<prompt> Winging of scapula is due to paralysis of:Nerve to trapeziusNerve to serratus anteriorNerve to latissimus dorsiNerve to pectoralis major  <response>: Ans. B Nerve to serratus anteriorRef: Grays Anatomy 41st ed. P 819 Winging of scapula is due to paralysis of serratus anterior muscle. Nerve supplying serratus anterior muscle: Long thoracic nerve C5, 6, 7. Therefore long thoracic nerve palsy can also lead to winging of scapula. Vascular supply: Serratus anterior is supplied by superior and lateral thoracic arteries, and by branches from the thoracodorsal artery after it divides in latissimus dorsi. 