If the right sternocleidomastoid contracts unilaterally, the resulting movement will be
A) lateral flexion of the head to the right and rotation of the head to the left.
B) lateral flexion of the head to the left and rotation of the head to the right.
C) lateral extension of the head to the right and rotation of the head to the left.
D) lateral extension of the head to the left and rotation of the head to the right.

Question

Quizplus · Accepted Answer

The sternocleidomastoid muscle, when contracted unilaterally, causes lateral flexion of the head to the same side (right) and rotation of the head to the opposite side (left).

If the Right Sternocleidomastoid Contracts Unilaterally, the Resulting Movement Will