Erector spinae muscles

Deep back muscles

Overview of the back muscles

Levatores costarum muscles

The organisation of muscles in layers is a key aspect of human anatomy and functional movement. Superficial Layer • Location: Closest to the skin. • Function: • Primarily responsible for large, gross movements. • Involved in forceful and dynamic activities, such as lifting, pushing, or running. • Examples: • Upper Body: Trapezius, pectoralis major, deltoids, latissimus dorsi. • Lower Body: Gluteus maximus, quadriceps, hamstrings. Intermediate Layer • Location: Beneath the superficial layer, ofte