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The trapezius [4] is a large paired trapezoid-shaped surface muscle that extends longitudinally from the occipital bone to the lower thoracic vertebrae of the spine and laterally to the spine of the scapula. It moves the scapula and supports the arm. The trapezius has three functional parts: an upper (descending) part which supports the weight ...
The spinal component of the accessory nerve provides motor control of the sternocleidomastoid and trapezius muscles. [8] The trapezius muscle controls the action of shrugging the shoulders, and the sternocleidomastoid the action of turning the head. [8] Like most muscles, control of the trapezius muscle arises from the opposite side of the ...
Trapezius.png (510 × 504 pixels, file size: 138 KB, MIME type: image/png) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
Upper Limb, Arm, Anterior compartment, right/left anterior surface of humerus (mainly distal half) coronoid process of ulna, tuberosity of ulna: radial recurrent artery: musculocutaneous nerve: flexes elbow: triceps brachii: 2 1 triceps brachii: Upper Limb, Arm, Posterior compartment, right/left long head: infraglenoid tubercle of scapula
Secondary to serratus anterior palsy, a winged scapula is also caused by trapezius and rhomboid muscle palsy involving the accessory nerve and the dorsal scapular nerve, respectively. [ 1 ] Though the most common causes of a winged scapula is due to serratus anterior palsy, and less commonly trapezius and rhomboid palsy, there are still other ...
levator scapulae, the upper fibers of the trapezius Scapular depression [12] The scapula is lowered from elevation. The scapulae may be depressed so that the angle formed by the neck and shoulders is obtuse, giving the appearance of "slumped" shoulders. [citation needed] pectoralis minor, lower fibers of the trapezius, subclavius, latissimus dorsi
There are two rhomboid muscles on each side of the upper back: [1] [2] [3] Rhomboid major muscle; Rhomboid minor muscle; The large rhombus-shaped muscle, located under the trapezius muscle, in the upper part of the thoracic region of the back, and the small muscle, in the same way, participate in the movement of the scapula. [4]
The superficial group, also known as the appendicular group, is primarily associated with movement of the appendicular skeleton. It is composed of trapezius, latissimus dorsi, rhomboid major, rhomboid minor and levator scapulae. It is innervated by anterior rami of spinal nerves, reflecting its embryological origin outside the back.