Effect of force magnitude of touch on the components of postural sway
| Autor: | Janina Manzieri Prado-Rico, Ariani Cardoso Sodré, Sandra Maria Sbeghen Ferreira de Freitas, Rafaela Barroso de Souza Costa Garbus, Sandra Regina Alouche |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Adult
Male 030506 rehabilitation medicine.medical_specialty Posture Biophysics Somatosensory system Postural control Fingers Young Adult 03 medical and health sciences 0302 clinical medicine Physical medicine and rehabilitation Center of pressure (terrestrial locomotion) Feedback Sensory Pressure medicine Neural control Humans Orthopedics and Sports Medicine Force platform Postural Balance Foot Rehabilitation Index finger medicine.anatomical_structure Touch Standing Position Closed eyes Force magnitude Female 0305 other medical science Psychology 030217 neurology & neurosurgery |
| Zdroj: | Gait & Posture. 65:15-19 |
| ISSN: | 0966-6362 |
| DOI: | 10.1016/j.gaitpost.2018.06.164 |
| Popis: | Background Lightly touching the tip of the index finger on an external surface reduces the postural sway during upright standing due to the additional somatosensory information provided by the touch to the postural control system. But when the individuals apply more force, it provides more mechanical support. However, because most of the studies investigated only two levels of force, whether the control mechanisms of postural sway are affected by the different force levels was unknown. Research question To examine the influence of the magnitude of force (up to 1, 2, 4, 6 or 8 N) applied to the touch bar on the mechanisms used to control the postural sway during quiet standing with eyes open or closed. Methods Ten young right-handed adults stood for 35 s on a force platform, with feet apart, while touched a rigid bar with different force levels with eyes open or closed. The amplitude and velocity of the center of pressure and its components, Rambling and Trembling trajectories, respectively, related to more supraspinal and spinal control mechanisms, were assessed. Results The touch reduced all trajectories, mainly of the Rambling component and with closed eyes. There was a floor effect of the touch force as amplitudes and velocities were minimal at 4 N of force. Significance The component of postural sway under the supraspinal neural control is more affected by different force magnitudes applied to the touch bar. |
| Databáze: | OpenAIRE |
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