Three-dimensional muscle architecture of the infant and adult trapezius: a cadaveric pilot study

Stiver, Mikaela L.; Bradshaw, Luke R.; Breinhorst, Ethan M.; Agur, Anne; Mirjalili, S. Ali

doi:10.2399/ana.20.828627

Cited by 3 publications

(1 citation statement)

References 30 publications

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“…True subject-specific determination of these parameters requires cadaveric specimen and is impossible to obtain from a living subject. A generic assumption in the literature can be noticed where the parameters were taken from multiple cadaveric measurements [24].…”

Section: Introductionmentioning

confidence: 99%

Upper Extremity Joint Torque Estimation Through an Electromyography-Driven Model

Tahmid

Font-Llagunes

Yang

2022

Journal of Computing and Information Science in Engineering

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Cerebrovascular accidents like a stroke can affect lower limb as well as upper extremity joints (i.e., shoulder, elbow or wrist) and hinder the ability to produce necessary torque for activities of daily living. In such cases, muscles ability to generate forces reduces, thus affecting the joints torque production. Understanding how muscles generate forces is a key element to injury detection. Researchers have developed several computational methods to obtain muscle forces and joint torques. Electromyography (EMG) driven modeling is one of the approaches to estimate muscle forces and obtain joint torques from muscle activity measurements. Musculoskeletal models and EMG-driven models require necessary muscle-specific parameters for the calculation. The focus of this study is to investigate the EMG-driven approach along with an upper extremity musculoskeletal model to determine muscle forces of two major muscle groups, biceps brachii and triceps brachii, consisting of seven muscle-tendon units. Estimated muscle forces are used to determine the elbow joint torque. Experimental EMG signals and motion capture data are collected for a healthy subject. The musculoskeletal model is scaled to match the geometric parameters of the subject. Then, the approach calculates muscle forces and joint moment for two tasks: simple elbow flexion-extension and triceps kickback. Individual muscle forces and net joint torques for both tasks are estimated. The study also has compared the effect of muscle-tendon parameters (optimal fiber length and tendon slack length) on the estimated results.

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Section: Introductionmentioning

confidence: 99%

Upper Extremity Joint Torque Estimation Through an Electromyography-Driven Model

Tahmid

Font-Llagunes

Yang

2022

Journal of Computing and Information Science in Engineering

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Trapezius Muscle Flap for Posterior Neck and Shoulder Defects Following Malignant Tumor Resection—A Case Series from a Tertiary Cancer Facility

Lakhera,

Babu,

Singh

et al. 2024

Indian J Surg Oncol

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Human trapezius muscle development during the early fetal period

Iwasa,

Kanahashi,

Imai

et al. 2024

Journal of Anatomy

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This study aimed to observe human trapezius muscle (TpzM) development during early fetal period and apply diffusion tensor imaging (DTI) analysis to describe the muscle architecture that leads to physiological functions. Human embryonic and early fetal specimens were selected for this study. TpzM was first detected at Carnegie stage 20. The position of the TpzM changed with the formation of the scapula, clavicle, and vertebrae, which are its insertions and origins. DTI revealed the fiber orientation from each vertebral level to dissect each muscle. Fiber orientation in the ventral view gradually changed from the cervical to thoracic vertebrae, except for the middle part at which the insertions changed, which was almost similar in all early fetal specimens. The TpzM volume increased from C1 to C7 in the upper part, reached local maxima at C6 and C7 in the middle, and then decreased. These muscles can be categorized into three parts according to their insertions and presented with the features of each part. The fiber orientation and distribution of the three parts at the vertebral level were almost constant during the early fetal period. The border between the upper and middle parts was mainly located around the C6 and C7 vertebral levels, whereas the middle and lower parts were between the Th1 and Th2 vertebral levels. A three‐dimensional change in the fiber orientation in the upper part of the TpzM according to the vertebral level was noticeable. Our data will help to elucidate the developmental processes of TpzM.

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Three-dimensional muscle architecture of the infant and adult trapezius: a cadaveric pilot study

Cited by 3 publications

References 30 publications

Upper Extremity Joint Torque Estimation Through an Electromyography-Driven Model

Upper Extremity Joint Torque Estimation Through an Electromyography-Driven Model

Trapezius Muscle Flap for Posterior Neck and Shoulder Defects Following Malignant Tumor Resection—A Case Series from a Tertiary Cancer Facility

Human trapezius muscle development during the early fetal period

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