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20 Cards in this Set

  • Front
  • Back
Sternum
Long flat bone; composed of the manubrium, body and xiphoid process
True ribs
Ribs 1-7; articulate with sternum directly
False ribs
Ribs 8-10; articulate to costal cartilages of the ribs above
Floating ribs
Ribs 11 and 12; articulate with vertebrae only
Capsule (ligament)
Clavicle and manubrium; allows elevation, depression, protraction, retraction, and circumduction
Sternoclavicular (ligament)
Clavicle and manubrium; Consists of anterior and posterior ligaments
Interclavicular (ligament)
Between both clavicles; Connects two sternoclavicular joints
Costoclavicular (ligament)
Clavicle to first rib; Anchors clavicle to first rib
First sternocostal (joint)
First rib to manubrium; Allows no movement at this joint
Radiate sternocostal (joint)
Ribs 2-7 with sternum; Permit some gliding or sliding movement at these synovial plane joints
Costochondral cartilage joints
Costal cartilage to rib; Allow no movement at these joints
Interchondral joints
Between costal cartilages; Allow some gliding movement
External intercostal muscles
Origin-Inferior border of rib

Insertion-Superior border of rib below

Innervation-Intercostal nerve

Actions-Elevate ribs
Internal intercostal muscles
Origin-Inferior border of rib

Insertion-Superior border of rib below

Innervation-Intercostal nerve

Actions-Elevate ribs (upper four and five); other depress ribs
Innermost intercostal muscles
Origin-Inferior border of rib

Insertion-Superior border of rib below

Innervation-Intercostal nerve

Actions-Probably elevate ribs
Transversus thoracis muscle
Origin-Posterior surface of lower sternum

Insertion-Internal surface of costal cartilages 2-6

Innervation-Intercostal nerve

Actions-Depress ribs
Subcostal muscles
Origin-Internal surface of lower rib near their angles

Insertion-Superior borders of second or third ribs below

Innervation-Intercostal nerve

Actions-Elevate ribs
Levator costarum muscle
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
Internal thoracic artery
Arises from subclavian and terminates by dividing into superior epigastric and musculophrenic arteries
Intercostal arteries
Anterior and posterior segments that arise from internal thoracic and aorta, respectively, and anastomose