Abstract
We explored one of the unusual predictions of the concept of back-coupling within the theoretical scheme of the control of posture and movement with setting referent coordinates for the effectors. This concept implies slow drifts of referent coordinates toward actual coordinates leading to unintentional drift in performance. During standing, such slow drifts may lead to a protective step or even a fall and, therefore, corrections are expected leading to body sway at frequencies under 0.1 Hz. Young healthy subjects stood on the force platform quietly for 60 s under two single-task conditions, with eyes open and closed, and two double-task conditions, matching an irrelevant muscle activation signal to a target (MATCH) and performing a subtraction task. The latter was performed with eyes open and closed. The rambling-trembling decomposition was applied to the displacements of the center of pressure in the anterior–posterior direction. Spectral analysis was used to quantify power within typical ranges for Tr and Rm, as well as for a slow Rm component (under 0.1 Hz) addressed as Drift. Closing eyes led to a significant increase in Rm and Tr, but no effects on Drift. Drift increased significantly in the MATCH task with no changes in Rm and a drop in Tr. No effects of the subtraction task were seen on Drift. Overall, our findings suggest that unintentional slow drift of referent body orientation towards the actual body orientation leads to Drift, a specific example of back-coupling reflected in postural sway. This observation can be also seen as an example of physiological minimization of activity of motoneurons. Natural visual feedback is used to avoid the COP drift and/or correct it quickly and effectively; this ability is compromised when vision is used for an unrelated task.
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References
Ambike S, Zatsiorsky VM, Latash ML (2015) Processes underlying unintentional finger force changes in the absence of visual feedback. Exp Brain Res 233:711–721
Ambike S, Mattos D, Zatsiorsky VM, Latash ML (2016) Unsteady steady-states: central causes of unintentional force drift. Exp Brain Res 234:3597–3611
Ambike S, Mattos D, Zatsiorsky VM, Latash ML (2018) Systematic, unintended drifts in the cyclic force produced with the fingertips. Mot Control 22:82–99
Andersson G, Hagman J, Talianzadeh R, Svedberg A, Larsen HC (2002) Effect of cognitive load on postural control. Brain Res Bull 58:135–139
Bolbecker AR, Apthorp D, Martin AS, Tahayori B, Moravec L, Gomez KL, O’Donnell BF, Newman SD, Hetrick WP (2018) Disturbances of postural sway components in cannabis users. Drug Alcohol Depend 190:54–61
Bottaro A, Casadio M, Morasso PG, Sanguineti V (2005) Body sway during quiet standing: is it the residual chattering of an intermittent stabilization process? Hum Mov Sci 24:588–615
Danna-Dos-Santos A, Degani AM, Zatsiorsky VM, Latash ML (2008) Is voluntary control of natural postural sway possible? J Mot Behav 40:179–185
Degani AM, Leonard CT, Danna-Dos-Santos A (2017) The effects of early stages of aging on postural sway: a multiple domain balance assessment using a force platform. J Biomech 64:8–15
Diedrichsen J, Shadmehr R, Ivry RB (2010) The coordination of movement: optimal feedback control and beyond. Trends Cognit Sci 14:31–39
Duarte M, Zatsiorsky VM (1999) Patterns of center of pressure migration during prolonged unconstrained standing. Mot Control 3:12–27
Feldman AG (1966) Functional tuning of the nervous system with control of movement or maintenance of a steady posture. II. Controllable parameters of the muscle. Biophysics 11:565–578
Feldman AG (1986) Once more on the equilibrium-point hypothesis (λ-model) for motor control. J Mot Behav 18:17–54
Feldman AG (2015) Referent control of action and perception: Challenging conventional theories in behavioral science. Springer, New York
Feldman AG (2018) Indirect, referent control of motor actions underlies directional tuning of neurons. J Neurophysiol. https://doi.org/10.1152/jn.00575.2018. (In press)
Latash ML (2010) Motor synergies and the equilibrium-point hypothesis. Mot Control 14:294–322
Latash ML (2012) The bliss (not the problem) of motor abundance (not redundancy). Exp Brain Res 217:1–5
Latash ML (2017) Biological movement and laws of physics. Mot Control 21:327–344
Latash ML (2018) Muscle coactivation: definitions, mechanisms, and functions. J Neurophysiol 120(1):88–104
Latash ML, Zatsiorsky VM (1993) Joint stiffness: myth or reality? Hum Mov Sci 12:653–692
Latash ML, Zatsiorsky VM (2016) Biomechanics and motor control: defining central concepts. Academic Press, New York
Latash ML, Friedman J, Kim SW, Feldman AG, Zatsiorsky VM (2010) Prehension synergies and control with referent hand configurations. Exp Brain Res 202:213–229
Martin V, Scholz JP, Schöner G (2009) Redundancy, self-motion, and motor control. Neural Comput 21:1371–1414
Michalska J, Kamieniarz A, Fredyk A, Bacik B, Juras G, Słomka KJ (2018) Effect of expertise in ballet dance on static and functional balance. Gait Posture 64:68–74
Mochizuki L, Duarte M, Amadio AC, Zatsiorsky VM, Latash ML (2006) Changes in postural sway and its fractions in conditions of postural instability. J Appl Biomech 22:51–66
Monteiro Ferronato PA, Barela JA (2011) Age-related changes in postural control: rambling and trembling trajectories. Mot Control 15:481–493
Mullick AA, Turpin NA, Hsu SC, Subramanian SK, Feldman AG, Levin MF (2018) Referent control of the orientation of posture and movement in the gravitational field. Exp Brain Res 236:381–398
Prilutsky BI, Zatsiorsky VM (2002) Optimization-based models of muscle coordination. Exerc Sport Sci Rev 30:32–38
Rasouli O, Solnik S, Furmanek MP, Piscitelli D, Falaki A, Latash ML (2017) Unintentional drifts during quiet stance and voluntary body sway. Exp Brain Res 235:2301–2316
Reschechtko S, Latash ML (2017) Stability of hand force production: I. Hand level control variables and multi-finger synergies. J Neurophysiol 118:3152–3164
Reschechtko S, Zatsiorsky VM, Latash ML (2014) Stability of multi-finger action in different spaces. J Neurophysiol 112:3209–3218
Sarabon N, Rosker J (2013) Effect of 14 days of bed rest in older adults on parameters of the body sway and on the local ankle function. J Electromyogr Kinesiol 23:1505–1511
Sarabon N, Panjan A, Latash ML (2013) The effects of aging on the rambling and trembling components of postural sway: Effects of motor and sensory challenges. Gait Posture 38:637–642
Shin S, Sosnoff JJ (2017) Spinal cord injury and seated postural control: a test of the rambling and trembling hypothesis. Mot Control 21:443–456
Shin S, Motl RW, Sosnoff JJ (2011) A test of the rambling and trembling hypothesis: multiple sclerosis and postural control. Mot Control 15:568–579
Speedtsberg MB, Christensen SB, Andersen KK, Bencke J, Jensen BR, Curtis DJ (2017) Impaired postural control in children with developmental coordination disorder is related to less efficient central as well as peripheral control. Gait Posture 51:1–6
Todorov E (2004) Optimality principles in sensorimotor control. Nat Neurosci 7:907–915
Vaillancourt DE, Russell DM (2002) Temporal capacity of short-term visuomotor memory in continuous force production. Exp Brain Res 145:275–285
Wilhelm L, Zatsiorsky VM, Latash ML (2013) Equifinality and its violations in a redundant system: multi-finger accurate force production. J Neurophysiol 110:1965–1973
Winter DA, Prince F, Frank JS, Powell C, Zabjek KF (1996) Unified theory regarding A/P and M/L balance in quiet stance. J Neurophysiol 75:2334–2343
Wollesen B, Voelcker-Rehage C, Regenbrecht T, Mattes K (2016) Influence of a visual-verbal Stroop test on standing and walking performance of older adults. Neuroscience 318:166–177
Yamagata M, Falaki A, Latash ML (2018) Effects of voluntary agonist-antagonist co-activation on stability of vertical posture. Mot Control (In press)
Zatsiorsky VM, Duarte M (1999) Instant equilibrium point and its migration in standing tasks: rambling and trembling components of the stabilogram. Mot Control 3:28–38
Zatsiorsky VM, Duarte M (2000) Rambling and trembling in quiet standing. Mot Control 4:185–200
Zhang L, Feldman AG, Levin MF (2018) Vestibular and corticospinal control of human body orientation in the gravitational field. J Neurophysiol. https://doi.org/10.1152/jn.00483.2018
Zhou T, Solnik S, Wu Y-H, Latash ML (2014) Unintentional movements produced by back-coupling between the actual and referent body configurations: violations of equifinality in multi-joint positional tasks. Exp Brain Res 232:3847–3859
Zhou T, Zhang L, Latash ML (2015) Intentional and unintentional multi-joint movements: their nature and structure of variance. Neuroscience 289:181–193
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The study was in part supported by NIH grant NS095873.
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Yamagata, M., Popow, M. & Latash, M.L. Beyond rambling and trembling: effects of visual feedback on slow postural drift. Exp Brain Res 237, 865–871 (2019). https://doi.org/10.1007/s00221-019-05470-w
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DOI: https://doi.org/10.1007/s00221-019-05470-w