<prompt> Nerve supply of TrapeziusSpinal accessory nerveHypoglossal nerveTrochlear nerveTrigeminal nerve  <response>: TRAPEZIUS: Origin: medial 13 rd of superior nuchal line., ligamentum nuchae, external occipital protuberance and spines of C7-T12 veebrae. Inseion:-lateral 13rd of clavicle., medial margin of acromion,superior margin of spine of scapula. Nerve supply: spinal accessory motor,C3,C4 spinal nerves proprioceptive. Action:- upper fibres elevate scapula,middle fibres retract ,and lower fibres depress scapula. Reference: vishram singh, pg no. 72 