Trapezius
stabilizes, raises, retracts, and rotates scapula; secondary: extends head
extends, adducts, and medially rotates arm
protracts and rotates scapula superiorly and laterally (“boxer’s muscle”)
draws scapula anteriorly and inferiorly
stabilize scapula
Latissimus dorsi
Serratus anterior
Pectoralis minor
Rhomboids (major and minor)
External intercostals
prime muscle of inspiration (flattens on contraction)
depresses ribs for forced expiration
raises ribs for inspiration
Internal intercostals
Diaphragm