Haptic cues for orientation and postural control

Haptic cues from fingertip contact with a stable surface attenuate body sway in subjects even when the contact forces are too small to provide physical support of the body. We investigated how haptic cues derived from contact of a cane with a stationary surface at low force levels aids postural control in sighted and congenitally blind individuals. Five sighted (eyes closed) and five congenitally blind subjects maintained a tandem Romberg stance in five conditions: (1) no cane; (2, 3) touch contact (<2 N of applied force) while holding the cane in a vertical or slanted orientation; and (4, 5) force contact (as much force as desired) in the vertical and slanted orientations. Touch contact of a cane at force levels below those necessary to provide significant physical stabilization was as effective as force contact in reducing postural sway in all subjects, compared to the no-cane condition. A slanted cane was far more effective in reducing postural sway than was a perpendicular cane. Cane use also decreased head displacement of sighted subjects far more than that of blind subjects. These results suggest that head movement control is linked to postural control through gaze stabilization reflexes in sighted subjects; such reflexes are absent in congenitally blind individuals and may account for their higher levels of head displacement.

[1]  J A Kelso,et al.  Dynamic pattern generation in behavioral and neural systems. , 1988, Science.

[2]  R. Massof,et al.  Rod sensitivity relative to cone sensitivity in retinitis pigmentosa. , 1979, Investigative ophthalmology & visual science.

[3]  M. Turvey,et al.  Phase transitions and critical fluctuations in the visual coordination of rhythmic movements between people. , 1990, Journal of experimental psychology. Human perception and performance.

[4]  G. Keppel.  Design and analysis: A researcher's handbook, 3rd ed. , 1991 .

[5]  C. Marsden,et al.  Human postural responses. , 1981, Brain : a journal of neurology.

[6]  R D Easton.  Inherent problems of attempts to apply sonar and vibrotactile sensory aid technology to the perceptual needs of the blind. , 1992, Optometry and vision science : official publication of the American Academy of Optometry.

[7]  T. R Fisher,et al.  Active touch. The mechanism of recognition of objects by manipulation. A multi-disciplinary approach: Edited by George Gordon. Pp. 275. Pergamon Press, Oxford, 1978. Hard cover £19.50, flexi cover £11.00 , 1979 .

[8]  P. Worchel,et al.  Space Perception and Orientation by the Blind , 1951 .

[9]  J. Kelso.  Phase transitions and critical behavior in human bimanual coordination. , 1984, The American journal of physiology.

[10]  G. Keppel,et al.  Design and Analysis: A Researcher's Handbook , 1976 .

[11]  M T Turvey,et al.  Haptically perceiving the distances reachable with hand-held objects. , 1988, Journal of experimental psychology. Human perception and performance.

[12]  P. Matthews.  Proprioceptors and their contribution to somatosensory mapping: complex messages require complex processing. , 1988, Canadian journal of physiology and pharmacology.

[13]  David H. Warren,et al.  Blindness and Early Childhood Development , 1977 .

[14]  A J Spaepen,et al.  Comparison of the movements of the center of gravity and of the center of pressure in stabilometric studies. , 1977, Agressologie: revue internationale de physio-biologie et de pharmacologie appliquees aux effets de l'agression.

[15]  Murray Mp,et al.  Center of gravity, center of pressure, and supportive forces during human activities. , 1967 .

[16]  L. Nashner,et al.  Properties of postural adjustments associated with rapid arm movements. , 1982, Journal of neurophysiology.

[17]  J. Rieser,et al.  Mental Processes Mediating Independent Travel: Implications for Orientation and Mobility , 1982 .

[18]  J. Kelso,et al.  Nonequilibrium phase transitions in coordinated biological motion: critical fluctuations , 1986 .

[19]  J. Kelso,et al.  Symmetry breaking dynamics of human multilimb coordination. , 1992, Journal of experimental psychology. Human perception and performance.

[20]  David H. Warren,et al.  Intermodality interactions in spatial localization , 1970 .

[21]  Belen'kiĭ Ve,et al.  Control elements of voluntary movements , 1967 .

[22]  J. Kelso,et al.  Action-Perception as a Pattern Formation Process , 2018, Attention and Performance XIII.

[23]  J. Lackner,et al.  Stabilization of posture by precision contact of the index finger. , 1994, Journal of vestibular research : equilibrium & orientation.

[24]  John J. Jeka,et al.  The Dynamic Pattern Approach to Coordinated Behavior: A Tutorial Review , 1989 .

[25]  D. H. Warren,et al.  Intermodality relations in localization in blind and sighted people , 1970 .

[26]  D. Winter,et al.  Assessment of balance control in humans. , 1990, Medical progress through technology.

[27]  A. Edwards,et al.  Body sway and vision. , 1946, Journal of experimental psychology.

[28]  J. Gibson.  The Senses Considered As Perceptual Systems , 1967 .

[29]  R. H. Wimmers,et al.  Phase transitions in rhythmic tracking movements: A case of unilateral coupling , 1992 .

[30]  L. W. Farmer.  Mobility devices. , 1978, Bulletin of prosthetics research.

[31]  T. Yoshioka,et al.  Neural mechanisms of tactual form and texture perception. , 1992, Annual review of neuroscience.

[32]  Jones Gm,et al.  Reflex vestibular control of head movement in man. , 1971 .

[33]  R J Leigh,et al.  Eye movements of the blind. , 1980, Investigative ophthalmology & visual science.

[34]  R. Klatzky,et al.  There's more to touch than meets the eye: The salience of object attributes for haptics with and without vision. , 1987 .

[35]  J. Rieser,et al.  Sensitivity to Perspective Structure While Walking without Vision , 1986, Perception.

[36]  B W Peterson,et al.  Reflex and mechanical contributions to head stabilization in alert cats. , 1986, Journal of neurophysiology.

[37]  Posture in the blind : the use of its determinants in the diagnosis and treatment of its problems , 1966 .

[38]  V. L. Senders,et al.  Measurement and statistics , 1958 .

[39]  B. L. Bentzen,et al.  Memory for Verbally Presented Routes: A Comparison of Strategies Used by Blind and Sighted People , 1987 .