geen, alle deelnemers zijn gezonde ouderen en jongeren. Echter, de helft van de geïncludeerde ouderen heeft een valhistorie, maar is wel gezond. Fall risk history of falls
Conditions
Interventions
None listed
Sponsors
Universiteit van Twente
Eligibility
Age
18 Years to 99 Years
Inclusion criteria
Inclusion criteria: - Elderly: Age 65 years and older o Elderly with history of falls: reporting at least one fall in the past year o Elderly without history of falls: reporting no fall in the past year - Healthy young: Age between 18 and 30 years - Ability to stand for at least 5 consecutive minutes - Able to walk independently or under supervision as indicated by a score of 4 on the Functional Ambulations Category (FAC) - Able to provide written informed consent
Exclusion criteria
Exclusion criteria: - Orthopaedic problems, including recent fractures which are currently not completely healed, history of hip or knee replacement, or limb amputation - Neurological disorders, including stroke, Parkinson*s disease and traumatic brain injury - Back pain: Participants with past or current back pain resulting from intervertebral disc herniation, spondylolisthesis/ spondylolistholysis or (osteoporotic) vertebral fracture will be excluded. Participants with a history of non-specific low back pain will be excluded if they currently experience pain - Visual impairments, including cataract. Participants who wear glasses or contact lenses to correct for myopia (short-sightedness) or hyperopia (far-sightedness) will not be excluded. - Inability to follow simple verbal instructions as indicated by a score
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| The main parameter to assess balance capacity is stepping threshold which is defined as the highest platform acceleration that can be overcome with a feet-in-place response. The main parameters to assess the sensorimotor mechanisms involved in balance control the frequency response functions, which quantify 1) the gain or magnitude of the response to the perturbation and 2) the phase lag between the response and the perturbation. | — |
Secondary
| Measure | Time frame |
|---|---|
| The secundary parameter to assess balance capacity is limit-of-stability which is defined as the highest platform acceleration that can be overcome with a maximum of one step. The secondary parameters to investigate sensorimotor mechanisms are obtained with a mathematical balance control model, which was developed at the University of Twente, en which will be fitted on the frequency response functions with optimization algorithms. The most important secondary parameters that will be estimated are: passive stiffness, passive damping, active stiffness, active damping, neural time delay and sensory reweighting factor for proprioceptive visual and vestibular information. | — |
Countries
Netherlands
Outcome results
None listed