Differences in Medial and Lateral Gastrocnemius Stiffness after Exercise-Induced Muscle Fatigue

Lall, Prarthana Sanya; Alsubiheen, Abdulrahman M.; Aldaihan, Mishal M.; Lee, Haneul

doi:10.3390/ijerph192113891

Cited by 10 publications

(1 citation statement)

References 58 publications

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“…This would explain why it was more difficult to implant in the tibialis anterior than in the gastrocnemius muscles. It has been also experimentally determined that the stiffness of the gastrocnemius lateralis muscle is higher than that of gastrocnemius medialis muscle, explaining the reason why it was easier to implant the device in the gastrocnemius medialis muscle [36,37].…”

Section: Discussionmentioning

confidence: 99%

First-in-human demonstration of floating EMG sensors and stimulators wirelessly powered and operated by volume conduction

Becerra-Fajardo,

Minguillon,

Krob

et al. 2023

Preprint

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Background: Very recently we reported the design and evaluation of floating semi-implantable devices that receive power from and bidirectionally communicate with an external system using coupling by volume conduction. The proposed approach, of which the semi-implantable devices are proof-of-concept prototypes, may overcome some of the limitations presented by existing neuroprostheses, especially those related to the size of the implantable devices and the need to perform complex surgical procedures. This is accomplished as the implants do not require rigid and bulky components within them and can be developed as flexible threadlike devices, a form factor that is beneficial for motor neuroprostheses. Here we report the first-in-human demonstration of these semi-implantable devices for both electromyography (EMG) sensing and electrical stimulation in an acute study. Methods: A single floating device, consisting of implantable thin-film electrodes and a non implantable miniature electronic circuit connected to them, was deployed in the upper or lower limb of six healthy participants. Two external textile electrodes were strapped around the limb and were connected to the external system, which delivered high frequency current bursts. Within these bursts, 13 different commands were modulated to communicate with the wireless implant. In one participant, isometric forces were measured while acquiring EMG activity of voluntary muscle contractions using the semi-implantable device. Results: The floating EMG sensors and stimulators were successfully deployed in the biceps brachii and the gastrocnemius medialis muscles, and the external system was able to power them and bidirectionally communicate with them. Both sensing and stimulation parameters were configured externally using the communication protocol developed for the system. In one participant, both electrical stimulation and EMG acquisition assays were successfully performed, demonstrating the feasibility of the approach to power and communicate with the floating devices. Conclusions: This is the first time that floating EMG sensors and electrical stimulators that are powered and communicate by volume conduction are demonstrated in humans. These devices, which can be highly miniaturized using current microelectronic technologies, open the possibility of using coupling by volume conduction in networked neuroprosthetics, obtaining fully implantable wireless devices with sensing and stimulation capabilities.

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Section: Discussionmentioning

confidence: 99%

First-in-human demonstration of floating EMG sensors and stimulators wirelessly powered and operated by volume conduction

Becerra-Fajardo,

Minguillon,

Krob

et al. 2023

Preprint

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Efficacy of whole body vibration on fascicle length and joint angle in children with hemiplegic cerebral palsy

Ali,

Saleh,

Awad

2024

Physiotherapy Res Intl

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Background and ObjectiveEnhancing joint range of motion is regarded as one of the most long‐term goals in the management of cerebral palsy (CP). With CP, there are well‐documented changes in the neurological drive to skeletal muscle, which leads to modifications in the architecture of the muscles. Whole‐body vibration (WBV) is one intervention to modify muscle and joint. However, its efficacy needs to be accurately studied. This study investigates the effects of WBV on fascicle length, knee joint angle and function in children with spastic hemiplegic CP.MethodsEighty children with hemiplegic CP aged 4–6 years were enrolled. Participants were randomly divided into experimental and control groups. The control group received a designated physical therapy program and the experimental group received a designated physical therapy program in addition to WBV. Program was performed 3 times a week for 12 weeks. Goniometry, ultrasonography and gross motor function measurements were used to measure knee extension joint angle, fascicle length of hamstrings and function, respectively.ResultsThe results of this study indicated that, designed physical therapy program with WBV could increase the active range of motion in knee extension (p = 0.001) and fascicle length of hamstring (p = 0.001) muscles as well as improve function in children with hemiplegic CP (p = 0.001).Implication for Physiotherapy PracticeAccording to the findings, the use of WBV can be considered as an effective treatment in increasing the range of motion of knee extension and fascicle length and finally improving function in children with CP.

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The effects of spinal flexion exposure on lumbar muscle shear modulus and posture

Vatovec,

Šarabon,

Voglar

2024

Eur J Appl Physiol

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Differences in Medial and Lateral Gastrocnemius Stiffness after Exercise-Induced Muscle Fatigue

Cited by 10 publications

References 58 publications

First-in-human demonstration of floating EMG sensors and stimulators wirelessly powered and operated by volume conduction

First-in-human demonstration of floating EMG sensors and stimulators wirelessly powered and operated by volume conduction

Efficacy of whole body vibration on fascicle length and joint angle in children with hemiplegic cerebral palsy

The effects of spinal flexion exposure on lumbar muscle shear modulus and posture

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