Geuze RH. Motor impairment in DCD and activities of daily living. In: Sugden DA, Chambers M, editors. Children with Developmental Coordination Disorder. London: Whurr Publishers; 2005.
Polatajko HJ, Macnab JJ, Anstett B, Malloyâ€Miller T, Murphy K, Noh S. A clinical trial of the process-oriented treatment approach for children with developmental co-ordination disorder. Dev Med Child Neurology 1995; 37: 310-9.
Lundy-Ekman L, Ivry R, Keele S, Woollacott M. Timing and force control deficits in clumsy children. J Cog Neurosci 1991; 3: 367-76.
Piek JP, Skinner RA. Timing and force control during a sequential tapping task in children with and without motor coordination problems. J Int Neuropsychol Soc 1999; 5: 320-9.
Pitcher TM, Piek JP, Barrett NC. Timing and force control in boys with attention deficit hyperactivity disorder: subtype differences and the effect of comorbid developmental coordination disorder. Hum Mov Sci 2002; 21: 919-45.
Hill EL, Wing AM. Developmental disorders and the use of grip force to compensate for inertial forces during voluntary movement. In: Connolly KJ, editor. The Psychobiology of the Hand. London: Mac Keith Press; 1998. p. 199-212.
Hill EL, Wing AM. Coordination of grip force and load force in developmental coordination disorder: A case study. Neurocase 1999; 5: 537-44.
Pereira HS, Landgren M, Gillberg C, Forssberg H. Parametric control of fingertip forces during precision grip lifts in children with DCD (developmental coordination disorder) and DAMP (deficits in attention motor control and perception). Neuropsychologia 2001; 39: 478-88.
Oliveira MA, Shim JK, Loss JF, Petersen RDS, Clark JE. Effect of kinetic redundancy on hand digit control in children with DCD. Neurosci Lett 2006; 410: 42-6.
HÃ¤ger-Ross C, Schieber MH. Quantifying the independence of human finger movements: comparisons of digits, hands, and movement frequencies. J Neurosci 2000; 20: 8542-50.
Li Z-M, Latash ML, Zatsiorsky VM. Force sharing among fingers as a model of the redundancy problem. Exp Brain Res 1998; 119: 276-86.
Schieber MH, Hibbard LS. How somatotopic is the motor cortex hand area? Science 1993; 261: 489-92.
Shim JK, Oliveira MA, Hsu J, Huang J, Park J, Clark JE. Hand digit control in children: age-related changes in hand digit force interactions during maximum flexion and extension force production tasks. Exp Brain Res 2006; 176: 374-86.
Shinohara M, Li S, Kang N, Zatsiorsky VM, Latash ML. Effects of age and gender on finger coordination in MVC and submaximal force-matching tasks. J Appl Physiol 2003; 94: 259-70.
Shinohara M, Latash ML, Zatsiorsky VM. Age effects on force produced by intrinsic and extrinsic hand muscles and finger interaction during MVC tasks. J Appl Physiol 2003; 95: 1361-9.
Smits-Engelsman BCM, Westenberg Y, Duysens J. Development of isometric force and force control in children. Cogn Brain Res 2003; 17: 68-74.
Ameratunga D, Johnston L, Burns Y. Goalâ€directed upper limb movements by children with and without DCD: a window into perceptuoâ€“motor dysfunction? Physiother Res Int 2004; 9: 1-12.
Van Waelvelde H, De Weerdt W, De Cock P, Janssens L, Feys H, Engelsman BCMS. Parameterization of movement execution in children with developmental coordination disorder. Brain Cogn 2006; 60: 20-31.
Shim JK, Latash ML, Zatsiorsky VM. Prehension synergies: trial-to-trial variability and principle of superposition during static prehension in three dimensions. J Neurophysiol 2005; 93: 3649-58.
Winter DA. Biomechanics and motor control of human movement. Wiley: New York. 2009.
Zatsiorsky VM, Li Z-M, Latash ML. Enslaving effects in multi-finger force production. Exp Brain Res 2000; 131: 187-95.
Potter NL, Kent RD, Lindstrom MJ, Lazarus J-AC. Power and precision grip force control in three-to-five-year-old children: velocity control precedes amplitude control in development. Exp Brain Res 2006; 172: 246-60.
Leijnse J, Walbeehm ET, Sonneveld GJ, Hovius SER, Kauer JMG. Connections between the tendons of the musculus flexor digitorum profundus involving the synovial sheaths in the carpal tunnel. Acta Anat (Basel) 1997; 160: 112-22.
von Schroeder HP, Botte MJ, Gellman H. Anatomy of the juncturae tendinum of the hand. J Hand Surg [Am] 1990; 15: 595-602.
von Schroeder HP, Botte MJ. Anatomy and functional significance of the long extensors to the fingers and thumb. Clin Orthop Relat Res 2001; 383: 74-83.
Hay L, Redon C. The control of goal-directed movements in children: Role of proprioceptive muscle afferents. Hum Mov Sci 1997; 16: 433-51.
Blank R, Heizer W, Von VoÃŸ H. Externally guided control of static grip forces by visual feedbackâ€“age and task effects in 3â€“6-year old children and in adults. Neurosci Lett 1999; 271: 41-4.
Blank R, Heizer W, Von Voss H. Development of externally guided grip force modulation in man. Neurosci Lett 2000; 286: 187-90.
Deutsch KM, Newell KM. Age differences in noise and variability of isometric force production. J Exp Child Psychol 2001; 80: 392-408.
Deutsch KM, Newell KM. Children's coordination of force output in a pinch grip task. Dev Psychobiol 2002; 41: 253-64.
Deutsch KM, Newell KM. Deterministic and stochastic processes in children's isometric force variability. Dev Psychobiol 2003; 43: 335-45.
Lazarus J-AC, Whitall J, Franks CA. Isometric force regulation in children. J Exp Child Psych 1995; 60: 245-60.
Smits-Engelsman BCM, Sugden D, Duysens J. Developmental trends in speed accuracy trade-off in 6â€“10-year-old children performing rapid reciprocal and discrete aiming movements. Hum Mov Sci 2006; 25: 37-49.
Santello M, Soechting JF. Force synergies for multifingered grasping. Exp Brain Res 2000; 133: 457-67.
Shim JK, Latash ML, Zatsiorsky VM. The human central nervous system needs time to organize task-specific covariation of finger forces. Neurosci Lett 2003; 353: 72-4.
Shim JK, Latash ML, Zatsiorsky VM. Prehension synergies: trial-to-trial variability and hierarchical organization of stable performance. Exp Brain Res 2003; 152: 173-84.
Shim JK, Lay BS, Zatsiorsky VM, Latash ML. Age-related changes in finger coordination in static prehension tasks. J Appl Physiol 2004; 97: 213-24.
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