Muscles between pectoral appendage & vertebral column of thorax

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Last updated 1:20 AM on 10/13/26
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8 Terms

1
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<p>Insertion: Greater tubercule of humerus (short tendon)</p><p>Action: Prime mover of arm flexion; adducts &amp; internally rotates humerus </p><p>Origin: Clavicle, sternum, cartilage of first 6 ribs</p>

Insertion: Greater tubercule of humerus (short tendon)

Action: Prime mover of arm flexion; adducts & internally rotates humerus

Origin: Clavicle, sternum, cartilage of first 6 ribs

Pectoralis Major

2
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<p>Origin: Ribs 3-5</p><p>Insertion: Coracoid process of scapula</p><p>Action: Protracts &amp; depresses scapula</p>

Origin: Ribs 3-5

Insertion: Coracoid process of scapula

Action: Protracts & depresses scapula

Pectoralis Minor

3
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<p>Insertion: Proximal humerus</p><p>Action: Prime mover of arm extension; adducts &amp; internally rotates humerus</p><p>Origin: Lower 3-4 ribs, inferior spine, iliac crest</p>

Insertion: Proximal humerus

Action: Prime mover of arm extension; adducts & internally rotates humerus

Origin: Lower 3-4 ribs, inferior spine, iliac crest

Latissimus Dorsi

4
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<p>Origin: Medial aspect of superior nuchal line, external occipital protuberance, ligamentum nuchae, spinous processes C7- T12</p><p>Insertion: Lateral 1/3 of clavicle, acromion, spine of scapula</p><p>Action: Elevate, depress, retract (adduct) scapula; hyperextend neck; stabilize shoulder</p>

Origin: Medial aspect of superior nuchal line, external occipital protuberance, ligamentum nuchae, spinous processes C7- T12

Insertion: Lateral 1/3 of clavicle, acromion, spine of scapula

Action: Elevate, depress, retract (adduct) scapula; hyperextend neck; stabilize shoulder

Trapezius

5
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<p>Origin: Anterior surface of ribs 1-8</p><p>Insertion: Anterior surface of medial border of scapula</p><p>Action: Protracts (abducts) scapula; rotates; keep medial border agasint thoracic wall against</p>

Origin: Anterior surface of ribs 1-8

Insertion: Anterior surface of medial border of scapula

Action: Protracts (abducts) scapula; rotates; keep medial border agasint thoracic wall against

Serratus Anterior (Ventralis)

6
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<p>Origin: Spinoous process T2-T12</p><p>Insertion: Medial border of scapula (below rhomboid minor)</p><p>Action: Elevates &amp; adducts scapula</p>

Origin: Spinoous process T2-T12

Insertion: Medial border of scapula (below rhomboid minor)

Action: Elevates & adducts scapula

Rhomboid Major

7
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<p>Origin: Spinous process C7-T1</p><p>Insertion: Medial border of scapula (above rhomboid major)</p><p>Action: Elevates &amp; adducts scapula </p>

Origin: Spinous process C7-T1

Insertion: Medial border of scapula (above rhomboid major)

Action: Elevates & adducts scapula

Rhomboid Minor

8
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Levator Scapulae