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Experimental Brain Research

, Volume 82, Issue 1, pp 97–106 | Cite as

Head stabilization during various locomotor tasks in humans

I. Normal subjects
  • T. Pozzo
  • A. Berthoz
  • L. Lefort
Article

Summary

Head kinematics were studied in ten normal subjects while they executed various locomotor tasks. The movement of the body was recorded with a video system which allowed a computer reconstruction of motion of joint articulations and other selected points on the body in three dimensions. Analyses focus on head translation along the vertical axis and rotation in the sagittal plane. This was done by recording the displacement of a line approximating the plane of horizontal semi-circular canals (the Frankfort plane: F-P). Four conditions were studied: free walking (W) walking in place (WIP) running in place (R) and hopping (H). In the 4 experimental conditions, amplitude and velocity of head translation along the vertical axis ranged from 1 cm to 25 cm and 0.15 m/s to 1.8 m/s. In spite of the disparities in the tasks regarding the magnitude of dynamic components, we found a significant stabilization of the F-P around the earth horizontal. Maximum amplitude of F-P rotation did not exceed 20° in the 4 situations. Vertical angular velocities increased from locomotion tasks to the dynamic equilibrium task although the maximum values remained less than 140°/s. Predominant frequencies of translations and rotations in all the tasks were within the range 0.4–3.5 Hz and harmonics were present up to 6–8 Hz. During walking in darkness, mean head position is tilted downward, with the F-P always below the earth horizontal. Darkness did not significantly influence the amplitude and velocity of head angular displacement during W, WIP and R, but during H the amplitude decreased by 37%. Residual head angular displacement is found to compensate for head translation during the 4 conditions. Our study emphasizes the importance of head stabilization as part of the postural control system and described as a basis for inertial guidance.

Key words

Kinematic Locomotion Head stabilization Vision Vestibular Voluntary movement Man 

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References

  1. Barlow JS (1964) Inertial navigation as basis for animal navigation. J Theor Biol 6: 76–117PubMedGoogle Scholar
  2. Bernstein NA (1967) The coordination and regulation of movements. Pergamon Press, New YorkGoogle Scholar
  3. Berthoz A, Pozzo T (1988) Intermittent head stabilization during postural and locomotory tasks in humans. In: Amblard B, Berthoz A, Clarac F (eds) Development, adaptation and modulation of posture and gait. Elsevier, Amsterdam, pp, 189–198Google Scholar
  4. Bowman BM (1971) An analytical model of a vehicle occupant for use in crash simulation. PhD dissertation. Dept Engineering Mechanics, University of MichiganGoogle Scholar
  5. Cappozzo A (1982) Low frequency self-generated vibration during ambulation in normal men. J Biomech 8: 599–609Google Scholar
  6. Clément G, Pozzo T, Berthoz A (1988) Contribution of eye positioning to control of the upside-down standing posture. Exp Brain Res 73: 569–576Google Scholar
  7. De Beer GR (1947) How animals hold their heads. Proc Linn Soc Lond 159: 125–139Google Scholar
  8. Droulez J, Berthoz A (1986) Servo-controlled (conservative) versus topological (projective) mode of sensory motor control. In: Bles W, Brandt T (eds) Disorders of posture and gait. Elsevier, Amsterdam, pp 83–97Google Scholar
  9. Droulez J (1988) Topological aspects of sensori-motor control. In: Gurflnkel VS, Ioffe ME, Massion J, Roll JP (eds) Stance and motion: facts and concepts. Plenum Press, New York, pp 251–259Google Scholar
  10. Dunlap K, Mowrer OH (1930) Head movements and eye functions of birds. J Comp Psychol 2: 99–113Google Scholar
  11. Ewing CL, Thomas DJ (1972) Human head and neck response to impact acceleration. NAMRL Monogr 21Google Scholar
  12. Ferrigno G, Pedotti A (1985) Elite: a digital dedicated hardward system for movement analysis via real time TV-signal processing. IEEE Trans Biomed Eng 32: 943–950Google Scholar
  13. Friedman MB (1975) Visual control of head movements during avian locomotion. Nature (Lond) 255: 67–69Google Scholar
  14. Frost BJ (1978) The optokinetic basis of head-bobing in the pigeon. J Exp Biol 74: 187–195Google Scholar
  15. Gioanni H (1988) Stabilizing gaze reflexe in the pigeon (Columbia livia). Exp Brain Res 69: 567–582Google Scholar
  16. Girard L (1923) Le plan des canaux semi-circulaires horizontaux considérés comme plan horizontal de la tête. Bull Mém Soc Anthropol (Paris) Sér 7, 4: 14–33Google Scholar
  17. Girard L (1930) L'attitude normale de la tête déterminée par le labyrinthe de l'oreille. Oto-rhino-laryngol Int 14: 517–537Google Scholar
  18. Goldberg J, Peterson BW (1986) Reflex and mechanical contributions to head stabilization in alert cats. J Neurophysiol 54: 90–109Google Scholar
  19. Grossman GE, Leigh RJ, Abel LA, Lanska DJ, Thurston SE (1988) Frequency and velocity of rotational head perturbation during locomotion. Exp Brain Res 70: 470–476Google Scholar
  20. Guitton D, Kearney RE, Wereley N, Peterson BW (1986) Visual, vestibular and voluntary contribution to human head stabilization. Exp Brain Res 64: 59–69PubMedGoogle Scholar
  21. Gurfinkel VS, Lipshits MI, Popov KE (1981) Stabilization of the body as the main task of postural regulation. Fiziol Cheloveka 7: 400–410 (translated from Russian)Google Scholar
  22. Hess WR (1943) Teleokinetisches und ereimatisches kraftsystem in der Biomotorik. Helv Physiol Pharmacol Acta 1: C62-C63.Google Scholar
  23. Keshner EA, Woollacott MH, Debu B (1988) Neck, trunk and limb muscle responses during postural perturbations in humans. Exp Brain Res 71: 455–466Google Scholar
  24. Lacour M, Borel L, Barthélémy J, Harlay F, Xerri C (1987) Dynamic properties of the vertical otolith neck reflexes in the alert cat. Exp Brain Res 65: 559–568Google Scholar
  25. Mayne R (1950) The operating principle of the vestibular mechanism. Symp. “Psychophysiological factors in spatial orientation”, Pensacola FL. Navexos P-965Google Scholar
  26. Mayne R (1974) A system concept of the vestibular organs. In: Kornhuber HH (eds) Handbook of sensory physiology: vestibular system, Vol VI/2. Springer, New York, pp 493–580Google Scholar
  27. Miles FA (1988) Visual mechanisms underlying the stabilization of gaze. In: Jain R, Weymouth T (eds) Exploratory vision. Springer, Berlin, pp 46–72Google Scholar
  28. Nashner LM, Shupert CL, Horak FB (1986) Head trunk movement coordination in the standing posture. Progr Brain Res 76: 243–251Google Scholar
  29. Owen BM, Lee DN (1986) Establishing a frame of reference for action. In: Wade MG, Whiting HTA (eds) Motor development in children: aspect of coordination and control. Martinus, DordrechtGoogle Scholar
  30. Parkinson J (1817) Essay on the shaking palsy. London. Reprint in: Macdonald Critchley (ed) (1955). James Parkinson. Macmillan, LondonGoogle Scholar
  31. Pozzo T, Berthoz A, Lefort L (1989) Head kinematic during various motor tasks in humans. Progr Brain Res 80: 377–383Google Scholar
  32. Pozzo T, Berthoz A, Lefort L (1990) Head kinematics during complex movements. In: Berthoz A, Graf W, Vidal PP (eds) Head and neck sensory-motor system. Oxford University Press, New York (in press)Google Scholar
  33. Rozendal RH (1986) Biomechanics of standing and walking. In: Bles W, Brandt T (eds) Disorders of posture and gait. Elsevier, Amsterdam, pp 3–16Google Scholar
  34. Siegel IM (1966) Posture in the blind. American Foundation for the Blind, New York (eds). Research Ser 15Google Scholar
  35. Shupert CL, Black O, Horak FB, Nashner, LM (1988) Coordination of the head and body in response to support surface translations in normals and patients with bilaterally reduced vestibular function. In: Amblard B, Berthoz A, Clarac F (eds) Development, adaptation and modulation of posture and gait. Elsevier, Amsterdam, pp 281–289Google Scholar
  36. Viviani P, Berthoz A (1975) Dynamic of the head-neck system in response to small perturbations: analysis and modelling in the frequency domain. Biol Cybern 19: 19–37Google Scholar
  37. Wilson VJ, Melvill Jones G (1979) Mammalian vestibular physiology. Plenum Press, New YorkGoogle Scholar

Copyright information

© Springer-Verlag 1991

Authors and Affiliations

  • T. Pozzo
    • 1
  • A. Berthoz
    • 1
  • L. Lefort
    • 1
  1. 1.Laboratoire de Physiologie Neurosensorielle du CNRSParis CedexFrance

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