The Shoulder Flashcards
What does fossa mean
Cavity or socket
What is the glenoid fossa
Cavity in scapula forming the socket for ball and socket joint
What is shoulder joint
Glenohummoral joint
Head of humorous
Glenoid fossa
Describe the head of the humorous
Greater tubercle on lateral side
Lesser tubercle on medial side
Intertubecular/bicipital groove - between the two
Explain shoulder stability
Shallow Glenoid fossa
Rotation can occur in all planes and axis
Labrum and fibrous joint capsule add stability
Rotator cuff tendons and glenohumoral ligaments adds stability
What is a labrum
A suction cup creating pressure to keep joint in place
What are the tendons that stabilise the joint capsule
Supraspinatus tendon (top)
Subscapularis tendon (anterior side)
Teres minor tendon (posterior side lower)
Infraspinatus tendon (posterior side, higher)
What are the glenohumoral ligaments
Superior, middle (on anterior side), inferior
What are the shoulder joint movements
Saggital plane
- forward flexion to 180
- backwards extension to 60
Frontal plane
- abduction and adduction
Transverse plane
- internal rotation
- external rotation
What are the muscles of the glenohumoral joint
Superficial
Anterior:
pectoralis major
Latisimus dorsi
Teres major
Deltoid
Deep:
Rotator cuff; Supraspinatus, Infraspinatus, Teres minor and subscapularis
Superficial:
Biceps and triceps
What does the pectoralis major do?
Adduction
Horizontal adduction
Internal rotation
What does the latissimus dorsi do
Adduction
Horizontal adduction
External rotation
Extension
What does the Teres major do
Adduction
Horizontal abduction
Extension
Internal rotation
What does the anterior deltoid do
Abduction
Flexion
Horizontal adduction
What does the middle deltoid do
Abduction
