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38 Cards in this Set
- Front
- Back
SC joint ligaments
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Anterior and Poster SC ligaments
interclavicular ligament costoclavicular ligament |
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costoclavicular ligament
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connects clavicle to rib #1
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Sternoclavicular joint
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Btw Clavicle and Manubrium of Sternum
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Acromialclavicular joint
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Btw Clavicle and Acromion of scapula
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AC joint ligaments
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Acromioclavicular ligament
coracoacromial ligament coracoclavicular ligaments |
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2 Coracoclavicular ligaments
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Trapezoid (lat) and Conoid (med) unite coracoid process and clavicle
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1st degree AC injury
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"sprain"
stretch or minor tear of AC ligament but still intact |
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2nd degree AC injury
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"subluxation"
rupture of AC ligament |
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3rd degree AC injury
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"dislocation" or shoulder separation
coracoclavicular ligaments torn; shoulder separates away from clavicle |
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Pectoralis Major origin
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Clavicular and Sternocostal heads
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Pectoralis Major insertion
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bicipital groove of humerus
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Pectoralis Major action
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adduction and medial rotation of arm, flexion of arm at shoulder joint
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Pectoralis Major nerves
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medial and lateral pectoral nerves
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pectoralis minor origin
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ribs 3-5
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pectoralis minor insertion
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coracoid process of scapula
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pectoralis minor action
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stabilize scapula against thoracic wall; minor respiratory function
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pectoralis minor innervation
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medial pectoral nerve
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Transitions of subclavian artery
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after it passes rib #1 becomes axillary artery; after it passes teres major becomes brachial artery.
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Axillary Artery function
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provides vascular supply to pectoral girdle and shoulder regions
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1st part of axillary artery
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Before pectoralis minor; has one branch: superior thoracic artery
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2nd part of axillary artery
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Found beneath pec minor
2 branches: thoracoacromial trunk and lateral thoracic artery |
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3rd part of axillary artery
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after pec minor
3 branches: subscapular and anterior and posterior humeral circumflex |
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Subscapular Artery
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largest branch of axillary artery; supplies muscles around scapula, gives rise to thoracodorsal artery and scapular circumflex artery
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Anterior and Posterior Humeral Circumflex arteries
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help vascularize humerus and surrounding muscles. Posterior is larger and passes through quadrangular space.
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6 branches of the axillary artery
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superior thoracic artery
thoracoacromial artery lateral thoracic artery subscapular artery anterior and posterior humeral circumflex arteries |
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5 regions of the brachial plexus
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roots, trunks, divisions, cords, branches
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5 Roots of Brachial Plexus
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Formed by ventral rami of C5 - T1
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3 Trunks of Brachial Plexus
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C5 and C6 form superior trunk
C7 forms middle trunk C8 and T1 form inferior trunk |
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2 divisions of Trunks of Brachial Plexus
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Anterior - form nerves that innervate flexor muscles
Posterior - form nerves that innervate extensor muscles |
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Anterior Divisions in Brachial Plexus
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form nerves that innervate flexor muscles
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Posterior Divisions in Brachial Plexus
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Form nerves that innervate extensor muscles
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3 Cords of Brachial Plexus
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Lateral
Medial posterior |
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Lateral cord of Brachial Plexus
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formed from anterior divisions of superior and middle trunks
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Medial Cord of Brachial Plexus
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formed from anterior division of inferior trunk
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Posterior Cord of Brachial Plexus
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formed from posterior divisions of all 3 trunks
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Major branches of lateral cord of brachial plexus
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Musculocutaneous and lateral root of median nerve
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Major branches of posterior cord of brachial plexus
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radial and axillary nerves
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Major branches of medial cord of brachial plexus
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ulnar nerve and medial root of median nerve
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