Poor visual ergonomics is associated with visual and neck/shoulder discomfort, but the relation between visual demands and neck/shoulder muscle activity is unclear. The aims of this study were to investigate whether trapezius muscle activity was affected by: (i) eye-lens accommodation; (ii) incongruence between accommodation and convergence; and (iii) presence of neck/shoulder discomfort. Sixty...

For normal shoulder joint movements, sternoclavicular articulation, the acromioclavicular joint, the glenohumeral joints, and the scapulothoracic joints should be coordinated. For remedial program after arthroscopic surgery for rotator damage, muscle exercise for the rotator should be regarded as an important factor, and clinical approaches should be adopted to promote muscle control and balanc...

[Purpose] The purpose of this study was to examine correlations between muscle activities and strap length and type of the school bag during walking. [Subjects and Methods] The subjects of this study were 20 healthy students. An 8-channel electromyograph (8-EMG) (Pocket EMG, BTS, Italy) was used to measure the muscle activities of the right upper trapezius, left upper trapezius, right erector s...

PURPOSE Damage to the spinal accessory nerve (SAN) can result in denervation of the trapezius muscle in patients undergoing surgery for head and neck cancer. Trapezius denervation leads to muscle weakness and dysfunction that, for some patients, persists despite the return of conduction along the SAN. This prospective case series describes an intervention involving a combination of a novel type...

[Purpose] This study was aimed at investigating the influence of seat height and body posture on the activity of the superior trapezius and longissimus muscles. [Subjects and Methods] Twenty two healthy subjects were instructed to perform a total of eight different body postures, varying according three main factors: seat height (low and high seat); trunk inclination (upright and leaning forwar...

S capular winging typically results from serratus anterior dysfunction caused by injury to the long thoracic nerve or from trapezius dysfunction caused by injury to the spinal accessory nerve. The surgical treatment of choice for scapular winging caused by trapezius palsy is the Eden-Lange procedure. This procedure, as modified by Bigliani et al., includes transfer of the levator scapulae muscl...

The awkward movements and postures associated with childcare activities can lead to musculoskeletal symptoms in the neck and shoulders. "Dakko" is a method for carrying a child in Japan, and recently it has been reported to cause shoulder stiffness. To our knowledge, the relationship between childcare activities and the physical load on the neck and shoulders is poorly understood. The present s...

UNLABELLED The most common complication of neck dissection is shoulder dysfunction due to manipulation of spinal accessory nerve, resulting in trapezius muscle atrophy mainly in procedures involving the posterior neck triangle. AIM This study used electromyography to evaluate the injury to the spinal accessory nerve following neck dissection. MATERIALS AND METHODS Prospective case series of...

Objective: To clarify the indications and to describe the surgical technique and outcomes of surgery involving transfer of the trapezius to the deltoid for the treatment of lesions of the brachial plexus in patients with multidirectional instability in the shoulder. Method: In 17 patients (mean age, 23 years) operated at São Vicente de Paulo Hospital and the Institute of Orthopedics and Traumat...

QUESTION Can real-time visual feedback facilitate the activity of serratus anterior in individuals with scapular winging during shoulder flexion? DESIGN Comparative, repeated-measures experimental study. PARTICIPANTS Nineteen subjects with scapular winging. INTERVENTION Participants performed isometric shoulder flexion at 60° and 90° with and without real-time visual feedback using a vide...