The supporting role of the teres major muscle, an additional component in glenohumeral stability? An anatomical and radiological study

Barra-López, Martín Eusebio; López-de-Celis, Carlos; Pérez‐Bellmunt, Albert; Puyalto, Paloma; Sanchez-Fernández, Juan José; Lucha-López, María Orosia

doi:10.1016/j.mehy.2020.109728

Cited by 5 publications

(3 citation statements)

References 18 publications

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“…More examples of differences in our preferred activation direction and the presumed role of the muscle from anatomy include TERMAJ, resisting primarily flexion loads rather than abduction loads, and ADELT, resisting mainly extension with some abduction rather than extension and adduction. The biomechanical constraints that may explain the TERMAJ result is its role in stabilizing the glenohumeral head ( Barra-López et al, 2020 ). These differences between how the central nervous system used the shoulder muscles and their assumed function based on anatomy highlights the need for physiologically based muscular recruitment in feedback-controlled HBM.…”

Section: Discussionmentioning

confidence: 99%

Dynamic Spatial Tuning Patterns of Shoulder Muscles with Volunteers in a Driving Posture

Fice

Larsson

Davidsson

2021

Front. Bioeng. Biotechnol.

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Computational human body models (HBMs) of drivers for pre-crash simulations need active shoulder muscle control, and volunteer data are lacking. The goal of this paper was to build shoulder muscle dynamic spatial tuning patterns, with a secondary focus to present shoulder kinematic evaluation data. 8M and 9F volunteers sat in a driver posture, with their torso restrained, and were exposed to upper arm dynamic perturbations in eight directions perpendicular to the humerus. A dropping 8-kg weight connected to the elbow through pulleys applied the loads; the exact timing and direction were unknown. Activity in 11 shoulder muscles was measured using surface electrodes, and upper arm kinematics were measured with three cameras. We found directionally specific muscle activity and presented dynamic spatial tuning patterns for each muscle separated by sex. The preferred directions, i.e. the vector mean of a spatial tuning pattern, were similar between males and females, with the largest difference of 31° in the pectoralis major muscle. Males and females had similar elbow displacements. The maxima of elbow displacements in the loading plane for males was 189 ± 36 mm during flexion loading, and for females, it was 196 ± 36 mm during adduction loading. The data presented here can be used to design shoulder muscle controllers for HBMs and evaluate the performance of shoulder models.

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Section: Discussionmentioning

confidence: 99%

Dynamic Spatial Tuning Patterns of Shoulder Muscles with Volunteers in a Driving Posture

Fice

Larsson

Davidsson

2021

Front. Bioeng. Biotechnol.

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“…Therefore, the shift of the humeral head generates an attenuation of the anterior part of the capsule and ligaments of the TS, causing different injuries, such as anterior instability, labrum injuries or shoulder impingements [ 6 , 7 , 9 , 10 , 11 , 12 , 13 ]. However, a recent study suggested a new paradigm in the shoulder complex [ 16 ]. The teres major muscle seems to be an additional component in the glenohumeral stability.…”

Section: Introductionmentioning

confidence: 99%

“…The teres major muscle seems to be an additional component in the glenohumeral stability. This muscle also resists the inferior displacement of the humeral head when the arm is being lifted [ 16 ]. So, its dysfunction due to the repetitive movements at high velocity, could be related to glenohumeral ROM changes.…”

Section: Introductionmentioning

confidence: 99%

Effects of Dry Needling in Teres Major Muscle in Elite Handball Athletes. A Randomised Controlled Trial

Ceballos‐Laita

Medrano-de-la-Fuente

Estébanez-de-Miguel

et al. 2021

JCM

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Objective: To determine the effects of dry needling (DN) in active myofascial trigger points in the teres major muscle compared to an untreated control group in pain during throwing actions, shoulder range of motion (ROM), strength, and extensibility of the tissues in professional handball (HB) athletes. Methods: A randomised, single-blinded, controlled clinical trial was designed. Thirty HB athletes with shoulder pain were randomly assigned to the DN group (n = 15) or control group (n = 15). The DN group received a single session of ultrasound-guided DN technique in the teres major muscle. The control group received no intervention. Pain intensity during throwing actions (Numeric Pain Rating Score), shoulder ROM (inclinometer), isometric strength (hand-held dynamometer), and extensibility (inclinometer) were measured before and after treatment. Results: DN group showed statistically significant improvements with large effect sizes for pain intensity (p < 0.001; E.S: 1.3), internal rotation ROM (p < 0.001; E.S: 3.0) and extensibility (p < 0.001; E.S: 2.9) compared to the control group. No statistically significant differences were found for isometric strength (p > 0.05). Conclusion: A single session of DN in the teres major muscle was effective for improving pain intensity during throwing actions, internal rotation ROM and extensibility in HB athletes with shoulder pain.

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Benefits of Training the Iron Cross With Herdos Devices and External Load Added to Body Weight for Young Nonachiever Gymnasts

Marina,

Torrado,

Ferrer-Uris

et al. 2023

International Journal of Sports Physiology and Performance

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Purpose: To verify whether training the iron cross (IC) with assistive devices (herdos; HIC) and added external load (LHIC) to equate the moments of force developed on the rings could be considered an intermediate step between the nonoverloaded herdos situation (HIC) and the IC performed on the rings. Methods: Relative levels of surface electromyography (sEMG) activity were normalized with respect to a standing IC before comparing gymnasts who can perform the IC on the rings (achievers) and gymnast who cannot (nonachievers) in the 2 herdos conditions (HIC and LHIC). Seven muscles were chosen for sEMG analysis, namely, pectoralis major (PM), latissimus dorsi, teres major, lower trapezius, serratus anterior, biceps brachii (BB), and triceps brachii. Additionally, 3 indices were calculated to measure levels of coactivation: Elbowidx, Scapulaidx, and Shoulderidx. Results: The bigger magnitude of differences in sEMG activity among situations was found for the PM and BB (F ≥ 30.7; P < .001). When comparing the global and the PM, teres major, BB, and triceps brachii activity across groups, nonachievers activated their musculature to a greater extent than the achievers independently of the herdos situation (P ≤ .046). Achievers’ Elbowidx was the only index that was significantly higher (P ≤ .005) in the IC in comparison to LHIC and HIC. Conclusion: sEMG activity of PM and BB was particularly sensitive between situations, independently of the level of achievement. We recommend training the IC by adding external load in the herdos situation to increase muscle activity to levels closer to the rings situation but avoiding the potential factor of injuries.

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The supporting role of the teres major muscle, an additional component in glenohumeral stability? An anatomical and radiological study

Cited by 5 publications

References 18 publications

Dynamic Spatial Tuning Patterns of Shoulder Muscles with Volunteers in a Driving Posture

Dynamic Spatial Tuning Patterns of Shoulder Muscles with Volunteers in a Driving Posture

Effects of Dry Needling in Teres Major Muscle in Elite Handball Athletes. A Randomised Controlled Trial

Benefits of Training the Iron Cross With Herdos Devices and External Load Added to Body Weight for Young Nonachiever Gymnasts

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