| Autor: |
P., Saha, R., Pathak, P., Chatterjee, A., Bandyopadhyay |
| Zdroj: |
Progress in Health Sciences; 2023, Vol. 13 Issue 1, p16-23, 8p |
| Abstrakt: |
Purpose: The involvement of motor units during their activities in primary and secondary muscles rapidly becomes prominent as a diagnostic tool for pathological conditions. But no research has been published so far indicating the involvement of motor units during physiological circumstances like Eupnea, Bradypnea, and Tachypnea. These findings would help to determine the neuromuscular mechanism of respiratory mechanics in physiological situations and to compare it with clinical conditions related to respiratory muscles. Aim of the study: The experimental findings would help to determine the neuromuscular mechanism of respiratory mechanics in physiological situations and to compare it with clinical conditions related to respiratory muscles. Materials and Methods: Thirty healthy sedentary adult females participated in this investigation. The Tachypnea and Bradypnea were deliberately achieved by asking them to hyperventilate with shallow breaths and to hold their breath for a period in a supine posture accordingly. The participation of motor units and force generated in the diaphragm and intercostal muscles were assessed by surface electromyography (sEMG). Results: The motor unit activities for three various situations such as silent breathing reduced breathing, and fast breathing rates significantly vary with each other in both the primary respiratory muscles (p<0.05). But there was insignificant variation in motor unit discharges between Eupnea and bradypnea of both muscles. Conclusions: In supine posture during Tachypnea, the quick and enhanced expansion of the thoracic cavity requires more motor unit activation in the diaphragm and intercostal muscle thus suggesting higher involvement. In Eupnea and Bradypnea virtually equal participation of both muscles was discovered. The modest increase in intercostal motor unit discharge in bradypnea than Eupnea might be owing to the larger extension of the intercostal muscle during bradypnea than the diaphragm does. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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