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Updated: Jan 2, 2026
09:24
Repeated Measurement of Respiratory Muscle Activity and Ventilation in Mouse Models of Neuromuscular Disease
Published on: April 17, 2017
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Dynamic respiratory muscle function in late-onset Pompe disease
Barbara K Smith1,2, Shannon Allen3, Samantha Mays4
1Department of Physical Therapy, University of Florida, Gainesville, Florida, USA. bksmith@phhp.ufl.edu.
Scientific Reports
|December 14, 2019
Summary
Dynamic respiratory tests reveal distinct breathing compensations in late-onset Pompe disease (LOPD). These functional assessments, unlike static tests, highlight how neuromuscular function impacts breathing endurance and timing in LOPD patients.
Area of Science:
- Respiratory Physiology
- Neuromuscular Disorders
Background:
- Maximal inspiratory pressure (PIMAX) assesses inspiratory muscle strength in late-onset Pompe disease (LOPD).
- Static respiratory tests may not fully capture the complex adaptations in breathing mechanics due to muscle weakness.
Purpose of the Study:
- To investigate if dynamic respiratory muscle functional tests can identify unique ventilatory compensations in LOPD.
- To compare dynamic respiratory function between LOPD patients and healthy controls.
Main Methods:
- Evaluated LOPD (n=7) and healthy controls (n=7) using pulmonary function tests, inspiratory endurance testing, and dynamic kinematic MRI.
- Assessed ventilatory adjustments to single-breath inspiratory loads (inspiratory load compensation, ILC).
Main Results:
- LOPD patients exhibited significantly lower static and dynamic respiratory function.
- PIMAX, spirometry, endurance time, and maximal diaphragm descent were significantly correlated.
- In LOPD, responses to inspiratory loads correlated with chest wall kinematics, indicating preserved volume through altered timing and airflow.
Conclusions:
- Dynamic respiratory testing can detect changes in diaphragmatic motor function and strength in LOPD.
- Neuromuscular function significantly influences breathing endurance, timing, and loading compensations in LOPD.
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