Chest wall configuration in supine man: Wakefulness and sleep☆
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Cited by (18)
Domiciliary noninvasive ventilation for chronic respiratory diseases
2022, Medical Journal Armed Forces IndiaCitation Excerpt :The reduction on capacity can be due to intrinsic weakness of respiratory muscles like in neuromuscular diseases or can be acquired due to mechanical disadvantage from chest wall deformity or due to COPD-related hyperinflation. Increased load can be due to airway obstruction, reduced lung compliance due to loss of lung elasticity and reduced chest wall compliance.2–7 The dysfunction of load, drive and capacity in various chronic lung diseases is elaborated in Table 1.
Respiratory sinus arrhythmia during a mental attention task: the role of breathing-specific heart rate
2020, Respiratory Physiology and NeurobiologyCitation Excerpt :These transducers, which respond linearly to changes in length, recorded the breathing-related ribcage and abdomen movements (Fig. 1, channels 1 and 2). In the supine position the chest wall moves as if comprising two compartments (rib cage and abdomen) arranged in series, with minimal distortion (Mortola and Anch, 1978). Therefore, at any lung volume the volumetric decrease of one corresponds to the expansion of the other compartment and the sum of rib cage and abdomen linear expansions is an excellent approximation of tidal volume (Konno and Mead, 1967; Mead et al., 1967) (channel 6).
Thoracoabdominal asynchrony and paradoxical motion in middle stage amyotrophic lateral sclerosis
2019, Respiratory Physiology and NeurobiologyCitation Excerpt :Firstly, the sample size was small and TAA was only assessed at 45° trunk inclination. It is known that the supine position by itself has an effect on breathing mechanics (i.e. weight of abdominal content upon the diaphragm that increases intra-abdominal pressure and lengthens the diaphragm’s fibers, thereby modifying the ability to generate a given trans-diaphragmatic pressure, limiting the costal movement during inspiration due to the weight of the thorax, changes in inspiratory muscle action distribution and mechanics with muscles of the ribcage acting mainly on its lateral sides) (Mortola and Anch, 1978; Vellody et al., 1978; Ibanez and Raurich, 1982; Vilke et al., 2000), thus the effects of other postures on TAA during coughing need to be properly addressed in future studies. Secondly, OEP data were not acquired during the MIP, MEP and SNIP measurements.
Thinking about breathing: Effects on respiratory sinus arrhythmia
2016, Respiratory Physiology and NeurobiologyCitation Excerpt :In supine men (and presumably in women) during breathing the chest wall moves with one degree of freedom, so that at any fixed lung volume the expansion of rc is accompanied by a volume-equivalent decrease in abd, and vice versa. Because the distortion between the two compartments is minimal (Mortola and Anch, 1978), chest wall (cw) motion is the algebraic sum of rc and abd and a proxy for tidal volume. Although it is possible to calibrate cw displacement into lung volume units (Konno and Mead, 1967; Mead et al., 1967), this was unnecessary for the purpose of the current study, and cw motion is presented in arbitrary units.
Normal Physiology of the Upper and Lower Airways
2010, Principles and Practice of Sleep Medicine: Fifth EditionRespiratory Physiology: Understanding the Control of Ventilation
2010, Principles and Practice of Sleep Medicine: Fifth Edition
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This work was supported in part by N.I.H. grant HL-20122 and training grant HL-072717.