Trapezius Muscle: The trapezius is a broad, flat and triangular muscle. Trapezius a large muscle consisting of three parts covering upper back, shoulders, and neck. The muscles on each side form a trapezoid shape.
Attachment of Trapezius
Origin:
Upper part- occipital bone, nuchal ligament.
Middle part- spinous processes of C7-T3 vertebrae.
Lower part- spinous processes of middle and lower thoracic vertebrae.
Insertion: External occipital protuberance, medial superior nuchal line, nuchal ligament, posterior border of the lateral third of clavicle, acromion process and spine of the scapula.
Also, Like Trapezius Muscle Spasms – Rapid and Effective Treatment
Nerve supply of Trapezius
Accessory nerve, cervical spinal nerve (C3 and C4).
Actions of Trapezius:
Upper fibers of trapezius elevate the scapula and rotate during abduction of the arm.
The middle fibers trapezius retract the scapula
The lower fibers trapezius pull the scapula inferiorly.
Upper Extremity Muscle Atlas
- Abductor Pollicis Longus
- Abductor Digiti Minimi
- Abductor Pollicis Brevis
- Adductor Pollicis
- Anconeus
- Biceps Brachii
- Brachioradialis
- Brachialis
- Coracobrachialis
- Deltoid
- Extensor Carpi Radialis Longus
- Extensor Carpi Radialis Brevis
- Extensor Carpi Ulnaris
- Extensor Digitorum
- Extensor Digiti Minimi
- Extensor Indicis
- Extensor Pollicis Longus
- Extensor Pollicis Brevis
- Flexor Carpi Radialis
- Flexor Carpi Ulnaris
- Flexor Digitorum Profundus
- Flexor Digitorum Superficialis
- Flexor Digiti Minimi Brevis
- Flexor Pollicis Brevis
- Flexor Pollicis Longus
- Infraspinatus
- Interosseous Muscles, Dorsal
- Interosseous Muscles, Palmar
- Levator Scapulae
- Latissimus Dorsi
- Opponens Digiti Minimi
- Opponens Pollicis
- Pectoralis Major
- Pectoralis Minor
- Palmaris Longus
- Pronator Quadratus
- Pronator Teres
- Rhomboid Major and Minor
- Subscapularis
- Supinator
- Serratus Anterior
- Supraspinatus
- Trapezius
- Triceps Brachii
- Teres Major
- Teres Minor