Muscles acting on pectoral girdle

Trapezius Origin

Nuchal ligament, spines of C7-T12, external occipital protuberance

Trapezius Insertion

Lateral 1/3 scapula, acromion, scapular spine

Trapezius Action

Scapular retraction, elevation (upper trap), depression (lower trap)

Trapezius Innervation

Cranial n. XI

Trapezius Blood Supply

Transverse cervical a.; dorsal scapular a.

Levator scapulae origin

transverse process of C1-C4

Levator scapulae insertion

Medial margin of scapula, superior to scapular spine

Levator scapulae action

Scapular elevation

Levator scapulae innervation

Dorsal scapular n. (C5)

Levator Scapulae blood supply

Dorsal scapular a.

Rhomboid major origin

Spines of T2-T5

Rhomboid major insertion

Medial margin of scapula

Rhomboid major action

Scapular retraction

Rhomboid major innervation

Dorsal scapular n. (C5)

Rhomboid major blood supply

Dorsal scapular a.

Rhomboid minor origin

Nuchal ligament, spines of C7-T1

Rhomboid minor insertion

Medial border of scapular spine

Rhomboid minor action

Scapular retraction

Rhomboid minor innervation

Dorsal scapular n. (C5)

Rhomboid minor blood supply

Dorsal scapular a.

Serratus anterior origin

Ribs 1-8

Serratus anterior insertion

Medial border and inferior angle of scapula

Serratus anterior action

scapular protraction

Serratus anterior innervation

Long thoracic n. (C5-C7)

Serratus anterior blood supply

Lateral thoracic a.

Pectoralis minor origin

Ribs 3-5

Pectoralis minor insertion

Coracoid process of scapula

Pectoralis minor action

Scapular protraction, stabilization

Pectoralis minor innervation

Medial pectoral n. (C8, T1)

Pectoralis minor blood supply

Pectoral a.

Subclavius origin

Costal cartilage of rib 1

Subclavius insertion

Inferior clavicle

Subclavius action

Clavicular depression, stabilization

Subclavius innervation

nerve to subclavius of superior trunk of brachial plexus (C5, C6)

Subclavius blood supply

Clavicular a. (Thoracromial trunk)