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28 Cards in this Set
- Front
- Back
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Synovial joint between the manubrium of the sternum ande medial end of the clavicle
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Sternoclavicular Joint
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the major parts of the scapula
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acromion, coracoid process, inferior angle, spinous process and glenoid fossa
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a synovial joint between the lateral end of the clavicle and the acromion of the scapula
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acromioclavicular joint (AC)
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the ligament that supports the acromioclavicular (ac) joint
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coracoclavicular ligament
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an injury to the fibrous capsule of the AC joint
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shoulder separation
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what is a grade 1 shoulder separation?
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a simple sprain of the fibrous capsule of the AC joint
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what is a grade 2 shoulder separation?
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a subluxation(partial dislocation) of the AC joint
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what is a grade 3 shoulder separation?
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a dislocation of the AC joint, acticular surfaces of the joint lose all contact b/c of damage to the fibrous capsule and the coracoclavicular ligament
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what are the major parts of the proximal end of the humerus?
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head, greater and lesser tuberosities and surgical neck
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what is the name of the synovial joint between the glenoid fossa of the scaupla and the head of the humerus?
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the shoulder joint
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what kind of configuration is the shoulder joint and what kind of movements does it provide for?
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ball and socket. flexion, extension, internal rotation, external rotation, abdction, and adduction of the arm.
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what is a shoulder dislocation?
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dislocation of the shoulder joint.
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why is the shoulder joint subject to dislocation?
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1. the small size of the glenoid fossa relative to the head of the humerus
2. the laxity of the inferior aspect of the capsule of the shoulder joint. |
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what is the major nerve most likely to be injured by a shoulder dislocation?
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the axillary nerve.
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what is the most commonly fractured bone?
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the clavicle.
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abduction and adduction of the arm involved the movements of which joints?
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sternoclavicular, acromioclavicular and shoulder joints.
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Describe Trapezius.
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it can shrug the shoulder and is one of the two prime movers for lateral rotation of the scapula; it is innervated by the spinal part of the accessory nerve.
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describe serratus anterior.
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most powerful protractor of the shoulder and one of the two prime movers for lateral rotation of the scapula; innervated by the long thoracic nerver
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what are the muscles of the rotator cuff?
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supraspinaturs, infraspinatus, teres minor and subscapularis
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what is the rold of the rotator cuff?
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stabilze the shoulder joint by securely keeping the head of the humerus in close articulation with the glenoid fossa of the scapula
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describe supraspinatus.
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it initiates abduction of the arm from the anatomical positin and is innervated by the suprascapular nerver (c5 and c6)
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describe infraspinatus.
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rotates the arm externally and is innervated by the suprascapular nerver (c5 and c6)
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describe teres minor.
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rotates the arm exterally and is innervated by the axillary nerve (c5 and c6)
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describe subscapularis.
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rotates the arm internally and is innervated by the upper and lower subscapular nervers.
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describe deltoid.
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the most powerful abductor of the arm at the shoulder joint; it can also flex, extent, internally rotate and externally rotate the arm; innervated by the axillary nerver (c5 and c6)
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what happens during arm abduction?
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supraspinatus and deltoid abduct the arm at the shoulder joint and as trapezius and serratus anterior abduct the arm by laterally rotating the scapula
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describe pectoralis major
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it can flex and adduct the arm; it is innervated by the medial and lateral pectoral nerves
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describe latissimus dorsi.
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it can extend, adduct, and internally rotate the arm; it is innervated by the thracodorsal nerve.
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