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The rhomboid major is a skeletal muscle of the back that connects the scapula with the vertebrae of the spinal column. [1] It originates from the spinous processes of the thoracic vertebrae T2–T5 and supraspinous ligament; it inserts onto the lower portion of the medial border of the scapula. [2]
The rhomboid muscles (/ ˈ r ɒ m b ɔɪ d /), often simply called the rhomboids, are rhombus-shaped muscles associated with the scapula. There are two rhomboid muscles on each side of the upper back: [ 1 ] [ 2 ] [ 3 ]
rhomboid major, rhomboid minor, trapezius: 2 1 deltoid, clavicular/acromial/scapular spinal parts Upper limb, Shoulder, Right/left clavicle, acromion, spine of scapula: deltoid tuberosity of humerus: primarily posterior circumflex humeral artery: axillary nerve: abducts, flexes, and extends shoulder: latissimus dorsi: 2 1 teres major
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.
Dorsal scapular nerve syndrome can be caused by nerve compression syndrome.A winged scapula is the most common symptom. [7] Shoulder pain may occur. [7] It causes weakness in rhomboid major muscle, rhomboid minor muscle, and levator scapulae muscle. [7]
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Levator scapulae forms part of the latter group together with rhomboid major, rhomboid minor, serratus anterior, and trapezius. The trapezius evolved separately, but the other three muscles in this group evolved from the first eight or ten ribs and the transverse processes of the cervical vertebrae (homologous to the ribs).
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