Conrad Wall

Summary

Affiliation: Massachusetts Institute of Technology
Country: USA

Publications

  1. doi request reprint Vibrotactile feedback of mediolateral trunk tilt or foot pressure increases locomotor performance in healthy older adults--a pilot study
    Conrad Wall
    Department of Otology and Laryngology, Harvard Medical School, and the Jenks Vestibular Diagnostic Laboratory, Massachusetts Eye and Ear Infirmary, Boston, MA, USA
    Conf Proc IEEE Eng Med Biol Soc 2012:6145-8. 2012
  2. doi request reprint The design and development of a production prototype balance belt
    C Wall
    Department of Otology and Laryngology, Harvard Medical School, Massachusetts Eye and Ear Infirmary, Boston, MA 02114, USA
    Conf Proc IEEE Eng Med Biol Soc 2011:3524-8. 2011
  3. ncbi request reprint Effects of static orientation upon human optokinetic afternystagmus
    C Wall
    Harvard Medical School, Department of Otology and Laryngology, Boston, USA
    Acta Otolaryngol 119:16-23. 1999
  4. ncbi request reprint Recovery trajectories of vestibulopathic subjects after perturbations during locomotion
    C Wall
    Harvard Medical School, Department of Otology and Laryngology, Boston, MA, USA
    J Vestib Res 12:239-53. 2002
  5. ncbi request reprint Vestibular prostheses: the engineering and biomedical issues
    C Wall
    Harvard Medical School, Department of Otology and Laryngology, Boston, MA 02114, USA
    J Vestib Res 12:95-113. 2002
  6. pmc Vibrotactile tilt feedback improves dynamic gait index: a fall risk indicator in older adults
    Conrad Wall
    Massachusetts Eye and Ear Infirmary, Department of Otology and Laryngology, Harvard Medical School, Boston, United States
    Gait Posture 30:16-21. 2009
  7. ncbi request reprint Balance prostheses for postural control
    Conrad Wall
    Jenks Vestibular Diagnostic Laboratory, Massachusetts Eye and Ear Infirmary, 243 Charles Street, Boston, MA 02114 3096, USA
    IEEE Eng Med Biol Mag 22:84-90. 2003
  8. doi request reprint Effect of displacement, velocity, and combined vibrotactile tilt feedback on postural control of vestibulopathic subjects
    C Wall
    Department of Otology and Laryngology and Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA, USA
    J Vestib Res 20:61-9. 2010
  9. pmc Application of vibrotactile feedback of body motion to improve rehabilitation in individuals with imbalance
    Conrad Wall
    Department of Otolology and Laryngology, Harvard Medical School, and Jenks Vestibular Diagnostic Laboratory, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts, USA
    J Neurol Phys Ther 34:98-104. 2010
  10. ncbi request reprint Control of sway using vibrotactile feedback of body tilt in patients with moderate and severe postural control deficits
    C Wall
    Department of Otology and Laryngology, Harvard Medical School, and Jenks Vestibular Diagnostic Laboratory Massachusetts Eye and Ear Infirmary, Boston 02114, USA
    J Vestib Res 15:313-25. 2005

Research Grants

Collaborators

Detail Information

Publications28

  1. doi request reprint Vibrotactile feedback of mediolateral trunk tilt or foot pressure increases locomotor performance in healthy older adults--a pilot study
    Conrad Wall
    Department of Otology and Laryngology, Harvard Medical School, and the Jenks Vestibular Diagnostic Laboratory, Massachusetts Eye and Ear Infirmary, Boston, MA, USA
    Conf Proc IEEE Eng Med Biol Soc 2012:6145-8. 2012
    ..This pilot study compares the effects of two vibrotactile feedback devices during a locomotor task using similar groups of elder subjects...
  2. doi request reprint The design and development of a production prototype balance belt
    C Wall
    Department of Otology and Laryngology, Harvard Medical School, Massachusetts Eye and Ear Infirmary, Boston, MA 02114, USA
    Conf Proc IEEE Eng Med Biol Soc 2011:3524-8. 2011
    ..Because this new technology gets a patient to a higher level of function in a shorter number of trials, it offers an opportunity to advance rehabilitation by enabling more effective outcomes for the same number of treatment sessions...
  3. ncbi request reprint Effects of static orientation upon human optokinetic afternystagmus
    C Wall
    Harvard Medical School, Department of Otology and Laryngology, Boston, USA
    Acta Otolaryngol 119:16-23. 1999
    ..Application of horizontal axis optokinetic afternystagmus for clinical otolith function testing, and implications for altered gravity experiments are discussed...
  4. ncbi request reprint Recovery trajectories of vestibulopathic subjects after perturbations during locomotion
    C Wall
    Harvard Medical School, Department of Otology and Laryngology, Boston, MA, USA
    J Vestib Res 12:239-53. 2002
    ..Another possibility is a reduced sensitivity to motion inputs. This perturbation approach may prove useful for characterizing subtle vestibulopathies and similar changes in the human orientation mechanism after exposure to microgravity...
  5. ncbi request reprint Vestibular prostheses: the engineering and biomedical issues
    C Wall
    Harvard Medical School, Department of Otology and Laryngology, Boston, MA 02114, USA
    J Vestib Res 12:95-113. 2002
    ..In this "white paper", we consider these issues in the context of prototype baseline prosthetic devices...
  6. pmc Vibrotactile tilt feedback improves dynamic gait index: a fall risk indicator in older adults
    Conrad Wall
    Massachusetts Eye and Ear Infirmary, Department of Otology and Laryngology, Harvard Medical School, Boston, United States
    Gait Posture 30:16-21. 2009
    ..1+/-0.4 to 20.8+/-0.3 (p<0.05). We conclude that vibrotactile tilt feedback improves both control of mediolateral sway during gait and dynamic gait index. Both are fall risk indicators for this population...
  7. ncbi request reprint Balance prostheses for postural control
    Conrad Wall
    Jenks Vestibular Diagnostic Laboratory, Massachusetts Eye and Ear Infirmary, 243 Charles Street, Boston, MA 02114 3096, USA
    IEEE Eng Med Biol Mag 22:84-90. 2003
  8. doi request reprint Effect of displacement, velocity, and combined vibrotactile tilt feedback on postural control of vestibulopathic subjects
    C Wall
    Department of Otology and Laryngology and Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA, USA
    J Vestib Res 20:61-9. 2010
    ..The improvement by using a predictor is consistent with compensating for a neural processing delay...
  9. pmc Application of vibrotactile feedback of body motion to improve rehabilitation in individuals with imbalance
    Conrad Wall
    Department of Otolology and Laryngology, Harvard Medical School, and Jenks Vestibular Diagnostic Laboratory, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts, USA
    J Neurol Phys Ther 34:98-104. 2010
    ..A vibrotactile feedback device developed in the author's laboratory is described...
  10. ncbi request reprint Control of sway using vibrotactile feedback of body tilt in patients with moderate and severe postural control deficits
    C Wall
    Department of Otology and Laryngology, Harvard Medical School, and Jenks Vestibular Diagnostic Laboratory Massachusetts Eye and Ear Infirmary, Boston 02114, USA
    J Vestib Res 15:313-25. 2005
    ..This trend was found for both SOT 5 and 6, as well as the medium and large MCT. Additionally, during the MCT, the peak deflection and mean recovery time also decreased significantly...
  11. doi request reprint Responses evoked by a vestibular implant providing chronic stimulation
    Lara A Thompson
    Jenks Vestibular Physiology Laboratory, Massachusetts Eye and Ear Infirmary, Boston, MA, USA
    J Vestib Res 22:11-5. 2012
    ..In this review, we provide an overview of our previous and current work directed towards the eventual clinical implementation of an implantable vestibular prosthesis...
  12. pmc The effect of vibrotactile feedback on postural sway during locomotor activities
    Kathleen H Sienko
    Division of Health Sciences and Technology, Harvard University Massachusetts Institute of Technology, Cambridge, MA, USA
    J Neuroeng Rehabil 10:93. 2013
    ..The goal of this study was to characterize the effects of two real-time feedback displays on locomotor performance during four gait-based tasks ranging in difficulty...
  13. ncbi request reprint Reduction of postural sway by use of a vibrotactile balance prosthesis prototype in subjects with vestibular deficits
    Erna Kentala
    Department of Otology and Laryngology and the Jenks Vestibular Diagnostic Laboratory Massachusetts Eye and Ear Infumary, Harvard Medical School, Boston 02114, USA
    Ann Otol Rhinol Laryngol 112:404-9. 2003
    ..Some of the subjects were able to stand throughout the test with the device turned on, whereas they otherwise constantly fell...
  14. pmc Vestibular prosthesis tested in rhesus monkeys
    Richard F Lewis
    Jenks Vestibular Physiology Laboratory, Massachusetts Eye and Ear Infirmary, Department of Otology and Laryngology at the Harvard Medical School, Boston, MA 02114, USA
    Conf Proc IEEE Eng Med Biol Soc 2011:2277-9. 2011
    ....
  15. pmc Biofeedback improves postural control recovery from multi-axis discrete perturbations
    Kathleen H Sienko
    Massachusetts Institute of Technology, Cambridge, MA, USA
    J Neuroeng Rehabil 9:53. 2012
    ..The purpose of this study was to examine the effect of multidirectional vibrotactile biofeedback on postural stability during discrete multidirectional support surface perturbations...
  16. ncbi request reprint Recovery from perturbations during paced walking
    Lars I E Oddsson
    Neuromuscular Research Center, Boston University, 19 Deerfield St, 4th Floor, Boston, MA 02215, USA
    Gait Posture 19:24-34. 2004
    ..Five to six steps were required for complete recovery in the subjects tested in this study...
  17. ncbi request reprint Effects of multi-directional vibrotactile feedback on vestibular-deficient postural performance during continuous multi-directional support surface perturbations
    K H Sienko
    Division of Health Sciences and Technology, Harvard Massachusetts Institute of Technology, Cambridge, MA, USA
    J Vestib Res 18:273-85. 2008
    ..Therefore, a spatial resolution of 90 degrees (4 columns) seems to be as effective as a spatial resolution of 22.5 degrees (16 columns) for control of standing...
  18. ncbi request reprint Balance prosthesis based on micromechanical sensors using vibrotactile feedback of tilt
    C Wall
    Harvard Medical School, Department of Otology and Laryngology, Cambridge, MA 02139, USA
    IEEE Trans Biomed Eng 48:1153-61. 2001
    ..The results suggest that healthy normal subjects can reduce their lateral postural sway using head tilt information as provided by a vibrotactile display. Thus, further testing with balance-impaired subjects is now warranted...
  19. ncbi request reprint Quantifying ataxia: ideal trajectory analysis--a technical note
    M D McPartland
    Harvard Medical School, Department of Orthopaedics, Massachusetts General Hospital Biomotion Laboratory, Boston, MA 02114, USA
    J Rehabil Res Dev 37:445-54. 2000
    ..014 and 0.006, respectively), indicating that the ideal trajectory analysis distinguishes persons with labyrinth disorder from those without. The COM trajectories also identify movement inefficiencies attributable to vestibulopathy...
  20. ncbi request reprint Vestibular evoked myogenic potentials versus vestibular test battery in patients with Meniere's disease
    Steven D Rauch
    Department of Otolaryngology, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston University Medical Center, Boston, Massachusetts 02114, USA
    Otol Neurotol 25:981-6. 2004
    ....
  21. ncbi request reprint Eye movements in response to electric stimulation of the human posterior ampullary nerve
    Conrad Wall
    Department of Otology and Laryngology, Harvard Medical School, Boston, MA, USA
    Ann Otol Rhinol Laryngol 116:369-74. 2007
    ..It remains to be shown, however, that electric stimulation of the human end organ or its vestibular nerve branches is capable of eliciting a nystagmic eye movement response...
  22. ncbi request reprint The human oculomotor response to simultaneous visual and physical movements at two different frequencies
    C Wall
    Department of Otology and Laryngology, Harvard Medical School, Massachusetts Eye and Ear Infirmary, 243 Charles St. Boston, MA 02114, USA
    J Vestib Res 11:81-9. 2001
    ..The emergence of new frequencies indicates non-linear processing consistent with an agreement-detector system that have previously proposed...
  23. ncbi request reprint Multivariate vestibular testing: thresholds for bilateral Ménière's disease and aminoglycoside ototoxicity
    P S Dimitri
    Harvard University-Massachusetts Institute of Technology Division of Health Sciences and Technology, Boston, MA, USA
    J Vestib Res 11:391-404. 2001
    ..Results showed up to a increase in estimated test sensitivity (specificity = 95%) from 67%(current method)to 82%(new method)in identifying bilateral vestibular hypofunction...
  24. ncbi request reprint Multivariate vestibular testing: laterality of unilateral Ménière's disease
    P S Dimitri
    Harvard University-Massachusetts Institute of Technology Division of Health Sciences and Technology, Boston, MA, USA
    J Vestib Res 11:405-12. 2001
    ..In the absence of spontaneous or positional nystagmus, asymmetry measurements significantly enhanced right/left discrimination. Directional preponderance was insignificant in determining the side of lesion...
  25. pmc Effects of practicing tandem gait with and without vibrotactile biofeedback in subjects with unilateral vestibular loss
    Marco Dozza
    Department of Electronics, Computer Sciences and Systems, University of Bologna, Bologna, Italy
    J Vestib Res 17:195-204. 2007
    ....
  26. ncbi request reprint Tilt determination in MEMS inertial vestibular prosthesis
    Marc S Weinberg
    Draper Laboratory, Cambridge, MA 02139, USA
    J Biomech Eng 128:943-56. 2006
    ..Such a device would be used as a temporary aid during recovery from ablative inner-ear surgery, a postural monitor during rehabilitation (for example, hip surgery), and as a permanent prosthesis for those elderly prone to falls...
  27. ncbi request reprint Vibrotactile display coding for a balance prosthesis
    Prajoy P Kadkade
    Department of Otolaryngology Head and Neck Surgery, New York Presbyterian The University Hospitals of Columbia and Cornell, New York, NY 10032, USA
    IEEE Trans Neural Syst Rehabil Eng 11:392-9. 2003
    ..The quantitative CTT measure of performance can logically be extended to other applications of vibrotactile displays and to other kinds of display schemes used for rehabilitation...
  28. ncbi request reprint Determining the effectiveness of a vibrotactile balance prosthesis
    Robert J Peterka
    Neurological Sciences Institute, Oregon Health and Science University, Portland, 97006, USA
    J Vestib Res 16:45-56. 2006
    ..Although this method was illustrated using a specific balance prosthesis, the method is general and could be applied to balance prostheses that utilize other technology...

Research Grants4