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The trapezius muscle has three zones:
1) The upper trapezius has fibers that run up and down. It's easy to imagine these are responsible for holding the scapula in position at rest and lifting it when the arm moves.
2) The mid-trapezius has muscle fibers that run side to side. This portion controls the scapula while it rotates outward, creating a pivoting point around which it rotates.
3) The lower trapezius assists in rotating the scapula as the arm reaches upward.
1) The upper trapezius has fibers that run up and down. It's easy to imagine these are responsible for holding the scapula in position at rest and lifting it when the arm moves.
2) The mid-trapezius has muscle fibers that run side to side. This portion controls the scapula while it rotates outward, creating a pivoting point around which it rotates.
3) The lower trapezius assists in rotating the scapula as the arm reaches upward.
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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.