(Gray's Anatomy for Students
4th Edition)
(2026-2027)
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, Origin of Deltoid Inferior edge of the crest of the spine of the scapula, lateral margin of the
acromion, anterior border
of lateral one-third of clavicle
Insertion of Deltoid Deltoid tuberosity of humerus
Innervation of Deltoid Axillary nerve (C5, C6)
Function of Deltoid Major abductor of arm; clavicular fibers assist in flexing the arm; posterior
fibers assist in extending the arm
Levator Scapulae
Origin of Levator Scapulae Transverse processes of CI and CII vertebrae and posterior tubercles of
transverse processes of CIII and CIV vertebrae
Insertion of Levator Scapulae Posterior surface of medial border of scapula from superior angle to root of
spine of the scapula
Innervation of Levator Scapulae Branches directly from anterior rami of C3 and C4 spinal nerves and by
branches (C5) from the dorsal scapular nerve
Function of Levator Scapulae Elevates the scapula
Rhomboid Minor
Origin of Rhomboid Minor Lower end of ligamentum nuchae and spinous processes of CVII and TI
vertebrae
Insertion of Rhomboid Minor Posterior surface of medial border of scapula at the root of the spine of the
scapula
Innervation of Rhomboid Minor Dorsal scapular nerve (C4, C5)
Function of Rhomboid Minor Elevates and retracts the scapula