<prompt> Winging of scapula is due to paralysis of FMGE Dec 2018TrapeziusSerratus anteriorLatissimus dorsiPectroralis major  <response>: Origin-Lateral surfaces of upper 8 to 9 ribs and deep fascia overlying the related intercostal spaces Inseion-Costal surface of medial border of scapula Innervation-long thoracic nerve C5,6,7 Function-protraction and rotation of scapula, keeps medial border and inferior angle of scapula opposed to thoracic wall Winging of scapula: -As long thoracic nerve passes down the lateral thoracic wall on external surface of serratus anterior muscle just deep to skin subcutaneous tissue, it is vulnerable to damage. -Loss of function of this muscle cause medial border, paicularly inferior angle of scapula, to elevate away from thoracic wall Resulting in winging of scapula on pushing forward with arm - Normal elevation of arm a no longer possible. Trapezius: supplied by motor spinal pa of accessory nerve X1; sensory proprioception anterior rami of C3 C4 Function: powerful elevator of scapula, rotates scapula during abduction of humerus above Horizontal. Middle fibers retract scapula Lower fibers depress scapula Latissimus dorsi: supplied by thoraco- dorsal nerve C6, C7, C8 Function: adduction, medial rotation extension of arm at glenohumeral joint. Pectoralis major: innervated by medial lateral pectoral nerves. 