| Title: | Acute effects of orofacial, neck, and shoulder relaxation exercises and chewing on soleus H-reflex and motor unit discharge patterns |
|---|
| Authors: | ID Magdič, Marša (Author)
ID Holobar, Aleš (Author)
ID Kramberger, Matej (Author)
ID Vogrin, Matjaž (Author)
ID Murks, Nina (Author)
ID Fekonja, Anita (Author)
ID Kalc, Miloš (Author) |
|---|
| Files: |  PDF - Presentation file, download (3,20 MB)
MD5: A325403BE3FC8A17DFFA079413FF4F28
 URL - Source URL, visit https://journals.physiology.org/doi/epdf/10.1152/jn.00461.2024
|
|---|
| Language: | English |
|---|
| Typology: | 1.01 - Original Scientific Article |
|---|
| Organization: |  ZRS Koper - Science and Research Centre Koper
|
|---|
| Abstract: | The interconnected nature of orofacial, neck musculature, and the neural system suggests that localised19activities, such as teeth clenching, can influence remote spinal excitability. While stretching exercises are20known to have both local and remote effects, the specific impact of orofacial muscle stretching remains21underexplored. This study investigates the effects of two interventions: 25 guided orofacial and neck22stretching and mobility exercises (Exercises), and chewing six chewing gums for six minutes (Chewing),23on the soleus H-reflex and D1 presynaptic inhibition. Ten volunteers (mean age: 28.75 ± 9 years)24participated, with H-reflex measurements collected using high-density electromyography (HDsEMG)25before and after each intervention. Latency (HLAT ), duration (H DUR ), peak-to-peak (H P2P, D1 PSP ) and positive26peak (H POS ) amplitudes were extracted from unconditioned and conditioned H-reflexes. The ratio27(D1 P2P/H P2P) between conditioned (D1 P2P ) and unconditioned (H P2P ) H-reflex was calculated to study the28D1 presynaptic inhibition mechanisms. Additionally, 8,400 firings from 376 distinct motor units (MUs),29categorised by firing threshold were analysed for latency, firing ratio, and inhibition probability (D1 PROB ).30HP2P, HPOS decreased and HDUR was significantly increased after the Exercise intervention, while the31Chewing intervention had no effect on these parameters. The D1 P2P/H P2P ratio and D1 PROB remained32unchanged, suggesting that the observed drop in H P2P is not mediated by presynaptic inhibition33mechanisms. Single MU analysis confirmed the H-reflex findings. The results of this study suggest that34stretching and mobility exercises targeting the neck and orofacial region can reduce neuromuscular35excitability, offering potential for non-pharmacological management of conditions associated with36motoneuron hyperexcitability and general whole-body relaxation |
|---|
| Keywords: | high-density electromyography (HDsEMG), remote effect, stretching |
|---|
| Publication status: | Published |
|---|
| Publication version: | Version of Record |
|---|
| Publication date: | 01.01.2025 |
|---|
| Year of publishing: | 2025 |
|---|
| Number of pages: | str. 1886-1901 |
|---|
| Numbering: | Vol. , iss. |
|---|
| PID: | 20.500.12556/DiRROS-23859  |
|---|
| UDC: | 616.8 |
|---|
| ISSN on article: | 0022-3077 |
|---|
| DOI: | 10.1152/jn.00461.2024 |
|---|
| COBISS.SI-ID: | 234926083 |
|---|
| Copyright: | © 2025 The Authors. |
|---|
| Note: | Soavtorji: Aleš Holobar, Matej Kramberger, Matjaž Vogrin, Nina Murks, Anita Fekonja, Miloš Kalc;
|
|---|
| Publication date in DiRROS: | 13.10.2025 |
|---|
| Views: | 185 |
|---|
| Downloads: | 82 |
|---|
| Metadata: |    |
|---|
|
:
|
Copy citation |
|---|
| | | | Share: |  |
|---|
Hover the mouse pointer over a document title to show the abstract or click
on the title to get all document metadata. |
