Gray's Anatomy
(2026-2027)
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, CERVICAL CURVATURE/ SECONDARY CURVATURE
Serratus posterior superior origin: Lower portion of ligamentum nuchae, spinous processes of CVII to TIII, and
supraspinous ligaments
Serratus posterior superior insertion: Upper border of ribs II to V just lateral to their angles
Serratus posterior superior innervation: Anterior rami of upper thoracic nerves (T2 to T5)
Serratus posterior superior function: Elevates ribs II to V
Serratus posterior inferior origin: Spinous processes of TXI to LIII and supraspinous ligaments
Serratus posterior inferior insertion: Lower border of ribs IX to XII just lateral to their angles
Serratus posterior inferior innervation: Anterior rami of lower thoracic nerves (T9 to T12)
Serratus posterior inferior function: Depresses ribs IX to XII and may prevent lower ribs from being elevated when
the diaphragm contracts
Levator scapulae origin: Transverse processes of CI to CIV
Levator scapulae insertion Upper portion medial border of scapula
Levator scapulae innervation: C3 to C4 and dorsal scapular nerve (C4, C5)
Levator scapulae function: Elevates scapula
Rhomboid major origin: Spinous processes of TII to TV
Rhomboid major insertion: Medial border of scapula between spine and inferior angle
Rhomboid major innervation: Dorsal scapular nerve (C4, C5)