Photo of Fay B. Horak, Ph.D., P.T.

Fay B. Horak Ph.D., P.T.

Dr. Fay Horak studies neurological disorders that effect balance and gait in the elderly, people with Parkinson's disease, multiple sclerosis, cerebellar ataxia, vestibular injury or disease, diabetic neuropathy, and back pain.

Recent awards:

One of the most cited articles over the last 125 years by the American Physiological Society for 2012: Horak FB, Nashner LM. Central programming of postural movements - adaptation to altered support-surface configurations. Journal of Neurophysiology. 55: 1369-1381, 1986. OHSU Technology Innovation Award/Patent 7.867.140 for 2012 National Translational Neurology Researcher Award, awarded by the Neurology Section of the American Physical Therapy Association for 2011 2014 Medical Research Foundation Mentor Award. The Mentor Award is presented to an Oregonian who has provided outstanding leadership and support of health research, education or the advancement of health care.

Professor of neurology:

Department of Neurology
Department of Biomedical Engineering
Department of Physiology and Pharmacology

Faculty member:
Neuroscience Graduate Program

Honorary faculty:
University of Oregon
Pacific University
University of Calgary
University of Waterloo

PubMed Listing

Grants (current):

NIH, National Institute of Aging: Peripheral and Central Postural Disorders in the Elderly (1989-2019)

Veterans Affairs RR&D: Frontal cortex and gait freezing in Parkinson’s disease: rehabilitation impact (2014-2017)

Pacific Northwest Udall Center (UW, subcontract NIH): Balance/Gait Disorders in PD associated with Genetic inheritance (2015-2020)

NIH STTR Phase II: A Short Instrumented Test of Mobility for Neurological Disorders: ISAW (2014-2017)

SBIR from NIH: IMove: Instrumented Movement Analysis to Quantify Gait in Cerebral Palsy (2015-2017)

NIH, National Cancer Institue: Preventing Falls after Cancer: Tai Chi vs. Strength Training (2012-2017)

Michael J. Fox Foundation: Effects of augmenting cholinergic function on gait and balance (2014-2017)

U.S. Army Medical Research Acquisition Activity: Assessment and Rehabilitation of Central Sensory Impairments for Balance in mTBI (2015-2019)

National Multiple Sclerosis Society: Identification of Gait and Balance Deficits in Patients with MS using Wireless Sesnors (2014-2017)


  • B.S., University of Wisconsin 1973
  • M.S., University of Minnesota 1977
  • Ph.D., University of Washington 1982


  • "Method to measure tone of axial and proximal muscle" Journal of visualized experiments : JoVE  2011
  • "Compensatory postural adaptations during continuous, variable amplitude perturbations reveal generalized rather than sequence-specific learning" Experimental Brain Research June 2008
  • "Upper limb joint angle tracking with inertial sensors." Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference  2011
  • "Linear and angular control of circular walking in healthy older adults and subjects with cerebellar ataxia" Experimental Brain Research May 2012
  • "Framework for understanding balance dysfunction in Parkinson's disease" Movement Disorders September 15 2013
  • "Objective biomarkers of balance and gait for Parkinson's disease using body-worn sensors" Movement Disorders September 15 2013
  • "Effects of a central cholinesterase inhibitor on reducing falls in Parkinson disease" Neurology October 5 2010
  • "Prediction and set-dependent scaling of early postural responses in cerebellar patients" Brain February 1997
  • "Postural muscle tone in the body axis of healthy humans" Journal of Neurophysiology November 2006
  • "Adaptation of postural control in normal and pathologic aging" Journal of Applied Biomechanics February 1999
  • "Interaction of posture and conscious perception of gravitational vertical and surface horizontal" Experimental Brain Research September 2007
  • "Axial hypertonicity in Parkinson's disease" Experimental Neurology November 2007
  • "Vestibular loss disrupts control of head and trunk on a sinusoidally moving platform" Journal of Vestibular Research: Equilibrium and Orientation  2001
  • "Do clinical scales of balance reflect turning abnormalities in people With Parkinson's disease?" Journal of Neurologic Physical Therapy March 2012
  • "A meta-regression of the long-term effects of deep brain stimulation on balance and gait in PD" Neurology October 5 2010
  • "The effect of deep brain stimulation randomized by site on balance in Parkinson's disease" Movement Disorders  2014
  • "Introduction to special issue on vestibular control of posture and gait" Journal of Vestibular Research: Equilibrium and Orientation March 1993
  • "The relationship between balance control and vitamin D in Parkinson's disease-a pilot study" Movement Disorders July 2013
  • "Postural sway as a marker of progression in Parkinson's disease" Gait and Posture July 2012
  • "Postural ataxia related to somatosensory loss." Advances in neurology  2001
  • "Turn detection and characterization with inertial sensors"   2013
  • "The effect of prior leaning on human postural responses" Gait and Posture  1993
  • "Postural feedback responses scale with biomechanical constraints in human standing" Experimental Brain Research February 2004
  • "Vestibular stimulation affects medium latency postural muscle responses" Experimental Brain Research  2002
  • "Levodopa Is a Double-Edged Sword for Balance and Gait in People With Parkinson's Disease" Movement Disorders September 1 2015
  • "Accelerometry reveals differences in gait variability between patients with multiple sclerosis and healthy controls" Annals of Biomedical Engineering August 2013
  • "Exploring outcome measures for exercise intervention in people with Parkinson's disease" Parkinson's Disease  2013
  • "Changes in the activity of the cerebral cortex relate to postural response modification when warned of a perturbation" Clinical Neurophysiology June 2008
  • "Effects of Parkinson's disease and levodopa on functional limits of stability" Clinical Biomechanics May 2008
  • "A critical examination of vestibular function in motor-impaired learning-disabled children" International Journal of Pediatric Otorhinolaryngology  1987

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