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overuse atrophy

Samuele Contemori, Andrea Biscarini
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 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...
January 24, 2018: Journal of Sport Rehabilitation
Mitsuhiro Fujiwara, Masahiro Iwata, Takayuki Inoue, Yosuke Aizawa, Natsumi Yoshito, Kazuhiro Hayashi, Shigeyuki Suzuki
Work-related musculoskeletal disorders (WMSD) are caused by the overuse of muscles in the workplace. Performing repetitive tasks is a primary risk factor for the development of WMSD. Many workers in highly repetitive jobs exhibit muscle pain and decline in handgrip strength, yet the mechanisms underlying these dysfunctions are poorly understood. In our study, rats performed voluntary repetitive reaching and grasping tasks (Task group), while Control group rats did not perform these activities. In the Task group, grip strength and forearm flexor withdrawal threshold declined significantly from week 2 to week 6, compared with these values at week 0 ( P  <   0...
November 2017: FEBS Open Bio
Arjen Bergsma, Mariska M H P Janssen, Alexander C H Geurts, Edith H C Cup, Imelda J M de Groot
The aim of this research was to study impairments, activity limitations and participation restrictions due to upper limb involvement in people with four different types of neuromuscular disorders (NMD) - FacioScapuloHumeral Dystrophy (FSHD), Limb-Girdle Muscular Dystrophy (LGMD), Spinal Muscular Atrophy (SMA) and Duchenne Muscular Dystrophy (DMD) - and to investigate whether common or different profiles could be identified. Total of 267 respondents with NMD from the Netherlands answered a set of questionnaires covering upper limb impairments (pain and stiffness), activity limitations and participation restrictions...
September 15, 2017: Neuromuscular Disorders: NMD
Brad Muir
OBJECTIVE: The purpose of this paper is to elucidate this little known cause of upper back pain through a narrative review of the literature and to discuss the possible role of the dorsal scapular nerve (DSN) in the etiopathology of other similar diagnoses in this area including cervicogenic dorsalgia (CD), notalgia paresthetica (NP), SICK scapula and a posterolateral arm pain pattern. BACKGROUND: Dorsal scapular nerve (DSN) neuropathy has been a rarely thought of differential diagnosis for mid scapular, upper to mid back and costovertebral pain...
August 2017: Journal of the Canadian Chiropractic Association
Samuele Contemori, Andrea Biscarini, Fabio Massimo Botti, Daniele Busti, Roberto Panichi, Vito Enrico Pettorossi
CONTEXT: Isolated infraspinatus muscle atrophy (IIMA) only affects the hitting shoulder of overhead-activity athletes, and is caused by suprascapular nerve neuropathy. No study has assessed the static and dynamic stability of the shoulder in overhead professional athletes with IIMA to reveal possible shoulder sensorimotor alterations. OBJECTIVE: To assess the shoulder static stability, dynamic stability, and strength in professional volleyball players with IIMA and in healthy control players...
June 12, 2017: Journal of Sport Rehabilitation
R H Dressendorfer, C E Wade
In brief: Indicators of muscular injury from overtraining were studied in 12 male runners during a road race held over 20 days. Dally mileage averaged 17.3 miles per day, twice their regular training distance. Most of the runners reported persistent mild-to-moderate thigh muscle soreness or stiffness. Serum creatine kinase (CK), an enzymatic marker of muscle tissue injury, was elevated on mornings after running but returned to normal values when the runners rested for two days after day 10. Thigh circumference became significantly reduced during the race, suggesting that the unaccustomed high running mileage also produced thigh muscle atrophy...
November 1983: Physician and Sportsmedicine
Nagat Frara, Samir M Abdelmagid, Michael Tytell, Mamta Amin, Steven N Popoff, Fayez F Safadi, Mary F Barbe
BACKGROUND: Expression of the growth factor osteoactivin (OA) increases during tissue degeneration and regeneration, fracture repair and after denervation-induced disuse atrophy, concomitant with increased matrix metalloproteinases (MMPs). However, OA's expression with repetitive overuse injuries is unknown. The aim of this study was to evaluate: 1) OA expression in an operant rat model of repetitive overuse; 2) expression of MMPs; 3) inflammatory cytokines indicative of injury or inflammation; and 4) the inducible form of heat shock protein 70 (HSPA1A/HSP72) as the latter is known to increase during metabolic stress and to be involved in cellular repair...
January 18, 2016: BMC Musculoskeletal Disorders
Tzu-Hsien Lai, Ekaterina Protsenko, Yu-Chen Cheng, Marco L Loggia, Gianluca Coppola, Wei-Ta Chen
Headaches are universal experiences and among the most common disorders. While headache may be physiological in the acute setting, it can become a pathological and persistent condition. The mechanisms underlying the transition from episodic to chronic pain have been the subject of intense study. Using physiological and imaging methods, researchers have identified a number of different forms of neural plasticity associated with migraine and other headaches, including peripheral and central sensitization, and alterations in the endogenous mechanisms of pain modulation...
2015: Neural Plasticity
Seung Jun Seol, Seung Hoon Han
Scapulothoracic bursitis is a rare disease and presents as pain or swelling around the bursa of the scapulothoracic articulation. It has been reported to be related to chronic repetitive mechanical stress of the periscapular tissue, trauma, overuse, and focal muscle weakness. The authors experienced an atypical case of scapulothoracic bursitis with shoulder and periscapular pain after quadriparesis.This case implies that muscular atrophy around the scapula and chest wall from quadriparesis may contribute to the development of scapulothoracic bursitis with shoulder and periscapular pain...
April 2015: Medicine (Baltimore)
T Stein, J Buckup, T Efe, R von Eisenhart-Rothe, R Hoffmann, E Zimmermann, F Welsch
INTRODUCTION: Muscular recovery of structural integrity after arthroscopic Bankart repair using the para- and trans-musculotendinous three-portal technique has not been investigated. MATERIALS AND METHODS: Twenty-seven athletes [mean age 26.9 years, (group 1; G1)] were prospectively and longitudinally monitored after arthroscopic Bankart repair using the three-portal technique by magnetic resonance imaging (MRI) and specific clinical muscular testing. The muscular integrity was assessed at the subscapularis (SSC) for the para-tendinous anteroinferior portal, the supraspinatus (SSP) for the trans-tendinous suprabicipital portal, and the infraspinatus (ISP) for the trans-tendinous posterior portal...
March 2015: Archives of Orthopaedic and Trauma Surgery
Eva Cernuda-Morollón, César Ramón, Davinia Larrosa, Rocío Alvarez, Nuria Riesco, Julio Pascual
BACKGROUND: OnabotulinumtoxinA (onabotA) has shown its efficacy over placebo in chronic migraine (CM), but clinical trials lasted only up to one year. OBJECTIVE: The objective of this article is to analyse our experience with onabotA treatment of CM, paying special attention to what happens after one year. PATIENTS AND METHODS: We reviewed the charts of patients with CM on onabotA. Patients were injected quarterly during the first year but the fifth appointment was delayed to the fourth month to explore the need for further injections...
September 2015: Cephalalgia: An International Journal of Headache
John Karl L de Dios, Joseph A Shrader, Galen O Joe, Jeffrey C McClean, Kayla Williams, Robert Evers, May Christine V Malicdan, Carla Ciccone, Ami Mankodi, Marjan Huizing, John C McKew, David A Bluemke, William A Gahl, Nuria Carrillo-Carrasco
GNE myopathy is a rare autosomal recessive muscle disease caused by mutations in GNE, the gene encoding the rate-limiting enzyme in sialic acid biosynthesis. GNE myopathy usually manifests in early adulthood with distal myopathy that progresses slowly and symmetrically, first involving distal muscles of the lower extremities, followed by proximal muscles with relative sparing of the quadriceps. Upper extremities are typically affected later in the disease. We report a patient with GNE myopathy who presented with asymmetric hand weakness...
December 2014: Neuromuscular Disorders: NMD
R Buschbacher
The use of ankle bracing, taping, and wrapping for athletic injuries is both overused and underused. The overuse occurs in patients who don't need ankle support at all, or who don't need it anymore. Underuse occurs in patients who could potentially return to activity sooner with the extra support.It is now well established and accepted that prolonged immobilization of a body part brings with it a number of deleterious effects. Immobilized animals have been shown to have decreased strength of muscles, bones, tendons, and ligaments...
January 1, 1993: Journal of Back and Musculoskeletal Rehabilitation
Jesús Esteban
In 1875 M. Raymond described a progressive muscle wasting and weakness in 3 individuals survivors of childhood acute poliomyelitis. Jean-Martin Charcot suggested that the initial injury should let these guys neurons more sensitive to develop posterior spinal diseases and new weakness was the result of overuse of the affected muscles. In 1979, after the publication of the description given by a 57 year old patient on motor difficulties that developed after suffering of polio in childhood, there was a very significant increase of comments of other individuals with similar symptoms, reaching wedged in the 80s the term of post-polio syndrome...
September 2013: Revista Española de Salud Pública
Augustine H Conduah, Champ L Baker, Champ L Baker
CONTEXT: Symptomatic scapulothoracic bursitis and crepitus are disorders of the scapulothoracic articulation that are often poorly understood. They can be a source of persistent pain and dysfunction in the active overhead throwing athlete. It is important to distinguish between scapulothoracic bursitis and scapulothoracic crepitus. Scapulothoracic bursitis refers to inflammation of the bursae secondary to trauma or overuse owing to sports activities or work. Scapulothoracic crepitus is defined by a grinding, popping, or thumping sound or sensation secondary to abnormal scapulothoracic motion...
March 2010: Sports Health
J Facione, J M Beis, G T Kpadonou, D Lagauche, A Touillet, M Braun, L Le Chapelain, J Paysant
STUDY DESIGN: Case report. OBJECTIVES: To describe a case of suprascapular nerve entrapment (SNE) in a patient with a spinal cord injury (SCI) as a cause of shoulder pain. SETTING: Physical Medicine and Rehabilitation Institute, Nancy, France. REPORT: Six months after the occurrence of acute paraplegia T9 ASIA, a 45-year-old man complained of pain in the posterior and lateral areas of the left shoulder. A clinical assessment found an atrophy of the infraspinatus muscle and a muscular weakness during external shoulder rotation...
June 2011: Spinal Cord
Tiziana Pietrangelo, Cristina Puglielli, Rosa Mancinelli, Sara Beccafico, Giorgio Fanò, Stefania Fulle
Sarcopenia is the age-related loss of muscle mass, strength and function. Human muscle proteins are synthesized at a slower rate in the elderly than in young adults, leading to atrophy and muscle mass loss with a decline in the functional capability. Additionally, aging is accompanied by a decrease in the ability of muscle tissue to regenerate following injury or overuse due to the impairment of intervening satellite cells, in which we previously reported oxidative damage evidences. The aim of the present study was to determine the effects of aging on myoblasts and myotubes obtained from human skeletal muscle, and characterize the transcriptional profile as molecular expression patterns in relation to age-dependent modifications in their regenerative capacity...
August 2009: Experimental Gerontology
Sarah B Goldman, Teresa L Brininger, Amanda Antczak
NARRATIVE REVIEW: Patients with focal hand dystonia and upper extremity entrapment neuropathies may present with similar symptoms and risk factors making it difficult to distinguish between the two diagnoses. Evaluating for the presence of neuromuscular findings and abnormal movement patterns can help assist the hand therapist in identifying the presence of focal hand dystonia or peripheral motor axon involvement in the absence of pronounced muscle atrophy. The purposes of this review article are twofold. First, to describe selected neuromuscular signs and symptoms characteristic of patients presenting with repetitive overuse syndromes of the upper limb leading to either a nerve entrapment syndrome or a focal hand dystonia...
April 2009: Journal of Hand Therapy: Official Journal of the American Society of Hand Therapists
Jeffrey C Y Chan, William H Tiong, Michael J Hennessy, John L Kelly
BACKGROUND: Occupational overuse syndrome (OOS) can present as Guyon's canal syndrome in computer keyboard users. We report a case of Guyon's canal syndrome caused by a ganglion in a computer user that was misdiagnosed as OOS. CASE PRESENTATION: A 54-year-old female secretary was referred with a six-month history of right little finger weakness and difficulty with adduction. Prior to her referral, she was diagnosed by her general practitioner and physiotherapist with a right ulnar nerve neuropraxia at the level of the Guyon's canal...
February 12, 2008: Journal of Brachial Plexus and Peripheral Nerve Injury
Keitaro Kubo, Yoshie Ishida, Teruaki Komuro, Naoya Tsunoda, Hiroaki Kanehisa, Tetsuo Fukunaga
BACKGROUND: Recently, the number of elderly individuals who participate in sports has increased, thus injuries from overuse are now becoming recognized in the elderly population. Therefore, it is important to determine which muscle groups and tendons are most affected with aging to plan appropriate exercise interventions for elderly individuals. In particular, muscles and tendons in knee extensors and plantar flexors play an important role during locomotion. The purpose of this study was to compare the knee extensor and plantar flexor muscles and tendons...
November 2007: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
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