The rectus abdominis causes flexion when contracted ________.

Question

Quizplus · Accepted Answer

The rectus abdominis is a paired muscle that runs from the pubic bone to the rib cage. When both sides of the muscle contract together, it causes flexion of the trunk. Therefore, bilaterally is the correct answer. Unilateral contraction of the rectus abdominis will cause lateral flexion of the trunk, not flexion. Eccentric contraction of the rectus abdominis will lengthen the muscle and control the movement of the trunk, but it will not cause flexion.

The Rectus Abdominis Causes Flexion When Contracted ________