Shoulders + Chest Flashcards
Shoulder aka pectoral girdle is made up of what 3 bones?
Scapula, Clavicle, humerus
Scapula
- Top called superior angle, bottom called inferior angle.
- Infraspanatus Fassa,
- Subscapular Fassa
- Glenoid Fassa
**Pectoralis Minor**
O: Anterior surface of 3rd/ 4th/ 5th rib
I: Corcoid process of scapula
A: Draws scapula anteriorly and downward
Serratus Anterior
O: Outer surface of first 8 or 9 ribs
I: Entire length of anterior surface of the vertebral border of scapula
A: Stabilizes, abducts, and rotates scapula upward. Holds scapula against chest wall
Pectoralis Major
O: Medial half of clavicle, sternum, costal cartilage of first 6 ribs
I: Greater tubricle of humerus
A: Flexes, adducts, and medially rotates arm
Deltoid Anterior
O: Lateral 3rd of Clavicle
I: Deltoid Tuberosity
A: Flex and medially rotates the arm
Deltoid Medial or Lateral
O: Acromium process
I: Deltoid tuberosity
A: Abducts the arm
What is the most freely movable joint in body but most unstable?
Shoulder joint
Supraspinatus
O: Supraspinatus Fassa
I: Greater tubricle of humerus
A: Abduction
Infraspinatus
O: Infraspinatus Fassa
I: Greater tubricle of humerus
A: Lateral rotation and extension of humerus
Subscapularis
O: Scapularis Fassa
I: Lesser tubricle of humerus
A: Medial rotation adduction of humerus
Teres Minor
O: Upper 2/3 of axillary border of scapula
I: Greater tubricle of humerus connected to backside of humerus
A: Lateral rotation extension of humerus
