Respiratory abdominal muscle recruitment and chest wall motion in myotonic muscular dystrophy
| Autor: | Eileen Hanafin Breslin, Viviane Ugalde, R. Ted Abresch, Sandra A. Walsh, H. William Bonekat |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Adult
Male medicine.medical_specialty Vital capacity Physiology Movement Electromyography Myotonia Work of breathing Airway resistance Physiology (medical) Internal medicine Abdomen Pressure Tidal Volume Respiratory muscle Humans Myotonic Dystrophy Medicine Lung Tidal volume Abdominal Muscles medicine.diagnostic_test business.industry Airway Resistance Respiration Stomach Anatomy Middle Aged Thorax Respiratory Muscles medicine.anatomical_structure Cardiology Breathing Female business |
| Zdroj: | Journal of Applied Physiology. 91:395-407 |
| ISSN: | 1522-1601 8750-7587 |
| DOI: | 10.1152/jappl.2001.91.1.395 |
| Popis: | Abdominal muscles are selectively active in normal subjects during stress and may increase the potential energy for inspiration by reducing the end-expiratory lung volume (EELV). We hypothesized that a similar process would occur in subjects with myotonic muscular dystrophy (MMD), but would be less effective, because of to their weakness and altered chest wall mechanics. Fine-wire electromyography (EMG) of the transversus abdominis (TA), internal oblique (IO), external oblique, and rectus abdominis was recorded in 10 MMD and 10 control subjects. EMG activity, respiratory inductive plethysmography, and gastric pressure were recorded during static pressure measurement and at increasing levels of inspiratory resistance breathing. EELV was reduced and chest wall motion was synchronous only in controls. Although the TA and IO were selectively recruited in both groups, EMG activity of the MMD group was twice that of controls at the same inspiratory pressure. In MMD subjects with mildly reduced forced vital capacity, significant differences can be seen in abdominal muscle recruitment, wall motion, work of breathing, and ventilatory parameters. |
| Databáze: | OpenAIRE |
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