Extrinsic Back Muscles origins and insertions

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Last updated 10:50 PM on 9/23/26
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6 Terms

1
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<p>Trapezius</p>

Trapezius

origin: medial third of superior nuchal line, external occipital protuberance, nuchal ligament, spinous process of c7-t12 vertebrae (medial)

insertion: lateral third of clavicle, acromion and spine of scapula (lateral)

2
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<p>rhomboid minor</p>

rhomboid minor

origin: nuchal ligament; spinous process c7 and t1 vertebrae (medial)

insertion: triangular area at medial end of the scapular spine (lateral)

3
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<p>latissimus dorsi</p>

latissimus dorsi

origin: spinous process of t7-t12, thorocolumbar fasica, iliac crest, and inferior 3 or 4 ribs (medial)

insertion: floor of intertubecular sulcus (groove) of humerous

4
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<p>rhomboid major</p>

rhomboid major

origin: spinous process of t2-t5 (medial)

insertion: medial border of scapula from level of spien to inferior angle (lateral)

5
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<p>levator scapulae</p>

levator scapulae

origin: posterior tubercles of transverse processes of c1-c4 vertebrae

insertion medial border of scapula superior to root of spine

6
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<p>thoracolumbar fascia</p>

thoracolumbar fascia

origin: aponeurosis tendon;; superficial layer attaches to superficial muscles and deep layer surrounds deep muscles