High‐density surface electromyography: A visualization method of laryngeal muscle activity

Bracken, David; Ornelas, Gladys; Coleman, Todd P.; Weissbrod, Philip A.

doi:10.1002/lary.27784

Cited by 16 publications

(14 citation statements)

References 43 publications

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“…All results were expressed as mean ± SE; P>0.05 shows no significant difference, P<0.05 shows a significant difference, and P<0.01 shows that the difference was extremely significant. All the graphs were formed using the Graph-pad Prism (Version 7.04, Graph Pad Software Inc., San Diego, CA) (30).…”

Section: Discussionmentioning

confidence: 99%

The role of DMSO and MSM in treatment of tendinopathies affection in equine: A comparative study

Akbar¹,

Ahmad²,

Hayat³

et al. 2022

IJVS

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Superficial digital flexor tendon (SDFT) injury is a main cause of lameness in polo and racehorses inciting long-term lameness and recovery. This study aimed to compare the efficacy of topical dimethyl sulfoxide (DMSO) and Methylsulfonylmethane (MSM) on bowed tendons in horses. Ten client-owned injured horses, aged between 5-15 years with an average age of 8.5 years and weighing approximately 400-500 kg, suffering from chronic tendinitis were selected and allocated into two groups: group A (DMSO) and group B (MSM). The group A animals (n=5) were treated with 60 mL of topical 90% DMSO aqueous solution, while Group B animals (n=5) received 60 mL of topical 90% MSM aqueous solution on the bowed tendon at days 0, 7, 14, 21, 28, 35, and day 42. Clinical examinations were performed to evaluate the severity of pain and lameness grade. Ultrasound scans of the superficial digital flexor tendon were taken at days 0, 21, and day 42. Images were placed in numerical form, and the fiber alignment score of the fibers (FS) and the echogenicity score (ES) of the superficial digital flexor tendon at the maximum injury zone (MIZ) were recorded. Results showed that pain reduction and lameness significantly (P<0.05) reduced from 21d to 42d in the DMSO animals compared with the MSM animals. The echogenicity score didn't differ between the two groups at 0d, 21d, and 42d (P>0.05) however, it was significantly declined in group A at 42d than 0d (P<0.05). Fiber alignment in group A was (P<0.01) reduced at 42d compared with group B. This study concluded that group A horses showed very effective and long-term improvements compared to the group B horses.

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Section: Discussionmentioning

confidence: 99%

The role of DMSO and MSM in treatment of tendinopathies affection in equine: A comparative study

Akbar¹,

Ahmad²,

Hayat³

et al. 2022

IJVS

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“…In this regard, a series of sequential energy maps constructed from HD sEMG recordings could be utilized to evaluate the muscular activities of the frontal neck while phonating vowel [a:] in our pilot studies (Zhu et al, 2017a(Zhu et al, , 2018a. Afterward, Bracken et al utilized a 20-channel array of HD sEMG signals located around the anterior neck to evaluate the muscular activities when phonating in three manners (rest, low, and high pitches) (Bracken et al, 2019). Nevertheless, these studies only focused on myoelectric characteristics of the neck muscles without simultaneously considering the properties of speech signals that are commonly applied in clinical settings, and therefore, the interrelations between the speech signals and the sEMG recordings during pitch-related phonation have rarely been investigated.…”

Section: Introductionmentioning

confidence: 99%

Towards Evaluating Pitch-Related Phonation Function in Speech Communication Using High-Density Surface Electromyography

et al. 2022

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Pitch, as a sensation of the sound frequency, is a crucial attribute toward constructing a natural voice for communication. Producing intelligible sounds with normal pitches depend on substantive interdependencies among facial and neck muscles. Clarifying the interrelations between the pitches and the corresponding muscular activities would be helpful for evaluating the pitch-related phonating functions, which would play a significant role both in training pronunciation and in assessing dysphonia. In this study, the speech signals and the high-density surface electromyography (HD sEMG) signals were synchronously acquired when phonating [a:], [i:], and [ә:] vowels with increasing pitches, respectively. The HD sEMG energy maps were constructed based on the root mean square values to visualize spatiotemporal characteristics of facial and neck muscle activities. Normalized median frequency (nMF) and root-mean square (nRMS) were correspondingly extracted from the speech and sEMG recordings to quantitatively investigate the correlations between sound frequencies and myoelectric characteristics. The results showed that the frame-wise energy maps built from sEMG recordings presented that the muscle contraction strength increased monotonously across pitch-rising, with left-right symmetrical distribution for the face/neck. Furthermore, the nRMS increased at a similar rate to the nMF when there were rising pitches, and the two parameters had a significant correlation across different vowel tasks [(a:) (0.88 ± 0.04), (i:) (0.89 ± 0.04), and (ә:) (0.87 ± 0.05)]. These findings suggested the possibility of utilizing muscle contraction patterns as a reference for evaluating pitch-related phonation functions. The proposed method could open a new window for developing a clinical approach for assessing the muscular functions of dysphonia.

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“…As a result, many dry electrodes have been developed over the years including rigid boxes with metallic pads (e.g., Delsys Trigno Avanti wearable EMG system), metal films on plastics (4), carbon composites (5), and conductive fabrics (6). However, dry electrodes generally suffer from poor skin integration, low signalto-noise ratio (7), and small area coverage (8).…”

Section: Introductionmentioning

confidence: 99%

Electrically compensated, tattoo-like electrodes for epidermal electrophysiology at scale

et al. 2020

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Epidermal electrophysiology is widely carried out for disease diagnosis, performance monitoring, human-machine interaction, etc. Compared with thick, stiff, and irritating gel electrodes, emerging tattoo-like epidermal electrodes offer much better wearability and versatility. However, state-of-the-art tattoo-like electrodes are limited in size (e.g., centimeters) to perform electrophysiology at scale due to challenges including large-area fabrication, skin lamination, and electrical interference from long interconnects. Therefore, we report large-area, soft, breathable, substrate- and encapsulation-free electrodes designed into transformable filamentary serpentines that can be rapidly fabricated by cut-and-paste method. We propose a Cartan curve–inspired transfer process to minimize strain in the electrodes when laminated on nondevelopable skin surfaces. Unwanted signals picked up by the unencapsulated interconnects can be eliminated through a previously unexplored electrical compensation strategy. These tattoo-like electrodes can comfortably cover the whole chest, forearm, or neck for applications such as multichannel electrocardiography, sign language recognition, prosthetic control or mapping of neck activities.

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High‐density surface electromyography: A visualization method of laryngeal muscle activity

Cited by 16 publications

References 43 publications

The role of DMSO and MSM in treatment of tendinopathies affection in equine: A comparative study

The role of DMSO and MSM in treatment of tendinopathies affection in equine: A comparative study

Towards Evaluating Pitch-Related Phonation Function in Speech Communication Using High-Density Surface Electromyography

Electrically compensated, tattoo-like electrodes for epidermal electrophysiology at scale

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