نتایج جستجو برای: electrical activity of diaphragm
تعداد نتایج: 21248340 فیلتر نتایج به سال:
The effect of different L-phenylalanine (Phe) concentrations (0.24-12.1 mM), on acetylcholinesterase (AChE) and Na+,K(+)-ATPase activities of diaphragm homogenates from 21-day old rats and pure enzymes, was investigated at 37 degrees C. AChE and Na+,K(+)-ATPase activities were determined after preincubation with Phe. AChE activity in diaphragm homogenate or in pure eel E. electricus enzyme show...
seismic retrofit of masonry slabs in existing steel or masonry buildings has found special significance in current codes as failure of unstable jack arch slabs has been reported as a major reason for collapsing structures in middle east deadly earthquakes. in this paper, three retrofit schemes are investigated and compared. the proposed rehabilitation techniques consist of a single x strapping,...
Background and Objective: Due to the disruption of the body’s natural posture because of the loss of interior arch of the foot in people with foot pronation, which may change amount and direction of forces and muscles electrical activity exerted on the foot during running movement, the purpose of this study was to compare ground reaction forces and muscles electrical activity of the ankle...
AIM To compare electromyographic (EMG) activity in young-adult subjects with different breathing types. METHODOLOGY This study included 50 healthy male subjects with complete natural dentition, and no history of orofacial pain or craniomandibular-cervical-spinal disorders. Subjects were classified into two groups: upper costal breathing type, and costo-diaphragmatic breathing. Bipolar surface...
We hypothesized that patients who fail weaning from mechanical ventilation recruit their inspiratory rib cage muscles sooner than they recruit their expiratory muscles, and that rib cage muscle recruitment is accompanied by recruitment of sternomastoid muscles. Accordingly, we measured sternomastoid electrical activity and changes in esophageal (DeltaPes) and gastric pressure (DeltaPga) in 11 w...
High cervical spinal cord injuries lead to permanent respiratory deficits. One preclinical model of respiratory insufficiency in adult rats is the C2 partial injury which causes unilateral diaphragm paralysis. This model allows the investigation of a particular population of respiratory bulbospinal axons which cross the midline at C3-C6 spinal segment, namely the crossed phrenic pathway. Transc...
Background: The diaphragm is the main respiratory muscle; the diaphragm can rupture in the field of blunt trauma, penetrating trauma or occur following medical procedures. Approximately 0.8 to 1.6% of patients with blunt trauma are suspected to have a rupture of the diaphragm. As diaphragmatic rupture is a rare clinical condition, so it may be undiagnosed and associated with complications and h...
The effect of propranolol on the electric stimulation of rat isolated diaphragm shOwed the depression of its isometric force of contraction. This depressant effect of propranolol on the rat isolated diaphragm was produced in doses much higher than the doses required for the beta adrenergic receptor blocking activity. Isoprenaline showed no effect on the rat isolated diaphragm and it did not ant...
Methods Patients requiring invasive mechanical ventilation due to sepsis, ARDS, or severe acute brain injury were enrolled within 24 hours of intubation. Airway pressure, flow, crural diaphragm EMG activity (Edi) and transdiaphragmatic pressure (Pdi) were recorded for 5 minutes of every hour for up to 7 days. To assess for changes in diaphragm function, neuromechanical efficiency (NME ratio of ...
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