Axilla and GH Joint
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1
axilla
space below the glenohumoral joint that provides a passageway for neurovascular structures of the arm
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axilla contains _________ structures
vulnerable
high pressure arteries and brachial plexus
high pressure arteries and brachial plexus
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axilla is normally protected by
the adducted arm
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Most individuals have a strong reflex to adduct the arm when
any invasion to the axilla occurs
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Contents of axilla
axillary artery and vein
brachial plexus
fatty tissue
lymph nodes
brachial plexus
fatty tissue
lymph nodes
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the axillary sheath surrounds
axilary artery and brachial plexus
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axillary fat function
cushions and protects all structures
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deepest structure in the axilla is
axillary artery
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the cords of the brachial plexus surround
the axillary artery
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the axillary vein is found
superficially to the neuroarterial bundle
very low pressure blood vessel
very low pressure blood vessel
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axillary lymph nodes filter
lymph collected from upper limbs, back, anterior thoracic wall and mammary regions
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axillary fascia surrounds
each muscle and invaginates to form septae, divinding the region into anterior (flexor) and posterior (extensor) compartments
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Three joints that must move for full shoulder movement
sternoclavicular joint
acromioclavicular joint
glenohumoral joint
acromioclavicular joint
glenohumoral joint
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What structures are involved in the sternoclavicular joint?
sternal end of clavicle
manubrium of sternum
first costal cartilage
articular disc
manubrium of sternum
first costal cartilage
articular disc
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the sternal end of the clavicle articulates with the
manubrium of the sternum
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Acromioclavicular joint structures
acromial end of clavicle
scapula
scapula
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Glenohumoral joint structures
Humerus
Scapula
Glenoid Labrum
Scapula
Glenoid Labrum
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the head of the humerus fits into the
glenoid fossa of the scapula
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the glenohumoral joint is a ______ joint
synovial
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the joint capsule of GH joint is
incomplete
includes a tubular passageway for the biceps tendon
includes a tubular passageway for the biceps tendon
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in the GH joint, capsular ligaments and tendons serve as
extra stabilization
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bursae
synovial fluid-filled sacs that prevent friction
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the glenoid cavity holds _______ of the humoral head, with the glenoid labrum ________
less than 1/3
increasing the concavity by 50%
increasing the concavity by 50%
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the humeral head is dynamically stabilized by the
rotator cuff muscles
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the rotator cuff muscles cover all but the
inferior aspect of the joint, which is primarily stabilized by passive ligamentous structures
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the inferior of the GH joint is stabilized by
the inferior GH ligament complex
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