Which statement correctly pairs side and contraction type?

Which statement correctly pairs side and contraction type?

• A. Ipsilateral contraction involves opposite sides.
• B. Contralateral contraction involves the same side.
• C. Ipsilateral contraction involves the same side.
• D. Contralateral contraction involves movement on the same side.

Answer: (C)

Side references hinge on whether actions occur on the same side of the body or on opposite sides. Ipsilateral means on the same side, while contralateral means on opposite sides. So saying that an ipsilateral contraction involves the same side correctly reflects the definition. For example, contracting the muscles on your right side to move the right limb demonstrates an ipsilateral contraction because the movement is on the same, right side. The other statements mix up these meanings: ipsilateral contraction involving opposite sides is incorrect, contralateral contraction involving the same side is incorrect, and contralateral contraction involving movement on the same side is also incorrect.

Side references hinge on whether actions occur on the same side of the body or on opposite sides. Ipsilateral means on the same side, while contralateral means on opposite sides. So saying that an ipsilateral contraction involves the same side correctly reflects the definition. For example, contracting the muscles on your right side to move the right limb demonstrates an ipsilateral contraction because the movement is on the same, right side. The other statements mix up these meanings: ipsilateral contraction involving opposite sides is incorrect, contralateral contraction involving the same side is incorrect, and contralateral contraction involving movement on the same side is also incorrect.