STUDY DESIGN This study used a prospective, single-group repeated-measures design to analyze differences between the electromyographic (EMG) amplitudes produced by exercises for the trapezius and serratus anterior muscles. OBJECTIVE To identify high-intensity exercises that elicit the greatest level of EMG activity in the trapezius and serratus anterior muscles. BACKGROUND The trapezius and...

Pain and tenderness of the upper trapezius muscle is frequent in several occupational groups. The objective of this study is to investigate the effect of three contrasting interventions on muscle function and pain in women with trapezius myalgia. A group of employed women (n = 42) with a clinical diagnosis of trapezius myalgia participated in a 10-wk randomized controlled intervention: specific...

[Purpose] To measure the activities of the upper, middle, and lower trapezius and serratus anterior muscles during shoulder abduction at two angles and compare their relative isolation. [Subjects and Methods] Ten men were enrolled. The tester measured the isolation ratios of upper, middle, and lower trapezius and serratus anterior muscles during shoulder abduction exercises at 60° and 120°. [Re...

BACKGROUND Restoration of control of dynamic scapular motion by specific activation of the serratus anterior and lower trapezius muscles is an important part of functional rehabilitation. This study evaluated activation of those muscles in specific exercises. HYPOTHESIS Specific exercises will activate key scapular-stabilizing muscles in clinically significant amplitudes and patterns. STUDY...

Trapezius muscle injuries often occur in conjunction with high-grade acromioclavicular joint injuries [1], but to our knowledge, isolated trapezius injuries have not been described in the literature. We present a case of isolated trapezius strain in a spastic patient with multiple sclerosis documented with magnetic resonance imaging (MRI).

The prevalence of chronic trapezius myalgia is high in women with high exposure to awkward working positions, repetitive movements and movements with high precision demands. The mechanisms behind chronic trapezius myalgia are not fully understood. The purpose of this study was to explore the differences in protein content between healthy and myalgic trapezius muscle using proteomics. Muscle bio...

PURPOSE We investigated the best position for shoulder retractor strengthening exercise to maximize middle trapezius activity and minimize rhomboid major activity. Although both trapezius and rhomboids are scapular retractors, rhomboids also act as downward rotators of the scapula, which can worsen subacromial impingement. METHODS Twelve healthy participants (age 30 [SD 6] y) with no history ...

We present two children with hypoplasia of the left trapezius muscle and a history of ipsilateral transient neonatal brachial plexus palsy without documented trapezius weakness. Magnetic resonance imaging in these patients with unilateral left hypoplasia of the trapezius revealed decreased muscles in the left side of the neck and left supraclavicular region on coronal views, decreased muscle ma...

Trapezius is commonly a ected in work-related musculoskeletal disorders. The H re ex may be a good tool to provide knowledge about the mechanisms involved in this motor dysfunction. In trapezius, previous ndings has described both ipsilateral and unusual crossed H re exes. Our study aimed to con rm these ndings by investigating the responses evoked in trapezius by stimulation of the C3/4 cervic...

BACKGROUND This study uses virtual touch imaging quantification (VTIQ) technology for the first time to conduct measurements of the trapezius and erector spinae muscles in a large study population. The significance of various influencing factors, such as age and sex, are also examined. METHOD The study population comprised 278 subjects. The Siemens Acuson S3000 and VTIQ technology were used f...