Splenius capitis action includes rotating the head to which side?

Splenius capitis action includes rotating the head to which side?

• A. Extends the head only
• B. Rotates the head to the opposite side
• C. Same side rotation of the head
• D. Elevates the scalp

Answer: (C)

Unilateral contraction of splenius capitis rotates the head to the same side. This muscle connects from the spine to the skull behind the ear, so when it pulls on the skull on one side, the head turns toward that same side. It can also help with lateral flexion to the same side. When both sides contract, the head is extended. Elevating the scalp isn’t a function of this muscle, and rotation to the opposite side isn’t produced by splenius capitis. So the action asked for—rotating the head to the same side—fits exactly with how this muscle works.

Unilateral contraction of splenius capitis rotates the head to the same side. This muscle connects from the spine to the skull behind the ear, so when it pulls on the skull on one side, the head turns toward that same side. It can also help with lateral flexion to the same side. When both sides contract, the head is extended. Elevating the scalp isn’t a function of this muscle, and rotation to the opposite side isn’t produced by splenius capitis. So the action asked for—rotating the head to the same side—fits exactly with how this muscle works.