Chest

Question 1

Pec Major

Answer 1

O:
Medial Half of Clavicle
Anterior Surface of Sternum
Costal Cartilage 1-6

I: Humerus

Action: Shoulder Flexion, Medial Rotation, Horizontal Adduction, Extension when already flexed

Synergist: Coracobrachialis, Biceps Brachii, Anterior Deltoid

Antagonist: Latissimus Dorsi, Teres Major, Subscapularis, Posterior Deltoid

Question 2

Pec Minor

Answer 2

O: Anterior surface of ribs 3-5
I: Coracoid process of scapula

Action: Protraction/Abduction of Scapula

Synergist: Serratus Anterior
Antagonist: Rhomboids

Question 3

Serratus Anterior

Answer 3

O: Anterior surface of ribs 1-8
I: Medial/Vertebral Border of Scapula

Action: Protraction/Abduction, Depression of Scapula

Synergist: Pec Minor, Lower Trapezius

Antagonist: Rhomboids, Levator Scapulae

Question 4

Rectus Abdominis

Answer 4

O: Pubic Symphysis, Pubic Crest
I: Xiphoid Process, Costal Cartilage of Ribs 5-7

Action: Flexion of Trunk

Synergist: External Obliques, Internal Obliques

Antagonist: Spinalis, Longissimus