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Mrs. Smith has poison ivy on her shoulder, the poor thing. She reaches her right hand over to her left shoulder to "scratch that itch." Which movement is occurring at her ELBOW joint?
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Extension
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Circumduction
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Flexion
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Supination
That's Correct!
It's Wrong!
Flexion is the correct answer because when Mrs. Smith reaches her right hand over to her left shoulder to scratch the itch caused by the poison ivy, her elbow joint is bending. Flexion refers to the movement that decreases the angle between two bones at a joint, and in this case, the angle between the upper arm bone (humerus) and the forearm bones (radius and ulna) is decreasing as Mrs. Smith brings her hand closer to her shoulder.
