Trapezius
O: Medial 1/3 of the Superior Nuchal Line of
the Occiput, Ligamentum Nuchae, and the
Spinous Processes of C7 through T12
I: Upper Trapezius – Lateral 1/3 of the Superior
border of the Clavicle
Middle Trapezius – Acromion Process
Lower Trapezius – Scapular Spine
A: Upper Trapezius – Elevates the scapula
Middle Trapezius – Adducts the scapula
Lower Trapezius – Depresses the scapula
Splenius Capitis
O: Spinous Processes of C7 through T4
I: Mastoid Process of the Temporal bone and Lateral Superior Nuchal Line of the Occiput
A: Extension, lateral flexion, and same-side rotation of neck and head
Splenius Cervicis
O: Spinous Processes of T3 through T6
I: Transverse Processes of C1 through C3
A: Extension, lateral flexion, and same-side rotation of neck and head
Levator Scapulae
O: Transverse processes of C1 – C4
I: Medial border of the Scapula above the scapular spine
A: Elevates the medial border of the scapula, lateral flexion of the neck and head
Iliocostalis Cervicis
O: posterior aspect of upper 6 ribs
I: transverse processes of C4 – C6
A: Rotates and extends vertebrae
Longissimus Cervicis
O: transverse processes of T1 – T6
I: transverse processes of C2 – C7
A: extends the vertebrae
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