The long-term goal of this research is to understand the neurophysiological basis for central and peripheral neurological disorders of postural control in order to provide a scientific basis for the evaluation and rehabilitation of balance disorders in the elderly. The first specific aim is to investigate the extent to which compensatory stepping is controlled in a similar way to step initiation by (1) testing the hypothesis that disorders of voluntary step initiation in 10 Parkinson's patients, 10 healthy young and 10 healthy elderly controls are similar to other disorders in stepping for balance correction (Experiment 1), and (2) determining the effect that a cognitive task has on voluntary step initiation, compensatory stepping, and feet in-place responses in 10 Parkinson patients ON and OFF levodopa and 10 healthy elderly controls (Experiment 2).
The second aim i nvestigates the effects of foot placement in stance on postural stability to perturbations in multiple directions. The hypothesis will be tested that 10 Parkinson, 10 cerebellar and 20 healthy elderly controls will not differ in their responses to such perturbations when standing with narrow, wide and diagonal foot placements (Experiment 3). Finally, the third aim is to determine how a cane is used for stability in stance and during surface perturbations. The hypothesis will be tested that a cane can be used to stabilize sway in stance, to modify and trigger automatic postural responses in patients with 10 peripheral neuropathy patients and up to 30 healthy controls, but not in 10 Parkinson's patients (Experiment 4). A better understanding of adaptive postural behaviors such as protective stepping, alterations in foot placement in stance, and use of a cane will provide the scientific rationale for improving balance retraining programs for both neurological patients and for elderly with subclinical disorders affecting balance.

Agency
National Institute of Health (NIH)
Institute
National Institute on Aging (NIA)
Type
Research Project (R01)
Project #
5R01AG006457-17
Application #
6509512
Study Section
Geriatrics and Rehabilitation Medicine (GRM)
Program Officer
Yancik, Rosemary
Project Start
1989-09-30
Project End
2004-03-31
Budget Start
2002-04-01
Budget End
2003-03-31
Support Year
17
Fiscal Year
2002
Total Cost
$476,351
Indirect Cost
Name
Oregon Health and Science University
Department
Type
Schools of Medicine
DUNS #
009584210
City
Portland
State
OR
Country
United States
Zip Code
97239
Cruz, Caio Ferraz; Piemonte, Maria Elisa Pimentel; Okai-Nobrega, Líria Akie et al. (2018) Parkinson's disease does not alter automatic visual-motor coupling in postural control. Neurosci Lett 686:47-52
Huisinga, Jessie; Mancini, Martina; Veys, Chris et al. (2018) Coherence analysis of trunk and leg acceleration reveals altered postural sway strategy during standing in persons with multiple sclerosis. Hum Mov Sci 58:330-336
St George, R J; Gurfinkel, V S; Kraakevik, J et al. (2018) Case Studies in Neuroscience: A dissociation of balance and posture demonstrated by camptocormia. J Neurophysiol 119:33-38
Freeman, Lynn; Gera, Geetanjali; Horak, Fay B et al. (2018) Instrumented Test of Sensory Integration for Balance: A Validation Study. J Geriatr Phys Ther 41:77-84
Gilat, Moran; Ehgoetz Martens, Kaylena A; Miranda-Domínguez, Oscar et al. (2018) Dysfunctional Limbic Circuitry Underlying Freezing of Gait in Parkinson's Disease. Neuroscience 374:119-132
Bonora, Gianluca; Mancini, Martina; Carpinella, Ilaria et al. (2017) Investigation of Anticipatory Postural Adjustments during One-Leg Stance Using Inertial Sensors: Evidence from Subjects with Parkinsonism. Front Neurol 8:361
Van Ooteghem, Karen; Frank, James S; Horak, Fay B (2017) Postural motor learning in Parkinson's disease: The effect of practice on continuous compensatory postural regulation. Gait Posture 57:299-304
Mancini, Martina; Smulders, Katrijn; Cohen, Rajal G et al. (2017) The clinical significance of freezing while turning in Parkinson's disease. Neuroscience 343:222-228
Schlenstedt, Christian; Mancini, Martina; Horak, Fay et al. (2017) Anticipatory Postural Adjustment During Self-Initiated, Cued, and Compensatory Stepping in Healthy Older Adults and Patients With Parkinson Disease. Arch Phys Med Rehabil 98:1316-1324.e1
Dale, Marian L; Horak, Fay B; Wright, W Geoffrey et al. (2017) Impaired perception of surface tilt in progressive supranuclear palsy. PLoS One 12:e0173351

Showing the most recent 10 out of 149 publications