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10 Cards in this Set
- Front
- Back
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Transverse Thoracic
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Innervation: Intercostal n.
Action: Weakly depresses ribs |
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Subcostal
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Innervation: Intercostal n.
Action: Same manner as internal intercostal muscles |
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Levator costarum
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Innervation: Posterior rami of C8-T11 nerves
Action: Elevate ribs |
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Serratus posterior inferior
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Innervation: 9th-11th inercostal n.; subcostal (T12) n.
Action: Depress ribs |
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Serratus posterior superior
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Innervation: 2nd-5th intercostal n.
Action: Elevate ribs |
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Intercostal Muscles (External, Internal and Innermost)
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Innervation: Intercostal n.
Action: elevate ribs during forced inspiration; interosseus part depresses ribs and interchondral part elevates ribs during forced expiration |
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Pectoralis major
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Innervation: Lateral & Medial pectoral nerves
Action: adducts and medially rotates humerus; draws scapula anteriorly and inferiorly; clavicular head flexes humerus; sternocostal head extends humerus from flexed position |
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Pectoralis minor
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Innervation: Medial pectoral nerve
Action: stabilizes scapula by drawing it inferiorly and anteriorly against thoracic wall |
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Subclavius
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Innervation: nerve to subclavius
Action: Anchors and depresses clavicle |
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Serratus anterior
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Innervation: Long thoracic n.
Action: Protracts scapula and holds it against thoracic wall; rotates scapula |
