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20 Cards in this Set
- Front
- Back
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Sternum
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Long flat bone; composed of the manubrium, body and xiphoid process
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True ribs
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Ribs 1-7; articulate with sternum directly
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False ribs
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Ribs 8-10; articulate to costal cartilages of the ribs above
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Floating ribs
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Ribs 11 and 12; articulate with vertebrae only
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Capsule (ligament)
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Clavicle and manubrium; allows elevation, depression, protraction, retraction, and circumduction
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Sternoclavicular (ligament)
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Clavicle and manubrium; Consists of anterior and posterior ligaments
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Interclavicular (ligament)
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Between both clavicles; Connects two sternoclavicular joints
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Costoclavicular (ligament)
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Clavicle to first rib; Anchors clavicle to first rib
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First sternocostal (joint)
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First rib to manubrium; Allows no movement at this joint
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Radiate sternocostal (joint)
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Ribs 2-7 with sternum; Permit some gliding or sliding movement at these synovial plane joints
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Costochondral cartilage joints
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Costal cartilage to rib; Allow no movement at these joints
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Interchondral joints
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Between costal cartilages; Allow some gliding movement
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External intercostal muscles
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Origin-Inferior border of rib
Insertion-Superior border of rib below Innervation-Intercostal nerve Actions-Elevate ribs |
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Internal intercostal muscles
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Origin-Inferior border of rib
Insertion-Superior border of rib below Innervation-Intercostal nerve Actions-Elevate ribs (upper four and five); other depress ribs |
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Innermost intercostal muscles
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Origin-Inferior border of rib
Insertion-Superior border of rib below Innervation-Intercostal nerve Actions-Probably elevate ribs |
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Transversus thoracis muscle
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Origin-Posterior surface of lower sternum
Insertion-Internal surface of costal cartilages 2-6 Innervation-Intercostal nerve Actions-Depress ribs |
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Subcostal muscles
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Origin-Internal surface of lower rib near their angles
Insertion-Superior borders of second or third ribs below Innervation-Intercostal nerve Actions-Elevate ribs |
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Levator costarum muscle
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Origin-Transverse processes of C7 and T1-11
Insertion-Subjacent rubs between tubercle and angle Innervation-Dorsal primary rami of C8-T11 Actions-Elevate ribs |
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Internal thoracic artery
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Arises from subclavian and terminates by dividing into superior epigastric and musculophrenic arteries
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Intercostal arteries
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Anterior and posterior segments that arise from internal thoracic and aorta, respectively, and anastomose
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