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Postural Compensation for Unilateral Vestibular Loss

By Robert J. Peterka, Kennyn D. Statler, Diane M. Wrisley and Fay B. Horak

Abstract

Postural control of upright stance was investigated in well-compensated, unilateral vestibular loss (UVL) subjects compared to age-matched control subjects. The goal was to determine how sensory weighting for postural control in UVL subjects differed from control subjects, and how sensory weighting related to UVL subjects’ functional compensation, as assessed by standardized balance and dizziness questionnaires. Postural control mechanisms were identified using a model-based interpretation of medial–lateral center-of-mass body-sway evoked by support-surface rotational stimuli during eyes-closed stance. The surface-tilt stimuli consisted of continuous pseudorandom rotations presented at four different amplitudes. Parameters of a feedback control model were obtained that accounted for each subject’s sway response to the surface-tilt stimuli. Sensory weighting factors quantified the relative contributions to stance control of vestibular sensory information, signaling body-sway relative to earth-vertical, and proprioceptive information, signaling body-sway relative to the surface. Results showed that UVL subjects made significantly greater use of proprioceptive, and therefore less use of vestibular, orientation information on all tests. There was relatively little overlap in the distributions of sensory weights measured in UVL and control subjects, although UVL subjects varied widely in the amount they could use their remaining vestibular function. Increased reliance on proprioceptive information by UVL subjects was associated with their balance being more disturbed by the surface-tilt perturbations than control subjects, thus indicating a deficiency of balance control even in well-compensated UVL subjects. Furthermore, there was some tendency for UVL subjects who were less able to utilize remaining vestibular information to also indicate worse functional compensation on questionnaires

Topics: Neuroscience
Publisher: Frontiers Research Foundation
OAI identifier: oai:pubmedcentral.nih.gov:3167354
Provided by: PubMed Central

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Citations

  1. (2010).Long-termeffectsofvestibular compensation on balance control and sensory organization after unilateral deafferentation due to vestibular schwannoma surgery.
  2. (2009). A contemporary review of balance dysfunction following vestibular schwannoma surgery.
  3. (1999). A multisensory integration model of human stance control.
  4. (2010). accepted: 18
  5. (1990). Age-related changes in human posture control: sensory organization tests.
  6. (2005). Biomechanics and Motor Control of Human Movement. NewYork:
  7. (2004). Cerebellar encoding of limb position.
  8. (2003). Change in dizziness handicap after vestibular schwannoma excision.
  9. (2011). Compensation for unilateral vestibular loss
  10. (1993). Computerized dynamic posturography,”
  11. (2002). Deficits and recovery of head and trunk orientation and stabilization after unilateral vestibular loss.
  12. (2000). Development of the vestibular disorders activities of daily living scale.
  13. Dickman,J.D.,Newlands,S.D.,andHess, B.J.(1999).Computationof inertial motion: neural strategies to resolve ambiguous otolith information.
  14. (1990). Dynamicposturographyinthediagnosis and management of dizziness and balance disorders.
  15. Head Neck Surg.
  16. (2002). Humans integrate visual and haptic informationinastatisticallyoptimal fashion.
  17. (1988). Identification of human postural dynamics.
  18. (2008). Impulsive testing of semicircularcanalfunction.Prog.BrainRes.
  19. (2006). Multisensory control of human upright stance.
  20. (2002). Neural processing of gravitoinertial cues in humans. iii. modeling tilt and translation responses.
  21. (2011). Non-linear stimulusresponse behavior of the human stance control system is predicted by optimization of a system with sensory and motor noise.
  22. (2003). observed for stance and gait tasks during recovery from an acute unilateral peripheral vestibular deficit.
  23. (1971). Physiology of peripheral neurons innervating semicircular canals of the squirrel monkey. III. Variations among units in their discharge properties.
  24. (2011). Postural compensation for unilateral vestibular loss.
  25. (2005). Postural control in patients with unilateral vestibular lesions is more impaired in the roll than the pitch plane: a static and dynamic posturography study.
  26. (2004). Postural stability after vestibular schwannoma surgery.
  27. (2011). Pre-operative vestibular pattern and balance compensation after vestibular schwannoma surgery.
  28. (1988). Recovery from unilateral labyrinthectomy in rhesus monkey.
  29. (1991). Recovery of postural control after an acute unilateral vestibular lesion in humans.
  30. (2007). Relationship between dynamic balance and self-reported handicap in patients who have unilateral peripheral vestibular loss.
  31. (2006). Sensorimotor postural rearrangement after unilateral vestibular deafferentation in patients with acoustic neuroma.
  32. (2003). Simplifying the complexities of maintaining balance.
  33. Some aspects of life quality after surgery for acoustic neuroma.
  34. (1998). Subjective visual horizontal during follow-up after unilateral vestibular deafferentation with gentamicin.
  35. (1970). System Identification for Self-Adaptive Control.
  36. (2001). System Identification: A Frequency Domain Approach.
  37. (1994). The ‘deceleration response’ to transient perturbation of upright stance.
  38. (1995). The activities-specific balance confidence (ABC)
  39. (1990). The development of the dizziness handicap inventory.
  40. (1990). The human horizontal vestibulo-ocular reflex in response to high-acceleration stimulation before and after unilateral vestibular neurectomy.
  41. (2000). Vestibular compensation and substitution.
  42. (1995). Vestibular compensation: a review of the oculomotor, neural and clinical consequences of unilateral vestibular loss.
  43. (2007). Vestibular compensation: clinical changes in vestibular function with time after unilateral vestibular loss,”
  44. (2010). Vestibular function after acute vestibular neuritis.
  45. (1997). Vestibular-neck interaction and transformation of sensory coordinates.
  46. (2004). Vestibularschwannomasurgeryoutcomes: our multidisciplinary experience in 400 cases over 17 years.