Origin of Splenius capitis.

• A. Spinous processes T3-T6
• B. Spinous processes T11-L2
• C. Nuchal ligament and spinous processes C7-T4
• D. Transverse processes of C1-C3

Answer: (C)

Splenius capitis starts from the nuchal ligament and the spinous processes of the lower cervical to upper thoracic spine, typically C7 through T4. From there, its fibers run upward and outward to attach to the mastoid process and the lateral part of the occipital bone, allowing the head to extend and rotate to the same side. This origin is what enables its action on the head. The other options point to different regions or different attachments: the spinous processes of T3–T6 are the origin for the splenius cervicis, not capitis; the transverse processes of C1–C3 are associated with the splenius cervicis insertion; and spinous processes of T11–L2 are far down the spine and not involved with the neck muscles. So the described origin—nuchal ligament and spinous processes C7–T4—matches splenius capitis.