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7 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Subclavius |
ORIGIN:Rib 1 INSERTION: Clavicle ACTION: Depresses and moves clavicle anteriorly and helps stabilize pectoral girdle INNERVATION: Subclavian nerve |
ANTERIOR THORACIC MUSCLE |
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Pectoralis minor |
ORIGIN:Ribs 2–5, 3–5, or 2–4. INSERTION: Coracoid process of scapula ACTION:Abducts scapula and rotates it downward. RMA: Elevates ribs 3–5 during forced inhalation when scapula is fixed INNERVATION: Medial pectoral nerve. |
ANTERIOR THORACIC MUSCLE |
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Serratus anterior |
ORIGIN: Ribs 1–8 or 1–9 INSERTION: Vertebral border and inferior angle of scapula ACTION: Abducts scapula and rotates it upward. RMA: Elevates ribs when scapula is stabilized. Known as “boxer’s muscle” because it is important in horizontal arm movements such as punching and pushing INNERVATION: Long thoracic nerve |
ANTERIOR THORACIC MUSCLE |
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Trapezius |
ORIGIN: Superior nuchal line of occipital bone, ligamentum nuchae, and spines of C7–T12 INSERTION: Clavicle and acromion and spine of scapula ACTION: Superior fi bers upward rotate scapula; middle fi bers adduct scapula; inferior fi bers depress and upward rotate scapula; superior and inferior fi bers together rotate scapula upward; stabilizes scapula. RMA: Superior fi bers can help extend head INNERVATION: Accessory (XI) nerve and cervical spinal nerves C3–C5 |
POSTERIOR THORACIC MUSCLE |
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Levator scapulae |
ORIGIN: Transverse processes of C1–C4. INSERTION: Superior vertebral border of scapula. ACTION: Elevates scapula and rotates it downward INNERVATION: Dorsal scapular nerve and cervical spinal nerves C3–C5 |
POSTERIOR THORACIC MUSCLE |
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Rhomboid major |
ORIGIN: Spines of T2–T5 INSERTION: Vertebral border of scapula inferior to spine ACTION: Elevates and adducts scapula and rotates it downward; stabilizes scapula INNERVATION: Dorsal scapular nerve |
POSTERIOR THORACIC MUSCLE |
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Rhomboid minor |
ORIGIN: Spines of C7–T1. INSERTION: Vertebral border of scapula superior to spine. ACTION: Elevates and adducts scapula and rotates it downward; stabilizes scapula. INNERVATION: Dorsal scapular nerve. |
POSTERIOR THORACIC MUSCLE |
