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Splenius capitis origin,
Splenius capitis insertion,
Splenius capitis action,
Splenius capitis innervation,
Lateral branches of dorsal rami
Splenius cervicis origin,
Spinous processes of T3–T6
Splenius cervicis insertion,
Transverse processes of C1–C3 or C4
Splenius cervicis action,
Neck extension (shared action entry in the chart); the chart's action column lists this after the splenius capitis actions
Splenius cervicis innervation,
Lateral branches of dorsal rami (shared innervation entry in the chart)