Week 6 Flashcards
Humerus landmarks
Head
Surgical neck
anatomical neck
shaft
greater tubercle
lesser tubercle
deltoid tuberosity
bicipital groove
Joint capsules
Thin wall
Outer fibrous membrane
Inner synovial membrane
Attaches around rim of glenoid fossa and anatomical neck of humerus
Anterior deltoid OIA
O: Lateral 1/3 of clavicle
I: Deltoid tuberosity
A: Abduction, flexion, medial rotation and horizontal adduction
Middle Deltoid OIA
O: Acromion process
I: Deltoid tuberosity
A: Abduction
Posterior deltoid OIA
O: Spine of scapula
I: Deltoid tuberosity
A: Abduction, extension, hyperextension, lateral rotation
Pectoralis major OIA
O: Medial 1/3 clavicle, sternum, costal cartilage of ribs 1-6
I: Bicipital groove (lateral lip)
A: Shoulder flexion (first 60 degrees), shoulder extension (first 60 degrees), adduction, medial rotation, horizontal adduction
Latissimus dorsi OIA
O: SPs of T7-L5, posterior sacrum, iliac crest, lower 3 ribs
I: Bicipital groove
A: Shoulder extension, adduction, medial rotation, hyperextension
Teres major OIA
O: Inferior lateral border of scapula
I: Below lesser tubercle, under latissimus dorsi
A: Extension, adduction, and medial rotation
SITS muscles (SIT on a GT)
Supraspinatus
Infraspinatus
Teres Minor
Subscapularis
Supraspinatus OIA
O: Supraspinous fossa
I: Greater tubercle
A: Abduction and stabilizes shoulder
Infraspinatus OIA
O: Infraspinatus fossa
I: Greater tubercle
A: Lateral rotation and horizontal abduction
Teres minor OIA
O: Lateral border of scapula
I: Greater tubercle
A: Lateral rotation and horizontal abduction
subscapularis OIA
O: Subscapular fossa
I: Lesser tubercle
A: Medial rotation of humerus
Coracobrachialis OIA
O: Coracoid process
I: medial humerus halfway down
A: Stabilizes shoulder
