shoulder Flashcards
Pectoral girdle is formed by
Clavicle and scapula
What are the articulations of the pectoral girdle?
Sternoclavicular (SC) joint
Acromioclavicular (AC) joint
Glenohumeral (GH) joint
The shoulder girdle is only attached to the axial skeleton at which joint?
Sternoclavicular
Clavicular mvt at the Sternoclavicular joint
Elevation/depression
Protraction/retraction
Rotation (also occurs at acromioclavicular joint)
Sternoclavicular joint is the ___ end of the clavicle
Sternal (triangular end)
The acromioclavicular joint is the ____ end of the clavicle?
Acromial (flatter end)
Ratio of GH joint to shoulder girdle motion
2:1
0-90 GH (60) + SC (30)
90-180 GH (60) + AC (30)
Veins of shoulder complex
Cephalic (lat arm) (connects to axillary vein)
Basilic (med arm) (connects/becomes axillary vein)
Axillary (becomes subclavian vein)
What is this?
Vein pathway
Ant musc of shoulder
Pectoralis major
Pectoralis minor
Subclavius
Serratus anterior
Pectoral is major has two parts
Sternocostal portion
Clavicular portion
Pec maj actions
Add
IR
Horizontal add
Flex arm
Pec minor actions
Accessory musc of ventilation (pectoral girdle is stable)
Depression
Downward rotation
Protraction with serratus ant
Raises ribs
Subclavius actions
Stabilizes clavicle
Pulls medially
Depression of shoulder girdle
Serratus ant actions
Accessory musc of ventilation
Protracts scapula (throwing punch)
Lower fibers rotate scapula upward
Post musc shoulder
Trapezius
Latissimus dorsi
Levator scapulae
Rhomboid maj and min
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
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
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
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
