The relation of integrated EMG of the triceps brachii to force in rapid elbow extension.

Aoki, Fumi; Nagasaki, Hiroshi; Nakamura, Ryuichi

doi:10.1620/tjem.149.287

Cited by 7 publications

(6 citation statements)

References 8 publications

(9 reference statements)

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“…There is an approximately linear relationship between EMG and active isometric muscle force production (2,5,7,26,31), at least when the correct electromechanical delay is considered (8). Good correlations have been shown between EMG, intramuscular force and isometric force, for arm (33) and shoulder (31) muscles, but the EMG/force relationship is only linear for isometric contractions and depends on velocity, position, and on whether the contraction is eccentric or concentric (26).…”

Section: Introductionmentioning

confidence: 99%

Correspondence between laryngeal vocal fold movement and muscle activity during speech and nonspeech gestures

Poletto

Verdun

Strominger

et al. 2004

Journal of Applied Physiology

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To better understand the role of each of the laryngeal muscles in producing vocal fold movement, activation of these muscles was correlated with laryngeal movement during different tasks such as sniff, cough or throat clear, and speech syllable production. Four muscles (the posterior cricoarytenoid-PCA, lateral cricoarytenoid-LCA, cricothyroid-CT and thyroarytenoid-TA) were recorded with bipolar hooked wire electrodes placed bilaterally in four normal subjects. A nasoendoscope was used to record vocal fold movement while simultaneously recording muscle activity. Muscle activation level was correlated with ipsilateral vocal fold angle for vocal fold opening and closing. Pearson correlation coefficients and their statistical significance were computed for each trial. Significant effects of muscle (p≤0.0005) and task (p=0.034) were found on the r (transformed to Fisher's Z') values. All the PCA recordings related significantly with vocal opening while CT activity was significantly correlated with opening only during sniff. The TA and LCA activities were significantly correlated with vocal fold closing during cough. During speech, the CT and TA activity correlated with both opening and closing. Laryngeal muscle patterning to produce vocal fold movement differed across tasks; reciprocal muscle activity only occurred on cough while speech and sniff often involved simultaneous contraction of muscle antagonists. In conclusion, different combinations of muscle activation are used for biomechanical control of vocal fold opening and closing movements during respiratory, airway protection and speech tasks.

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Section: Introductionmentioning

confidence: 99%

Correspondence between laryngeal vocal fold movement and muscle activity during speech and nonspeech gestures

Poletto

Verdun

Strominger

et al. 2004

Journal of Applied Physiology

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show abstract

“…Assessing the EMG-force relationship during dynamic muscle contractions is more challenging due to numerous physiological and non-physiological factors (Farina, 2006). Despite these issues, linear relationships between peak velocity and acceleration with the EMG amplitude of the elbow extensors during a ballistic elbow extension has been shown (Aoki, Nagasaki & Nakamura, 1986) with similar results reported in the elbow flexors (Barnes, 1980).…”

Section: Introductionmentioning

confidence: 75%

Changes in muscle activity during the flexion and extension phases of arm cycling as an effect of power output are muscle-specific

Chaytor

Forman

Byrne

et al. 2020

PeerJ

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Arm cycling is commonly used in rehabilitation settings for individuals with motor impairments in an attempt to facilitate neural plasticity, potentially leading to enhanced motor function in the affected limb(s). Studies examining the neural control of arm cycling, however, typically cycle using a set cadence and power output. Given the importance of motor output intensity, typically represented by the amplitude of electromyographic (EMG) activity, on neural excitability, surprisingly little is known about how arm muscle activity is modulated using relative workloads. Thus, the objective of this study was to characterize arm muscle activity during arm cycling at different relative workloads. Participants (n = 11) first completed a 10-second maximal arm ergometry sprint to determine peak power output (PPO) followed by 11 randomized trials of 20-second arm cycling bouts ranging from 5–50% of PPO (5% increments) and a standard 25 W workload. All submaximal trials were completed at 60 rpm. Integrated EMG amplitude (iEMG) was assessed from the biceps brachii, brachioradialis, triceps brachii, flexor carpi radialis, extensor carpi radialis and anterior deltoid of the dominant arm. Arm cycling was separated into two phases, flexion and extension, relative to the elbow joint for all comparisons. As expected, iEMG amplitude increased during both phases of cycling for all muscles examined. With the exception of the triceps brachii and extensor carpi radialis, iEMG amplitudes differed between the flexion and extension phases. Finally, there was a linear relationship between iEMG amplitude and the %PPO for all muscles during both elbow flexion and extension.

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“…Assessing the EMG-force relationship during dynamic muscle contractions is more challenging due to numerous physiological and non-physiological factors (Farina 2006). Despite these issues, linear relationships between peak velocity and acceleration with the EMG amplitude of the elbow extensors during a ballistic elbow extension has been shown (Aoki et al 1986) with similar results reported in the elbow flexors (Barnes 1980).…”

Section: Introductionmentioning

confidence: 89%

Peer Review #1 of "Changes in muscle activity during the flexion and extension phases of arm cycling as an effect of power output are muscle-specific (v0.1)"

Pearcey¹

2020

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Arm cycling is commonly used in rehabilitation settings for individuals with motor impairments in an attempt to facilitate neural plasticity, potentially leading to enhanced motor function in the affected limb(s). Studies examining the neural control of arm cycling, however, typically cycle using a set cadence and power output. Given the importance of motor output intensity, typically represented by the amplitude of electromyographic (EMG) activity, on neural excitability, surprisingly little is known about how arm muscle activity is modulated using relative workloads. Thus, the objective of this study was to characterize arm muscle activity during arm cycling at different relative workloads. Participants (n=11) first completed a 10-second maximal arm ergometry sprint to determine peak power output (PPO) followed by 11 randomized trials of 20-second arm cycling bouts ranging from 5-50% of PPO (5% increments) and a standard 25W workload. All submaximal trials were completed at 60 rpm. Integrated EMG amplitude (iEMG) was assessed from the biceps brachii, brachioradialis, triceps brachii, flexor carpi radialis, extensor carpi radialis and anterior deltoid of the dominant arm. Arm cycling was separated into two phases, flexion and extension, relative to the elbow joint for all comparisons. As expected, iEMG amplitude increased during both phases of cycling for all muscles examined. With the exception of the triceps brachii and extensor carpi radialis, iEMG amplitudes differed between the flexion and extension phases. Finally, there was a linear relationship between iEMG amplitude and the %PPO for all muscles during both elbow flexion and extension.

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The relation of integrated EMG of the triceps brachii to force in rapid elbow extension.

Cited by 7 publications

References 8 publications

Correspondence between laryngeal vocal fold movement and muscle activity during speech and nonspeech gestures

Correspondence between laryngeal vocal fold movement and muscle activity during speech and nonspeech gestures

Changes in muscle activity during the flexion and extension phases of arm cycling as an effect of power output are muscle-specific

Peer Review #1 of "Changes in muscle activity during the flexion and extension phases of arm cycling as an effect of power output are muscle-specific (v0.1)"

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