Which of the following patterns is described as bilateral in nature on a horizontal axis?

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Multiple Choice

Which of the following patterns is described as bilateral in nature on a horizontal axis?

Explanation:
Motion about a horizontal axis corresponds to flexion and extension. When a pattern is described as bilateral, it means the involved segments on both sides move in the same direction. So a bilateral pattern of flexion/extension occurs on that horizontal (transverse) axis. This makes the described pattern the correct one. Torsions (right-on-left or left-on-left) involve rotation about oblique/vertical axes and are not bilateral on a horizontal axis, and unilateral shear is asymmetrical.

Motion about a horizontal axis corresponds to flexion and extension. When a pattern is described as bilateral, it means the involved segments on both sides move in the same direction. So a bilateral pattern of flexion/extension occurs on that horizontal (transverse) axis. This makes the described pattern the correct one. Torsions (right-on-left or left-on-left) involve rotation about oblique/vertical axes and are not bilateral on a horizontal axis, and unilateral shear is asymmetrical.

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