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Trapezius

Table Of Contents: Abductor Digiti Minimi; Abductor Pollicis Brevis; Abductor Pollicis Longus; Adductor Pollicis; Anconeus; Biceps Brachii; Brachialis; Brachioradialis; Coracobrachialis; Deltoid; Extensor Carpi Radialis Brevis; Extensor Carpi Radialis Longus; Extensor Carpi Ulnaris; Extensor Digiti Minimi; Extensor Digitorum; Extensor Indicis; Extensor Pollicis Brevis; Extensor Pollicis Longus; Flexor Carpi Radialis; Flexor Carpi Ulnaris; Flexor Digitorum Profundus; Flexor Digiti Minimi Brevis; Flexor Digitorum Superficialis; Flexor Pollicis Brevis; Flexor Pollicis Longus; Infraspinatus; Interosseous Muscles, Dorsal; Interosseous Muscles, Palmar; Latissimus Dorsi; Levator Scapulae; Opponens Digiti Minimi; Opponens Pollicis; Palmaris Longus; Pectoralis Major; Pectoralis Minor; Pronator Quadratus; Pronator Teres; Rhomboid Major and Minor; Serratus Anterior; Subscapularis; Supinator; Supraspinatus; Teres Major; Teres Minor; Trapezius; Triceps Brachii

Origin		Medial third of superior nuchal line; external occipital protruberance, nuchal ligament, and spinous processes of C7 - T12 vertebrae
Insertion		Lateral third of clavicle, acromion, and spine of scapula
Action		Elevates, retracts and rotates scapula; superior fibers elevate, middle fibers retract, and inferior fibers depress scapula; superior and inferior fibers act together in superior rotation of scapula
Innervation		Spinal root of accessory nerve (CN XI) (motor) and cervical nerves (C3 and C4) (pain and proprioception) (XI, C3, C4)
Arterial Supply		Transverse certical artery

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Trapezius