Coordination of respiratory muscles assessed by means of nonlinear forecasting of demodulated myographic signals

Alonso, Joan Francesc; Mañanas, Miguel Ángel; Rojas, Mónica; Bruce, Eugene N.

doi:10.1016/j.jelekin.2011.07.004

Cited by 15 publications

(26 citation statements)

References 39 publications

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“…Ag-AgCl electrodes in bipolar configuration were placed on all subjects to record three respiratory muscles, diaphragm (Dia), intercostal (Int) and sternocleidomastoid (Strn). A pair of electrodes was used to record Dia, placed between the seventh and eighth intercostal spaces, located in the middle of the mid axillary line and the external clavicular line [26]. Electrodes placed in the second and third intercostal spaces, at the midclavicular line, were used to record Int [27], and electrodes between the mastoid process and mid-point of the muscle were used to record Strn [26].…”

Section: Respiratory and Surface Electromyography Signalsmentioning

confidence: 99%

Estimation of Work of Breathing from Respiratory Muscle Activity In Spontaneous Ventilation: A Pilot Study

Muñoz

Mañanas

2019

Applied Sciences

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Work of breathing (WOB) offers information that may be relevant to determine the patient’s status under spontaneous mechanical ventilation in Intensive Care Unit (ICU). Nowadays, the most reliable technique to measure WOB is based on the use of invasive catheters, but the use of qualitative observations such as the level of dyspnea is preferred as a possible indicator of WOB level. In this pilot study, the activity of three respiratory muscles were recorded on healthy subjects through surface electromyography while they were under non-invasive mechanical ventilation, using restrictive and obstructive maneuvers to obtain different WOB levels. The respiratory pattern between restrictive and obstructive maneuvers was classified with the Nearest Neighbor Algorithm with a 91% accuracy and a neural network model helped classify the samples into three WOB levels with a 89% accuracy, Low: [0.3–0.8) J/L, Medium: [0.8–1.3] J/L and Elevated: (1.3–1.8] J/L, demonstrating the relationship between the respiratory muscle activity and WOB. This technique is a promising tool for the healthcare staff in the decision-making process when selecting the best ventilation settings to maintain a low WOB. This study identified a model to estimate the WOB in different ventilatory patterns, being an alternative to invasive conventional techniques.

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Section: Respiratory and Surface Electromyography Signalsmentioning

confidence: 99%

Estimation of Work of Breathing from Respiratory Muscle Activity In Spontaneous Ventilation: A Pilot Study

Muñoz

Mañanas

2019

Applied Sciences

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“…Then, the signals were demodulated, that is, full-wave rectified and filtered by means of a 400 ms moving average window [7,10]. This demodulation integrated the contributions of all motor units, obtaining a signal related to the whole muscle action [11].…”

Section: B Data Preprocessingmentioning

confidence: 99%

“…This demodulation integrated the contributions of all motor units, obtaining a signal related to the whole muscle action [11]. The resulting demodulated EMG signals and the torque signal were resampled to obtain a final sampling frequency of 20 Hz [7]. Signals were also normalized by subtracting the mean and then dividing over their standard deviation to have zero mean and unit variance, so that subsequent analysis of their dynamics was independent from their amplitudes (see Fig.…”

Section: B Data Preprocessingmentioning

confidence: 99%

“…For details on the actual prediction algorithm, please refer to [7]. The values used for the parameters of the models and in the preprocessing of the signals were also chosen according to [7].…”

Section: Nonlinear Predictionmentioning

confidence: 99%

“…Particularly, our group has successfully applied nonlinear prediction based on locally-linear models to study muscle couplings and interactions between respiratory muscles [5]. Assuming that EMG data are associated with an underlying nonlinear dynamical system, it is possible to evaluate correlations between muscles using a simple nonlinear prediction algorithm as described in [7].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Analysis of muscle coupling during isokinetic endurance contractions by means of nonlinear prediction

Rojas-Martínez

Alonso

Chaler³

et al. 2013

2013 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)

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Isokinetic exercises have been extensively used in order to analyze muscle imbalances and changes associated with fatigue. It is known that such changes are difficult to assess from EMG signals during dynamic contractions, especially, using linear signal processing tools. The aim of this work was to use nonlinear prediction in order to analyze muscle couplings and interactions in this context and to assess the load-sharing of different muscles during fatigue. Results show promising for detecting interaction strategies between muscles and even for the interaction between muscles and the output torque during endurance tests.

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Effect of bite openings and mandibular protrusion on genioglossus muscle activity in healthy adults with oral appliance

et al. 2017

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Oral appliance (OA) can effectively treat obstructive sleep apnea; however, numerous types of oral appliances and designs are variable and the precise mechanisms behind differences in treatment outcomes are uncertain. The objective of this study was to evaluate the effects of different degrees of mandibular position [4° of bite openings (BO): 2, 4, 8 and 12 mm; and protrusion (P): 0, 50%, MAX], for both the upright and supine positions: BOP, BOP, BOP, BOP, BOP, BOP; with an OA on the: (1) activity of the genioglossus (GG) muscle by electromyogram, (2) inspiration by airflow sensor, and (3) recording mandibular movements (incisor and mandibular condyle point) in each position. Nine healthy male adults (age 27.5 ± 1.30 years) were recruited. The results show that GG muscle activity increased significantly from BO _P to BO_P during the supine position, and the strongest signal was found in BO_P, compared to all of the other positions, and GG muscle activity in BO_P tended to be lower. From supine to upright position the inspiration increased significantly but GG muscle activity did not. These results might be a stimulus to augment a compensatory mechanism of GG muscle induced by OA, however, mainly in protrusion position. The increase of BO (2-12 mm) and even maximum protrusion might not negatively affect the temporomandibular joint.

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Coordination of respiratory muscles assessed by means of nonlinear forecasting of demodulated myographic signals

Cited by 15 publications

References 39 publications

Estimation of Work of Breathing from Respiratory Muscle Activity In Spontaneous Ventilation: A Pilot Study

Estimation of Work of Breathing from Respiratory Muscle Activity In Spontaneous Ventilation: A Pilot Study

Analysis of muscle coupling during isokinetic endurance contractions by means of nonlinear prediction

Effect of bite openings and mandibular protrusion on genioglossus muscle activity in healthy adults with oral appliance

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