Isolated Infraspinatus Atrophy Secondary to Suprascapular Nerve Neuropathy Results in Altered Shoulder Muscles Activity

2019 ◽  
Vol 28 (3) ◽  
pp. 219-228 ◽  
Author(s):  
Samuele Contemori ◽  
Andrea Biscarini
Keyword(s):  
Shoulder Girdle ◽  
Suprascapular Nerve ◽  
Shoulder Abduction ◽  
Shoulder Injuries ◽  
Response Latencies ◽  
Upper Trapezius ◽  
Volleyball Players ◽  
Shoulder Girdle Muscles ◽  
Semg Activity ◽  
Infraspinatus Atrophy

Context: Isolated infraspinatus atrophy (IIA) is a common condition among overhead activity athletes, which affects the hitting shoulder and is caused by suprascapular nerve injury. The loss of infraspinatus function could lead to altered activity of the glenohumeral and scapulothoracic (ST) muscles and compromise the optimal shoulder function. Objective: To assess the surface electromyographic (sEMG) activity patterns, relationships, and response latencies of relevant shoulder girdle muscles in professional volleyball players with IIA and in healthy control players. Design: Cross-sectional study. Setting: Research laboratory. Patients or Other Participants: Twenty-four male professional volleyball players (12 players with diagnosed IIA and 12 healthy players) recruited from local volleyball teams. Intervention(s): sEMG activity of anterior, middle, and posterior deltoid; upper, middle, and lower trapezius; and serratus anterior (SA) was recorded and evaluated during a movement of shoulder abduction in the scapular plane, monitored with an optoelectronic motion capture system. Main Outcome Measure(s): sEMG activity, relationships, and response latencies of the selected muscles were analyzed with analysis of variance models to highlight statistical differences within and between groups. Results: Athletes with IIA demonstrated significant higher deltoid and trapezius muscles activity and lower SA activity compared with the contralateral shoulder and healthy athletes. The shoulder with IIA also showed a higher activity ratio between the upper trapezius and other ST muscles in addition to anticipated activation of the upper trapezius and delayed activation of the SA, with regard to the onset of shoulder movement. Conclusions: This study highlighted altered shoulder muscle activity levels, ST muscles imbalances, and abnormal ST recruitment patterns in the hitting shoulder of professional volleyball players with IIA, secondary to suprascapular nerve neuropathy. Such shoulder girdle muscles’ impairments may compromise the optimal scapulohumeral rhythm and function, increasing the risk of acute and overuse shoulder injuries.

scholarly journals Electromyographic Evaluation of the Shoulder Muscle after a Fatiguing Isokinetic Protocol in Recreational Overhead Athletes

2021 ◽  
Vol 18 (5) ◽  
pp. 2516
Author(s):  
Sebastian Klich ◽  
Adam Kawczyński ◽  
Bogdan Pietraszewski ◽  
Matteo Zago ◽  
Aiguo Chen ◽  
...  
Keyword(s):  
External Rotation ◽  
Shoulder Girdle ◽  
Median Frequency ◽  
Shoulder Injury ◽  
Overhead Athletes ◽  
Upper Trapezius ◽  
Main Effect ◽  
Shoulder Girdle Muscles ◽  
Exercise Induced ◽  
The Right

The goal of our study was to examine the muscle activity of the shoulder girdle after isokinetic fatigue, which may simulate muscle activities commonly occurring during specific sport-related activities in recreational overhead asymptomatic athletes. We hypothesized that exercise-induced fatigue, reported after isokinetic protocols, may cause a decrease in the median frequency (MF) of the upper trapezius (UT), infraspinatus (IS), and deltoid muscles. Twenty-four male overhead volleyball (n = 8), handball (n = 8), and tennis (n = 8) athletes participated in this study. All subjects were without shoulder injury history. The surface electromyography (SEMG) was collected on the right (dominant) side of the shoulder girdle muscles in the following order: UT, IS and anterior (DA), and posterior deltoideus (DP). The fatigue protocol consisted of three sets of 32 maximum isokinetic concentric contractions while performing shoulder internal and external rotation at an isokinetic speed of 120 o/s. The resultant difference in median frequency (ΔMF) values consistently dropped after the fatiguing tasks across all recorded muscles, in terms of the initial MF (MFINI = 65.1 ± 1.1 Hz) and final MF (MFFIN = 57.9 ± 0.9 Hz), and the main effect of time was significant (F(1,22) = 43.15, p < 0.001). MF values decreased mostly for IS (ΔMFIS = −9.9 ± 1.6 Hz) and DP (ΔMFPD = −9.5 ± 1.9 Hz) muscles, while DA and UT showed smaller changes (ΔMFDA = −6.9 ± 1.5 Hz) and (ΔMFUT = −3.2 ± 1.3 Hz). The results of our study show a meaningful contribution in determining increased fatigue of the shoulder girdle muscles during repeated isokinetic internal-external rotation protocols. We have also demonstrated a significant decrease in MF in all examined muscles, especially IS and DA.

Transfer of the Platysma Motor Branch to the Accessory Nerve in a Patient With Trapezius Muscle Palsy and Total Avulsion of the Brachial Plexus

Neurosurgery ◽  
2011 ◽  
Vol 68 (2) ◽  
pp. E567-E570 ◽  
Author(s):  
Jayme Augusto Bertelli ◽  
Marcos Flávio Ghizoni
Keyword(s):  
Brachial Plexus ◽  
Motor Nerve ◽  
Trapezius Muscle ◽  
Nerve Transfer ◽  
Elbow Flexion ◽  
Suprascapular Nerve ◽  
Accessory Nerve ◽  
Shoulder Abduction ◽  
Motor Branch ◽  
Upper Trapezius

Abstract BACKGROUND AND IMPORTANCE: To report on the successful use of a platysma motor nerve transfer to the accessory nerve in a patient with concomitant trapezius and brachial plexus palsy. CLINICAL PRESENTATION: A 20-year-old man presented with total avulsion of the right brachial plexus combined with palsies of the accessory and phrenic nerve. The patient was operated on 4 months after his injury. The accessory nerve was repaired via direct transfer of the platysma motor branch. The contralateral C7 root was connected to the musculocutaneous nerve, and the hemihypoglossal nerve was grafted to the suprascapular nerve. Two intercostal nerves were attached to the triceps long head motor branch. CONCLUSION: Within 20 months of surgery, the patient regained full reinnervation of the upper trapezius muscle. Elbow flexion scored M3+, and 30° active shoulder abduction was observed. Triceps reinnervation was poor. Platysma motor branch transfer to the accessory nerve is a viable alternative to reinnervate the trapezius muscle.

scholarly journals Isolated and painless infraspinatus atrophy in top-level volleyball players: report of two cases and review of the literature

1993 ◽  
Vol 51 (1) ◽  
pp. 125-129 ◽  
Author(s):  
Célia Harumi Tengan ◽  
Acary S. Bulle Oliveira ◽  
Beatriz Hitomi Kiymoto ◽  
Maria da Penha Ananias Morita ◽  
Jovany L. Alves de Medeiros ◽  
...  
Keyword(s):  
Shoulder Joint ◽  
Suprascapular Nerve ◽  
The Other ◽  
Review Of The Literature ◽  
Direct Trauma ◽  
Distal Branch ◽  
Infraspinatus Muscle ◽  
Volleyball Players ◽  
Intense Activity ◽  
Infraspinatus Atrophy

Isolated and painless infraspinatus atrophy and weakness are described in two top-level volleyball players. EMG revealed isolated denervation of the infraspinatus muscle. One athlete continued playing and his clinical features have not changed. The other recovered her muscle bulk and strength after stopping playing. These findings were attributed to intense activity of the shoulder joint, without any direct trauma. On clinical grounds, we did not consider these cases as true examples of entrapment neuropathy. Pathogenesis was related to traction of the distal branch of the suprascapular nerve during the act of reception of the ball («Manchete»).

scholarly journals Comparison of Upper Arm Kinematics During a Volleyball Spike Between Players With and Without a History of Shoulder Injury

2013 ◽  
Vol 29 (2) ◽  
pp. 155-164 ◽  
Author(s):  
Lara Mitchinson ◽  
Amity Campbell ◽  
Damian Oldmeadow ◽  
Will Gibson ◽  
Diana Hopper
Keyword(s):  
Mixed Models ◽  
Perceived Risk ◽  
Rotation Velocity ◽  
Return To Play ◽  
Shoulder Abduction ◽  
Shoulder Injuries ◽  
Shoulder Injury ◽  
Volleyball Players ◽  
Before And After ◽  
History Of

Volleyball players are at high risk of overuse shoulder injuries, with spike biomechanics a perceived risk factor. This study compared spike kinematics between elite male volleyball players with and without a history of shoulder injuries. Height, mass, maximum jump height, passive shoulder rotation range of motion (ROM), and active trunk ROM were collected on elite players with (13) and without (11) shoulder injury history and were compared using independent samplesttests (P< .05). The average of spike kinematics at impact and range 0.1 s before and after impact during down-the-line and cross-court spike types were compared using linear mixed models in SPSS (P< .01). No differences were detected between the injured and uninjured groups. Thoracic rotation and shoulder abduction at impact and range of shoulder rotation velocity differed between spike types. The ability to tolerate the differing demands of the spike types could be used as return-to-play criteria for injured athletes.

Dystrophinopathies and Limb-Girdle Muscular Dystrophies

2017 ◽  
Vol 48 (04) ◽  
pp. 262-272 ◽  
Author(s):  
Anna Sarkozy ◽  
Mariacristina Scoto ◽  
Francesco Muntoni ◽  
Joana Domingos
Keyword(s):  
Clinical Trials ◽  
Treatment Options ◽  
Shoulder Girdle ◽  
Muscle Disease ◽  
Standards Of Care ◽  
Muscular Dystrophies ◽  
New Treatment ◽  
Shoulder Girdle Muscles ◽  
Independent Ambulation ◽  
Duchenne's Muscular Dystrophy

AbstractMuscular dystrophies are a heterogeneous group of inherited diseases. The natural history of these disorders along with their management have changed mainly due to a better understanding of their pathophysiology, the evolution of standards of care, and new treatment options. Dystrophinopathies include both Duchenne's and Becker's muscular dystrophies, but in reality they are a spectrum of muscle diseases caused by mutations in the gene that encodes the protein dystrophin. Duchenne's muscular dystrophy is the most common form of inherited muscle disease of childhood. The current standards of care considerably prolong independent ambulation and survival. Several therapeutic options either aiming at substituting/correcting the primary protein defect or limiting the progression of the dystrophic process are currently being explored in clinical trials.Limb-girdle muscular dystrophies (LGMDs) are rare and heterogeneous conditions, characterized by weakness and wasting of the pelvic and shoulder girdle muscles. Originally classified into dominant and recessive, > 30 genetic forms of LGMDs are currently recognized. Further understanding of the pathogenic mechanisms of LGMD will help identifying novel therapeutic approaches that can be tested in clinical trials.

scholarly journals Motion Analytics of Trapezius Muscle Activity in an 18-Year-Old Female with Extended Upper Brachial Plexus Birth Palsy

2021 ◽  
Vol 16 (01) ◽  
pp. e51-e55
Author(s):  
Jasmine J. Lin ◽  
Gromit Y.Y. Chan ◽  
Cláudio T. Silva ◽  
Luis G. Nonato ◽  
Preeti Raghavan ◽  
...  
Keyword(s):  
Brachial Plexus ◽  
Upper Extremity ◽  
Muscle Activity ◽  
Visual Analytics ◽  
Three Dimensional ◽  
Trapezius Muscle ◽  
Shoulder Abduction ◽  
Upper Trapezius ◽  
Brachial Plexus Birth Palsy ◽  
Birth Palsy

Abstract Background The trapezius muscle is often utilized as a muscle or nerve donor for repairing shoulder function in those with brachial plexus birth palsy (BPBP). To evaluate the native role of the trapezius in the affected limb, we demonstrate use of the Motion Browser, a novel visual analytics system to assess an adolescent with BPBP. Method An 18-year-old female with extended upper trunk (C5–6–7) BPBP underwent bilateral upper extremity three-dimensional motion analysis with Motion Browser. Surface electromyography (EMG) from eight muscles in each limb which was recorded during six upper extremity movements, distinguishing between upper trapezius (UT) and lower trapezius (LT). The Motion Browser calculated active range of motion (AROM), compiled the EMG data into measures of muscle activity, and displayed the results in charts. Results All movements, excluding shoulder abduction, had similar AROM in affected and unaffected limbs. In the unaffected limb, LT was more active in proximal movements of shoulder abduction, and shoulder external and internal rotations. In the affected limb, LT was more active in distal movements of forearm pronation and supination; UT was more active in shoulder abduction. Conclusion In this female with BPBP, Motion Browser demonstrated that the native LT in the affected limb contributed to distal movements. Her results suggest that sacrificing her trapezius as a muscle or nerve donor may affect her distal functionality. Clinicians should exercise caution when considering nerve transfers in children with BPBP and consider individualized assessment of functionality before pursuing surgery.

scholarly journals Isokinetic Strength Profile of Shoulder Internal and External Rotators of Adolescent Volleyball Players

2014 ◽  
Vol 2 (11_suppl3) ◽  
pp. 2325967114S0027
Author(s):  
Gulcan Harput ◽  
Hande Guney ◽  
Fatma Filiz Colakoglu ◽  
Gul Baltacı
Keyword(s):  
Body Weight ◽  
Repeated Measures ◽  
External Rotation ◽  
Isometric Strength ◽  
Shoulder Abduction ◽  
Strength Testing ◽  
Muscle Testing ◽  
Volleyball Players ◽  
External Rotator ◽  
Limb Dominance

Objectives: The aim of this study was to investigate the effects of limb dominance and gender on isometric, eccentric and concentric strength of the shoulder internal and external rotator muscles in adolescent volleyball players. Methods: Forty adolescent volleyball players [Male: 23( Age: 15.5±1.4 yrs, Body weight: 72±10.2 kg, Height: 184.4±7.6 cm, BMI: 20.9±2.6 kg/m2), Female: ( Age: 16.7±0.9 yrs, Body weight: 60.7±8.2 kg, Height: 172.5±5.3 cm, BMI: 20.4±2.3 kg/m2) participated in this study. Isomed 2000 isokinetic dynamometer was used to measure muscle strength testing. Isometric strength testing of shoulder internal and external rotator muscles were performed at 90 ° shoulder abduction and external rotation position. In the same position, concentric and eccentric muscle testing was performed at 90°/s angular velocity. Strength outcomes were recorded as Nm/kg. 2-way repeated measures of ANOVA was used for statistical analysis. Results: Dominance by gender interaction was not found significant for internal rotator (IR) and external rotator (ER) muscles' strength (IR: F(1,72)=2.87, p=0.06, ER: F(1,72)=1.98, p=0.15). There was a significant strength by dominance interaction for internal rotator muscles (F(2,72)=18.52, p<0.001). Isometric strength was greater in dominant limb (p<0.001)while concentric strength was found greater in non-dominant limb(p=0.006). Eccentric strength was found similar for limbs (p=0.18). IR muscles showed greater strength during eccentric (1.03±0.05), concentric (0.76±0.03) and isometric test (0.69±0.03), respectively. On the other hand, external rotators showed greater strength during eccentric (0.49±0.4), isometric (0.40±0.3) and concentric test (0.36±0.3), respectively. There was no significant gender effect on the strength (IR: F(2,72)=0.31, p=0.73, ER: F(2,72)=0.42, p=0.66). Conclusion: The strength of shoulder internal and external rotator muscles do not differ according to gender in adolescent volleyball players. Limb dominance has an effect on the strength of internal rotator muscles while it has no effect on the strength of external rotators. Both muscle groups show greater strength during eccentric testing.

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