Muscles of the Upper Extremity

Chapter 9

What muscle is this?

Supraspinatus Muscle

What is the origin and insertion of the Supraspinatus Muscle?

Supraspinous Fossa of the Scapula, Greater Tuberosity of the Humerus

The Supraspinatus muscle is one of 4 muscles that make up the _________ _____

Rotator Cuff

What is the action this muscle has on the shoulder joint?

Shoulder Abduction

What muscle is this?

Infraspinatus Muscle

What is the infraspinatus muscle a part of?

The rotator cuff

What is the action of the infraspinatus muscle on the shoulder joint?

Rotation of the arm at the shoulder

What is the origin and insertion of the infraspinatus muscle?

Infraspinous Fossa of the Scapula, Greater Tubercle of the Humerus

What muscle is this?

Subscapularis Muscle

What is the subscapularis muscle a part of?

Rotator Cuff

What is the origin and insertion of the subscapularis muscle?

Subscapular Fossa of Scapula, Lesser Tubercle of Humerus

What is the action the subscapularis muscle has on the shoulder joint?

Rotation of the Humerus

What muscle is this?

Teres Minor Muscle

Teres Minor muscle is one of four muscles that make up the _______ _____

Rotator Cuff

What is the origin and insertion of the teres minor muscle?

Lateral Border of the Posterior Side of Scapula, Greater Tubercle of the Humerus

What action does the teres minor muscle have on the shoulder joint?

Abduction and Extension of the shoulder joint

What muscle is this?

Teres Major Muscle

What are the 2 origins and 1 insertion of the teres major muscle?

Posterior Surface of the Inferior Angle of Scapula and Lateral Border of the Scapula, Intertubercular Groove of the Humerus

What are the 3 actions the teres major muscle has on the shoulder joint?

Abduction, Extension, and Rotation of the Humerus

What muscle is this?

Deltoid Muscle

What are the three parts of the Deltoid Muscle?

Anterior, Middle, and Posterior

What are the 3 origins and 1 insertion of the deltoid muscle?

Lateral Third of the Clavicle and Acromion of the Scapula and Spine of the Scapula, Deltoid Tuberosity of Humerus

What is the main action the deltoid muscle has on the shoulder joint?

Arm Abduction

What muscle is this?

Biceps Brachii Muscle

What are the 2 origins and 1 insertion of the biceps brachii muscle?

Supraglenoid Tubercle and Coracoid Process of the Scapula, Radial Tuberosity

What are the 2 actions the biceps brachii muscle has on the elbow joint?

Flexion and Supination

What muscle is this?

Triceps Brachii Muscle

What are the 3 origins and 1 insertion of the triceps brachii muscle?

Infraglenoid Tubercule of the Scapula and Superior and Inferior Surfaces of the Radial Groove of Humerus, Olecranon of Ulna

What is the action the triceps brachii has on the elbow joint?

Extension of Forearm

What muscle is this?

Pectoralis Major Muscle

What are the 3 origins and 1 insertion of the pectoralis major muscle?

Medial Third of Clavicle and Anterior Surface of the Sternum and Superior Six Costal Cartilages, Intertubercular Groove of Humerus

What are the 3 actions the pectoralis major muscle has on the shoulder joint?

Adduction, Flexion, and Transversely Rotation of the Arm

What muscle is this?

Latissimus Dorsi Muscle

What are the 4 origins and 1 insertion of the latissimus dorsi muscle?

Spinous Process of the Vertebrae and Thoracolumbar Fascia and Iliac Crest of Scapula and Inferior 3-4 Ribs, Intertubercular Groove of Humerus

What are the 3 actions the latissimus dorsi muscle has on the shoulder joint?

Extension, Addiction, and Rotation