In vivo Mechanical Properties of Proximal and Distal Aponeuroses in Human Tibialis Anterior Muscle

Muramatsu, Tadashi; Muraoka, Tetsuro; Takeshita, Daisuke; Kawakami, Yasuo; Fukunaga, Tetsuo

doi:10.1159/000046189

Cited by 11 publications

(6 citation statements)

References 35 publications

(61 reference statements)

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“…Similarly, the length of the distal aponeurosis is highly variable across muscles, so this was set to L/2 ( Fig. 2), in agreement with previous measurements of human pennate muscles [20], [21].…”

Section: A Anatomical Constraints and Muscle Modelsupporting

confidence: 60%

The Myokinetic Control Interface: How Many Magnets Can be Implanted in an Amputated Forearm? Evidence From a Simulated Environment

Milici

Gherardini

Clemente

et al. 2020

IEEE Trans. Neural Syst. Rehabil. Eng.

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We recently introduced the concept of a new human-machine interface (the myokinetic control interface) to control hand prostheses. The interface tracks muscle contractions via permanent magnets implanted in the muscles and magnetic field sensors hosted in the prosthetic socket. Previously we showed the feasibility of localizing several magnets in nonrealistic workspaces. Here, aided by a 3D CAD model of the forearm, we computed the localization accuracy simulated for three different below-elbow amputation levels, following general guidelines identified in early work. To this aim we first identified the number of magnets that could fit and be tracked in a proximal (T1), middle (T2) and distal (T3) representative amputation, starting from 18, 20 and 23 eligible muscles, respectively. Then we ran a localization algorithm to estimate the poses of the magnets based on the sensor readings. A sensor selection strategy (from an initial grid of 840 sensors) was also implemented to optimize the computational cost of the localization process. Results showed that the localizer was able to accurately track up to 11 (T1), 13 (T2) and 19 (T3) magnetic markers (MMs) with an array of 154, 205 and 260 sensors, respectively. Localization errors lower than 7% the trajectory travelled by the magnets during muscle contraction were always achieved. This work not only answers the question: "how many magnets could be implanted in a forearm and successfully tracked with a the myokinetic control approach?", but also provides interesting insights for a wide range of bioengineering applications exploiting magnetic tracking.

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Section: A Anatomical Constraints and Muscle Modelsupporting

confidence: 60%

The Myokinetic Control Interface: How Many Magnets Can be Implanted in an Amputated Forearm? Evidence From a Simulated Environment

Milici

Gherardini

Clemente

et al. 2020

IEEE Trans. Neural Syst. Rehabil. Eng.

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“…This study chose a prone position for testing, while Muraoka et al (26) and Arampatzis et al (1) chose sitting as their testing position. Additionally, this study used two foot switches to ensure absence of movement at the foot-shoe and shoe-footplate interface during the isometric contractions, whereas other studies (22,24) measured foot movement during the isometric contractions and subsequently subtracted the elongation of the tendon due to passive rotation of the foot from the total elongation measured during the active isometric contraction. These authors argued that inability to account for tendon elongation due to ankle rotation during isometric contractions will lead to an overestimation of tendon displacement values.…”

Section: Discussionmentioning

confidence: 99%

Tendinopathy alters mechanical and material properties of the Achilles tendon

Arya

Kulig

2010

Journal of Applied Physiology

305

276

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The purpose of this study was to investigate the in vivo material and mechanical properties of the human Achilles tendon in the presence of tendinopathy. Real-time ultrasound imaging and dynamometry were used to assess Achilles tendon stiffness, Young's modulus, stress, strain, and cross-sectional area (CSA) in 12 individuals with Achilles tendinopathy and 12 age- and gender-matched controls. The results of this study suggest that tendinopathy weakens the mechanical and material properties of the tendon. Tendinopathic tendons had greater CSA, lower tendon stiffness, and lower Young's modulus. These alterations in mechanical characteristics may put the Achilles tendon at a higher risk to sustain further injury and prolong the time to recovery. Results from this study may be used to design treatment strategies that specifically target these deficits, leading to faster and permanent recovery from tendinopathy.

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“…17,[27][28][29]32 In addition, during isokinetic eccentric muscle actions, the TA muscle fascicles lengthen only slightly and are considered to be acting "quasiisometrically." 36 Therefore, during an eccentric action, the tendon compliance allows the muscle-tendon complex to lengthen and joint motion to occur.…”

Section: Vastus Lateralismentioning

confidence: 99%

“…24 However, it is well known that the compliance of the tendon and aponeurosis will affect the length of the muscle fibers. 1,17,27,29,32 Recently, several studies using ultrasonography have identified an interaction between the change in length of the muscle fascicles and tendon during fixed joint angle (isometric actions), as well as during dynamic activities in humans. For example, there has been much attention given to the mechanical properties of the tibialis anterior (TA) tendon and aponeurosis during fixed joint angle muscle contractions.…”

mentioning

confidence: 99%

“…For example, there has been much attention given to the mechanical properties of the tibialis anterior (TA) tendon and aponeurosis during fixed joint angle muscle contractions. 6,27,29,32 From these reports it is clear that the TA tendon and aponeurosis contribute substantially to the compliance of the muscle-tendon complex during isometric muscle actions, resulting in nonisometric behavior of the fascicles. 17 Similarly, during isometric actions of the medial gastrocnemius, the fascicles shorten and the tendon/aponeurosis lengthens.…”

mentioning

confidence: 99%

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Fascicle Length Change of the Human Tibialis Anterior and Vastus Lateralis During Walking

Chleboun¹,

Busic²,

Graham³

et al. 2007

J Orthop Sports Phys Ther

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Amuscle's ability to produce force during a specific movement is determined by the type of muscle action (concentric, eccentric, or isometric). For example, based on the forcevelocity relationship of muscle, the muscle force decreases with increasing speed of movement during a concentric action, and the force increases during an eccentric action. Superimposing the force-velocity relationship on the length-tension relationship, the force will be optimal at a certain muscle (sarcomere) length during isometric and slow concentric actions. 22The use of kinematics and electromyography (EMG) to determine the type of muscle action assumes that the change in length of the muscle-tendon complex will reflect the change in length of the muscle t Study deSign: A single-group descriptive experimental design.t ObjectiveS: To determine the fascicle length change in the tibialis anterior (TA) and the vastus lateralis (VL) muscles during walking.t bAckgrOund: The length of the muscle fibers during isometric actions and during dynamic functional activities is affected by the compliance of the tendon and aponeurosis. The TA and VL muscles have important functions both in stance and swing phases of gait. Therefore, it is important to understand the dynamics of the muscle length change as it relates to the type of muscle actions in walking.t MethOdS And MeASureS: Nine healthy subjects performed treadmill walking while fascicle length, muscle activity (electromyographic signal), and joint angle (knee and ankle) were recorded. Fascicle length was measured using real-time ultrasound imaging. Fascicle length and joint angle during the gait cycle were analyzed using a repeated-measures analysis of variance.t reSultS: During the initial portion of stance, when the TA and VL muscles were active, the ankle plantar flexed and the knee joint flexed, suggesting muscle-tendon complex lengthening, but the fascicle length of both muscles remained constant (TA, P = .93; VL, P = .22). The TA muscle was again active during the initial portion of swing phase, while the ankle dorsiflexed, and the fascicle length decreased (P,.05). The VL muscle became active again at the end of swing as the knee extended, and the fascicle length decreased (P,.05).t cOncluSiOnS: The lack of change in fascicle length during the initial portions of stance phase suggests a nearly isometric muscle action of the TA and VL. There is a possible interaction occurring between the fascicle and tendon in the TA and VL such that the tendon lengthens to allow joint motion and potentially to store elastic energy.

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In vivo Mechanical Properties of Proximal and Distal Aponeuroses in Human Tibialis Anterior Muscle

Cited by 11 publications

References 35 publications

The Myokinetic Control Interface: How Many Magnets Can be Implanted in an Amputated Forearm? Evidence From a Simulated Environment

The Myokinetic Control Interface: How Many Magnets Can be Implanted in an Amputated Forearm? Evidence From a Simulated Environment

Tendinopathy alters mechanical and material properties of the Achilles tendon

Fascicle Length Change of the Human Tibialis Anterior and Vastus Lateralis During Walking

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