Effect of Ankle Angles on the Soleus H-Reflex Excitability During Standing
| Autor: | Aiko K. Thompson, Richard L. Segal, Aviroop Dutt-Mazumder |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Adult
Male Soleus h reflex Central nervous system Physical Therapy Sports Therapy and Rehabilitation Body weight Article 050105 experimental psychology Plantar flexion H-Reflex 03 medical and health sciences 0302 clinical medicine Physiology (medical) Humans Medicine 0501 psychology and cognitive sciences business.industry 05 social sciences Spinal reflex Anatomy musculoskeletal system body regions Sensory input medicine.anatomical_structure Standing Position Reflex Female Neurology (clinical) Ankle business Ankle Joint 030217 neurology & neurosurgery |
| Zdroj: | Motor Control |
| ISSN: | 1543-2696 1087-1640 |
| DOI: | 10.1123/mc.2018-0118 |
| Popis: | This study investigated effects of ankle joint angle on the Hoffman’s reflex (H-reflex) excitability during loaded (weight borne with both legs) and unloaded (full body weight borne with the contralateral leg) standing in people without neurological injuries. Soleus H-reflex/M-wave recruitment curves were examined during upright standing on three different slopes that imposed plantar flexion (−15°), dorsiflexion (+15°), and neutral (0°) angles at the ankle, with the test leg loaded and unloaded. With the leg loaded and unloaded, maximum H-reflex/maximum M-wave ratio of −15° was significantly larger than those of 0° and +15° conditions. The maximum H-reflex/maximum M-wave ratios were 51%, 43%, and 41% with loaded and 56%, 46%, and 44% with unloaded for −15°, 0°, and +15° slope conditions, respectively. Thus, limb loading/unloading had limited impact on the extent of influence that ankle angles exert on the H-reflex excitability. This suggests that task-dependent central nervous system control of reflex excitability may regulate the influence of sensory input on the spinal reflex during standing. |
| Databáze: | OpenAIRE |
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