Abstract
Grasping is a complex motor task which requires a fine control of the multiple degrees of freedom of the hand, in both the position and the force domain. In this chapter, we investigated the coordinated control of digit position and force in the human hand while grasping and holding a moving object. We observed a substantial variability between participants in the hand posture. Instead, digit placement was rather stereotyped for repeated grasps of the same participant. The normal forces applied by the digits co-varied with their placement across trials. Specifically, we observed an exponential relationship between finger placement and normal force applied for the thumb and lateral fingers. For the middle and ring fingers, the force responses co-varied in an approximately linear fashion with digit position. Principal component analysis revealed that more than 97 % of the finger force variance was accounted by the first two components (corresponding to the first and the second force synergy). This is consisted with the framework of motor synergy, since two components successfully explained most of the variability in the data.
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References
Baayen R, Davidson D, Bates D (2008) Mixed-effects modeling with crossed random effects for subjects and items. J Memory Lang 59(4):390–412. doi:10.1016/j.jml.2007.12.005. http://linkinghub.elsevier.com/retrieve/pii/S0749596X07001398
Baud-Bovy G, Soechting J (2002) Factors influencing variability in load forces in a tripod grasp. Exp Brain Res 143(1):57–66. doi:10.1007/s00221-001-0966-8
Baud-Bovy G, Soechting JF (2001) Two virtual fingers in the control of the tripod grasp. J Neurophysiol 86:604–615
Bernstein N (1967) The co-ordination and regulation of movements. Pergamon Press, Oxford
Bicchi A, Gabiccini M, Santello M (2011) Modelling natural and artificial hands with synergies. Philos Trans Royal Soc Lond Ser B Biol Sci 366(1581):3153–3161. doi:10.1098/rstb.2011.0152
D’Avella M, Portone A, Fernandez L, Lacquaniti F (2006) Control of fast-reaching movements by muscle synergy combinations. J Neurosci 26(30):7791–7810
Friedman J, Flash T (2007) Task-dependent selection of grasp kinematics and stiffness in human object manipulation. Cortex 43(3):444–460
Fu Q, Zhang W, Santello M (2010) Anticipatory planning and control of grasp positions and forces for dexterous two-digit manipulation. J Neurosci 30(27):9117–9126. doi:10.1523/JNEUROSCI.4159-09.2010
Johansson RS, Westling G (1984) Roles of glabrous skin receptors and sensorimotor memory in automatic control of precision grip when lifting rougher or more slippery objects. Exp Brain Res 56(3):550–564. doi:10.1007/BF00237997
Latash ML (2012) Movements that are Both Variable and Optimal by 34(September):5–13. doi:10.2478/v10078-012-0058-9
Lukos J, Ansuini C, Santello M (2007) Choice of contact points during multidigit grasping: effect of predictability of object center of mass location. J Neurosci 27(14):3894–3903. doi:10.1523/JNEUROSCI.4693-06.2007
Lukos JR, Ansuini C, Santello M (2008) Anticipatory control of grasping: independence of sensorimotor memories for kinematics and kinetics. J Neurosci: Off J Soc Neurosci 28(48):12765–12774. doi:10.1523/JNEUROSCI.4335-08.2008
Naceri A, Moscatelli A, Santello M, Ernst M (2014a) Multi-digit position and force coordination in three- and four-digit grasping. In: Haptics: neuroscience, devices, modeling, and applications. doi:10.1007/978-3-662-44193-0_14. http://faculty.engineering.asu.edu/santello/wp-content/uploads/2014/05/eurohaptics2014_submission_110-.pdf
Naceri A, Moscatelli A, Santello M, Ernst MO (2014b) Coordination of multi-digit positions and forces during unconstrained grasping in response to object perturbations. In: 2014 IEEE haptics symposium (HAPTICS), IEEE, pp 35–40. doi:10.1109/HAPTICS.2014.6775430. http://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=6775430
Park J, Zatsiorsky VM, Latash ML (2010) Optimality vs. variability: an example of multi-finger redundant tasks. Exp Brain Res 207(1–2):119–132. doi:10.1007/s00221-010-2440-y
Salimi I, Hollender I, Frazier W, Gordon AM (2000) Specificity of internal representations underlying grasping. J Neurophysiol 84:2390–2397
Santello M, Soechting JF (2000) Force synergies for multifingered grasping. Exp Brain Res 133(4):457–467
Santello M, Flanders M, Soechting JF (1998) Postural hand synergies for tool use. J Neurosci 18(23):10105–10115
Santello M, Baud-Bovy G, Jörntell H (2013) Neural bases of hand synergies. Front Comput Neurosci 7(April):23. doi:10.3389/fncom.2013.00023
Schurmann C, Koiva R, Haschke R, Ritter H (2011) A modular high-speed tactile sensor for human manipulation research. In: World haptics conference (WHC), 2011 IEEE, pp 339–344. doi:10.1109/WHC.2011.5945509
Terekhov AV (2010) NIH Public. Access 61: doi:10.1007/s00285-009-0306-3.An
Todorov E, Ghahramani Z (2004) Analysis of the synergies underlying complex hand manipulation. In: Conference proceedings: annual international conference of the IEEE engineering in medicine and biology society IEEE engineering in medicine and biology society conference, vol 6, pp 4637–4640. doi:10.1109/IEMBS.2004.1404285. http://www.ncbi.nlm.nih.gov/pubmed/17271341
Wu YH, Zatsiorsky VM, Latash ML (2012) Multi-digit coordination during lifting a horizontally oriented object: synergies control with referent configurations. Exp Brain Res 222(3):277–290. doi:10.1007/s00221-012-3215-4. http://www.ncbi.nlm.nih.gov/pubmed/22910900
Zatsiorsky VM, Latash ML (2008) Multi-finger prehension: an overview. J Motor Behav 40:446–476
Zatsiorsky VM, Gregory RW, Latash ML (2002) Force and torque production in static multifinger prehension: biomechanics and control. I. Biomechanics. Biol Cybern 87(1):1–19. doi:10.1007/s00422-002-0321-6.Force
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Naceri, A., Santello, M., Moscatelli, A., Ernst, M.O. (2016). Digit Position and Force Synergies During Unconstrained Grasping. In: Bianchi, M., Moscatelli, A. (eds) Human and Robot Hands. Springer Series on Touch and Haptic Systems. Springer, Cham. https://doi.org/10.1007/978-3-319-26706-7_3
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DOI: https://doi.org/10.1007/978-3-319-26706-7_3
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