Pratical Muscle List (Anterior Trunk)

Pectoralis Major (flextion & medial rotation)

Pectoralis Minor (protraction of scapula)

External Intercostals (elevate rib cage)

Internal Intercostals (forced exhalation)

Diaphragm (main muscle for quiet breathing)

Rectus Abdominus (trunk flextion)

Linea Alba

Tendinous Inscriptions

External Abdominal Oblique

Internal Abdominal Oblique

Transverus Abdominus (tightens abdomen)

Lastissimus Dorsi (extends arm)

Trapezius (retraction of scapula)

Levator Scapulae (extends scapula)

Rhomboids (retraction of the scapula)

Serratus Anterior (protraction of the scapula)

Errector Spine Group

keeps spine straight

External Muscle

fibers run as if we’re putting hands in pockets. muscle is superficial

Internal Muscle

fibers run perpendicular to external muscle. muscle is deep

Abdominal Oblique

trunk rotation

Agonist

primer mover of the group