Lecture 5 - GLENOHUMERAL JOINT Flashcards
(18 cards)
What are the 4 rotator cuff muscles?
- Infraspinatus
- Supraspinatus
- Subscapularus
- Teres Minor
What degree does the glenohumeral joint abduct, adduct, flex, extend, internally and externally rotat ?
90 - 95 degrees abduction 0 degrees adduction 40 - 60 degrees of extension 90 to 100 degrees of flexion 70 to 90 degrees of internal & external rotation
OINA of Pectoralis Major?
O - medial 1/2 of clavicle, coastal cartilage first 6 ribs
I - lateral lip of bicipital groove
N - medial & lateral perctoral nerve
A - internal rotation, adduction, horizontal adduction
OINA of Latissimus Dorsi?
O - posterior ilium, spinous processes of sacrum to T6
I - floor of bicipital groove
N - thoracodorsal nerve
A - adduction, internal rotation, extension
OINA of Teres Major?
O - inferior angle of scapula
I - medial lip of bicipital groove
N - lower subscapular nerve
A - adduction, internal rotation, extension
OINA of Deltoid?
O - lateral 1/3 of clavicle, acromion and spine of scapula
I - deltoid tuberosity
N - axillary nerve
A - Anterior = flexion
Middle = abduction
Posterior = extensionOINA of Coracobrachilis?
O - coracoid process
I - middle 1/3 of humerus
N - musculocutaneous nerve
A - flexion
OINA of Subscapularis?
O - subscapular fossa
I - lesser tubercle
N - upper & lower subscapular nerve
A - internal rotation
OINA of Supraspinatus?
O - supraspinatus fossa
I - greater tubercle
N - suprascapular nerve
A - abduct to 30 degrees (middle deltoid past 30 degrees)
OINA of Infraspinatus?
O - infraspinatus fossa
I - greater tubercle
N - suprascapular nerve
A - lateral/external rotation
OINA of Teres Minor?
O - lateral border of scapula
I - greater tubercle
N - axillary nerve
A - lateral/external rotation
Which 3 muscles insert into the greater tubercle?
- Infraspinatus
- Supraspinatus
- Teres Minor
Which 2 muscles laterally/ externally rotate the humerus?
Infraspinatus and Teres Minor
The synergist to coracobracialis in the action of flexion?
Anterior Deltoid
The synergist to latissimus dorsi in the action of extension?
Teres Major and Posterior Deltoid
The synergist to middle deltoid in the action of abduction?
Supraspinatus (30 degrees)
The synergist to latissimus dorsi in the action of adduction?
Pectoralis Major and Teres Major
Which muscles internally rotate the humerus?
Pectoralis Major
Latissimus Dorsi
Teres Major
Subscapularis
