Upper Limb Flashcards
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Acromial End of Clavicle
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Sternal End Of Clavicle
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Conoid Tubercle - on acromial end
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Impression for costoclavicular ligament - sternal end
Scapula
bridge between clavicle and humerus
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Glenoid cavity/fossa
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Infraglenoid tubercle
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Supraglenoid tubercle
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Suprascapular notch
What runs in the suprascapular notch?
The suprascapular artery & nerve
The superior transverse ligament of scapula covers the notch, the artery is above, the nerve is below
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Neck of scapula
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Spine of Scapula
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Acromian
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Coracoid process
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Superior Angle of Scapula
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Inferior Angle of Scapula
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Lateral border of scapula
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Medial border of scapula
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Subscapular fossa
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Infraspinous fossa
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Supraspinous fossa
The arm can be elevated how many degrees without movement of the scapula?
30 degrees
the act of fully elevating the arm requires abduction at which joints?
120º occurs at the glenohumeral joint and 60º from scapular rotation
Sternoclavicular Joint
saddle joint (morphology); ball and socket (functional) only bony articulation between the upper limb and the thorax
Acromioclavicular joint
Plane Synovial joint
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Coracoclavicular ligament
(coracoid process to clavicle)
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Coracoacromial ligament
(coracoid process to acromian)
Red circle
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Acromioclavicular ligament
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Acromioclavicular joint
Movements of scapula at acromioclavicular joint
Elevation/Depression
Protraction/Retraction
Rotation
Glenohumeral joint
Ball & Socket joint
Allows for:
Medial/Lateral Rotation
Abduction/Adduction
Flexion/Extension
Joint
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Glenohumeral joint
glenoid labrum
a fibrocartilaginous ring surrounding the glenoid cavity
Stabilizing ligaments originate from here
7 & 6
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7 = Glenoid labrum
6 = Glenoid cavity
Most common direction of humeral dislocation
Inferiorly - weakest because not reinforced by the rotator cuff muscles or coracoacromial arch
Called anterior dislocation
2
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Superior, Middle, & Inferior Glenohumeral ligaments
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Coracohumeral ligament
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Transverse humeral ligament
Transverse humeral ligament
holds the long tendon of the biceps brachii between within the bicipital groove
Coracoacromial ligament
reinforces superior border of glenohumeral joint preventing superior dislocation
Axio-appendicular muscles
Extrinsic muscles attaching the upper limb to the thorax
Anterior: Pectoralis major, Pectoralis minor, Subclavius, Serratus anterior
Posterior: Trapezius, Levator Scapulae, Rhomboideus major and minor, Latissimus dorsi
Scapulohumeral muscles
Intrinsic muscles connecting the scapula to the humerus
Deltoid, Teres major, Rotator Cuff (Supraspinatus, Infraspinatus, Teres minor, Subscapularis)
Triangular Space
Contains the scapular circumflex artery
Lateral border—long head of the triceps
Superior border—teres minor
Inferior border—teres major
Quadrangular space
Contains axillary nerve and posterior humeral circumflex artery
Lateral border—humerus
Medial border—long head of triceps brachii
Superior border—teres minor
Inferiorly—teres major
Fracture of the surgical neck of the humerus can cause
damage to the contents of the quadrangular space, including the axillary nerve and posterior humeral circumflex artery
severance of the axillary nerve leads to paralysis and eventually atrophy of the deltoid (and teres minor)
Thyrocervical trunk
Dorsal scapular a. (can be a branch of the transverse cervical)
Suprascapular a. (can be a separate branch from the subclavian a.)
Axillary artery
As subclavian passes under the clavicle it changes names to the axillary. Three parts defined by their position relative to pectoralis minor and named based on how many arteries originate from them
Part 1 of Axillary a.
Proximal to pectoralis minor
Gives off Superior thoracic a.
Part 2 of Axillary a.
Deep (posterior) to pectoralis minor
Gives off:
Thoracoacromial trunk - Acromial, pectoral, clavicular, and deltoid branches
Lateral thoracic a.
Part 3 of Axillary a.
Distal to pectoralis minor
Gives off:
Anterior circumflex humeral a.
Posterior circumflex humeral a.
Subscapular a. - Circumflex scapular a. & Thoracodorsal a.
Cephalic vein
drains into axillary v.
travels in deltopectoral groove
Basilic vein
drains into axillary v.
passes through basilic hiatus
Median cubital vein
connects cephalic and basilic veins in cubital fossa