shoulder Flashcards by Alannah Ruiz

Pectoral girdle is formed by

Clavicle and scapula

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What are the articulations of the pectoral girdle?

Sternoclavicular (SC) joint

Acromioclavicular (AC) joint

Glenohumeral (GH) joint

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The shoulder girdle is only attached to the axial skeleton at which joint?

Sternoclavicular

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Clavicular mvt at the Sternoclavicular joint

Elevation/depression

Protraction/retraction

Rotation (also occurs at acromioclavicular joint)

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Sternoclavicular joint is the ___ end of the clavicle

Sternal (triangular end)

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The acromioclavicular joint is the ____ end of the clavicle?

Acromial (flatter end)

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Ratio of GH joint to shoulder girdle motion

2:1

0-90 GH (60) + SC (30)

90-180 GH (60) + AC (30)

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Veins of shoulder complex

Cephalic (lat arm) (connects to axillary vein)

Basilic (med arm) (connects/becomes axillary vein)

Axillary (becomes subclavian vein)

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What is this?

Vein pathway

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Ant musc of shoulder

Pectoralis major

Pectoralis minor

Subclavius

Serratus anterior

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Pectoral is major has two parts

Sternocostal portion

Clavicular portion

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Pec maj actions

Add

Horizontal add

Flex arm

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Pec minor actions

Accessory musc of ventilation (pectoral girdle is stable)

Depression

Downward rotation

Protraction with serratus ant

Raises ribs

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Subclavius actions

Stabilizes clavicle

Pulls medially

Depression of shoulder girdle

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Serratus ant actions

Accessory musc of ventilation

Protracts scapula (throwing punch)

Lower fibers rotate scapula upward

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Post musc shoulder

Trapezius

Latissimus dorsi

Levator scapulae

Rhomboid maj and min

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Trapezius actions

Elevation, depression, retraction, upward rotation scapula, head ext

Shrugging shoulder musc

Latissimus dorsi actions

Ext

Add

IR arm

Levator scapulae actions

Elevation

Retraction

Slight downward rotation scapula

Lat neck flex (same side musc cxn)

Rhomboid maj and min actions

Retraction

Elevation

Downward rot scapula

Lat musc shoulder

Deltoid

Teres maj

Rotator cuff:
Supraspinatus

Infraspinatus

Teres minor

Subscapularis

Deltoid actions

Whole: abd

Ant: flex, horiz add (flex), IR

Middle: abd

Post: ext, horiz abd (ext), ER

Teres maj actions

Ext
IR
Add arm

Supraspinatus actions

Abd arm

Stabilize joint

Infraspinatus actions

ER Stabilize joint

Teres min actions

ER Add Ext (some) Stabilizes joint

Subscapularis actions

IR Add Stabilizes joint

What is this?

Quadrangular space

Quadrangular space borders

Med: long head triceps splitting Teres maj/min Sup: Teres min Inf: Teres maj Lat: humerus

What travels through quadrangular space

Axillary nerve Posterior circumflex numeral artery

What is this?

Triangular space

Triangular space borders

Lat: long head triceps Sup: Teres min Inf: Teres maj

Structures in triangular space

Circumflex scapular artery

Brachial plexus mnemonic

Rugby Teams Don’t Cover Bruises

Roots (C5-T1) Trunks (3) Divisions (2) Cords (3) Branches (5)

Branches of lat cord mnemonic (rugby players are)

Long Legged Movers

Lat pectoral nerve Lat root of median nerve Musculocutaneus nerve

Branches of med cord mnemonic (rugby players)

Make Many Moves Using Musc

Med brachial cutaneous nerve Med antebrachial cutaneous nerve Med pectoral nerve Ulnar nerve Med root of median nerve

Branches of post cord (rugby players are)

ULTRA (competitive)

ULTRA

Upper subscapular nerve Lower subscapular nerve Thoracodorsal nerve Radial nerve Axillary nerve