Abstract
We investigated the effects of vertical vibration and compressive load on soleus H-reflex amplitude and postactivation depression. We hypothesized that, in the presence of a compressive load, limb vibration induces a longer suppression of soleus H-reflex. Eleven healthy adults received vibratory stimulation at a fixed frequency (30 Hz) over two loading conditions (0% and 50% of individual's body weight). H-reflex amplitude was depressed ∼88% in both conditions during vibration. Cyclic application of compression after cessation of the vibration caused a persistent reduction in H-reflex excitability and postactivation depression for > 2.5 min. A combination of limb segment vibration and compression may offer a nonpharmacologic method to modulate spinal reflex excitability in people after CNS injury.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 631-642 |
| Number of pages | 12 |
| Journal | Journal of Motor Behavior |
| Volume | 50 |
| Issue number | 6 |
| DOIs | |
| State | Published - Nov 2 2018 |
| Externally published | Yes |
Keywords
- compressive load
- mechanical oscillation
- postactivation depression
- spinal cord injury
ASJC Scopus subject areas
- Biophysics
- Orthopedics and Sports Medicine
- Experimental and Cognitive Psychology
- Cognitive Neuroscience