<prompt> Retraction of scapula is by which fibreUpper fibre of trapeziusMiddle fibre of trapeziusLower fibre of trapeziusUpper and Lower fibre of trapezius  <response>: Ans. B Middle fibre of trapezius Retraction of scapula is done for middle fibres of trapezius musclesMuscles of Scapular Stabilization Trapezius: Retraction M Elevation S Depression I Upward rotation S, M Rhomboid--retraction Levator scapular--elevation Pectoralis major--protraction Serratus anterior--Protraction 