trapezius

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tra·pe·zi·us (mus·cle)

[TA]
extrinsic (thoracoappendicular) muscle of shoulder; origin, medial third of superior nuchal line, external occipital protuberance, ligamentum nuchae, spinous processes of seventh cervical and the thoracic vertebrae and corresponding supraspinous ligaments; insertion, lateral third of posterior surface of clavicle, anterior side of acromion, and upper and medial border of the spine of the scapula; action, when scapulae are fixed, portions of muscle can act independently: cervical portion elevates scapula, thoracic portion contributes to depression of scapula; upper and lowermost portions act simultaneously to rotate glenoid fossa superiorly; when the entire muscle and especially middle part contracts, the scapulae retract; draws head to one side or backward; nerve supply, motor by accessory, sensory by cervical plexus.
Synonym(s): musculus trapezius [TA], cowl muscle

trapezius

(trə-pē′zē-əs)
n. pl. trapezi·uses
Either of two large flat triangular muscles running from the base of the occiput to the middle of the back that support and make it possible to raise the head and shoulders.

tra·pe·zi·us mu·scle

(tră-pē'zē-ŭs mŭs'ĕl)
Origin, medial third of superior nuchal line, external occipital protuberance, ligamentum nuchae, spinous processes of seventh cervical and the thoracic vertebrae and corresponding supraspinous ligaments; insertion, lateral third of posterior surface of clavicle, anterior side of acromion, and upper and medial border of the spine of the scapula; action, when scapulae are fixed, portions of muscle can act independently: cervical portion elevates scapula, thoracic portion contributes to depression of scapula; upper and lowermost portions act simultaneously to rotate glenoid fossa superiorly; when the entire muscle and especially its middle part contracts, the scapulae retract; draws head to one side or backward; nerve supply, motor by accessory, sensory by cervical plexus.
Synonym(s): musculus trapezius [TA] , trapezius.
References in periodicals archive ?
Regarding the trapezius muscles, conscious abdominal contraction is effective when combined with a bilateral push-up exercise, but not with the 3-point push-up, reinforcing the importance of the type of exercise on muscular behavior.
A possible explanation for the difference in muscle strength results between the deltoid, neck flexors and trapezius muscles may be due to the functional and physiological differences of the muscles.
The effect of dry needling on pain, pressure pain threshold and disability in patients with a myofascial trigger point in the upper trapezius muscle. J Bodyw Mov Ther.
In this observational study (case series), over a period of two years from August 2014 to July 2016, 41 male patients and 1 female patient with longstanding brachial plexus palsy underwent secondary reconstruction of the shoulder by transfer of trapezius muscle to proximal humerus.
(12) The PPTs were examined with manual algometer in the following sites: (i) the middle point of the dorsum of the forearm; (ii) the middle point of the upper trapezius muscle; and (iii) paravertebral muscles at L1, L3, and L5 levels were examined bilaterally.
Cervical muscle tension was measured bilaterally at the superior part of the trapezius muscle using a tissue hardness meter (Muscle Meter PEK-1, Imoto Inc., Kyoto, Japan); the mean value of three measurements was recorded.
The %MVC of the sternocleidomastoid and trapezius muscles during playing BW-SM instruments was significantly higher than in the WW-wR and WW-woR groups.
Shoulder and scapula are the most common areas for myofascial pain syndrome, especially upper trapezius muscle among overhead sport activities such as badminton, volleyball, water polo and also swimming (1, 7-9).
M engaged in sEMG training to increase her awareness of muscle tension and muscle behavior in her upper trapezius muscles. During her sessions, she was given visual, auditory, and tactile feedback; she would then use the feedback to aid in achieving desired changes, such as decreased muscle tension, improved release of tension after activation, and general changes in muscle tension behavior.
These postures, combined with recurring movements, lead to fatigue of the trapezius muscles. (7) In dentists and dental hygienists, high levels of flexion and rotation of the neck, along with forward leaning posture, increase the chance of musculoskeletal disorders of the neck and shoulders.
The latissimus dorsi and trapezius muscles are also involved in extending the trunk (Kendall et al., 1993).
A pre-modulated bipolar electrotherapeutic current (80-120hz) was applied to the rhomboids and upper trapezius muscles. Spinal manipulative therapy from T3-8 was performed in a supine manner (Anterior Thoracic procedure) (7) for a period of 8 weeks, 2-3 times per week (total of 18 visits), followed by a simple, active pectoralis muscle stretch involving shoulder extension with scapular retraction (3 sets of 20 sec.