The use of intermuscular coherence analysis as a novel approach to detect age-related changes on postural muscle synergy
| Autor: | Alessander Danna-Dos-Santos, Charles T. Leonard, Adriana M. Degani |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Adult
Male medicine.medical_specialty Population Posture Low frequency band Biceps 050105 experimental psychology 03 medical and health sciences 0302 clinical medicine Physical medicine and rehabilitation Age related Medicine Humans 0501 psychology and cognitive sciences Muscle synergy education Muscle Skeletal Postural Balance Balance (ability) Aged education.field_of_study business.industry Electromyography General Neuroscience 05 social sciences Age Factors Coherence (statistics) Coherence analysis Physical therapy Female business 030217 neurology & neurosurgery |
| Zdroj: | Neuroscience letters. 656 |
| ISSN: | 1872-7972 |
| Popis: | The overall goal of this study was to investigate potential adaptations brought about by the natural processes of aging on the coordination of postural muscles. Considering the progressive and non-homogeneous deterioration of sensorimotor and neuromuscular systems as the individual grows older, it was hypothesized that aging is associated with a reorganization of synergistic mechanisms controlling postural muscles. Therefore, the presence, distribution, and strength of correlated neural inputs to three posterior postural muscles were measured by intermuscular coherence estimations at a low frequency band (0–55 Hz). Nine healthy young adults and thirteen healthy older adults performed ten trials of a perturbed task: bipedal stance while holding a five kg load for fifteen seconds. Estimates of intermuscular coherence for each pair of electromyographic signals (soleus and biceps femoris, soleus and erector spinae, and biceps femoris and erector spinae) were computed. Results revealed significantly stronger levels of synchronization of posterior muscles within 0–10 Hz in seniors compared to young adults. In addition, seniors presented similar spectra of intermuscular coherence within 0–55 Hz for all three muscle pairs analyzed. These findings provide valuable information regarding compensatory mechanisms adopted by older adults to control balance. The age-related reorganization of neural drive controlling posterior postural muscles revealing a stronger synchronization within 0–10 Hz might be related to the faster body sway and muscle co-activation patterns usually observed in this population. Finally, this study supports the use of Intermuscular Coherence Analysis as a sensitive method to detect age-related changes in multi-muscle control. |
| Databáze: | OpenAIRE |
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