Shoulder Flashcards
Upper Trapezius
PM Elevation/Upward Rotation
If scapula is fixed: assists cervical lateral flexion
Middle Trapezius
PM retraction, assist upward rotation
Lower Trapezius
PM depression/Upward Rotation, assist retraction
Levator Scapulae
PM elevation/downward rotation, assists retraction
Rhomboids (Major/Minor)
PM elevation/retraction/downward rotation
Serratus Anterior
PM Elevation/protraction/upward rotation
interdigiates with External Oblique
Pectoralis Minor
PM depression/protraction/downward rotation
If scapula is fixed: elevates ribs when breathing
Closed Packed Position of Glenohumeral Joint
Abducted to 90 degrees, full ER
GH joint Normal Flexion
180 degrees
GH Joint Normal Abduction
180 degrees
GH Joint Normal ER
90 degrees
GH Joint Normal IR
70 degrees
Labrum
Fibrocartilage that sits on rim of glenoid fossa
deepens the concavity of glenoid fossa
Joint capsule
helps provide stability
inner layer is synovial membrane
Supraspinatus
PM Abduction first 15-30 degrees