When standing in the anatomical position, if you raise your arm by flexing the shoulder joint, and keep the elbow joint fully extended, what form of motion does the arm undergo?Group of answer choicesrectilinear translationgeneral motioncurvilinear translationrotational motion
Question
When standing in the anatomical position, if you raise your arm by flexing the shoulder joint, and keep the elbow joint fully extended, what form of motion does the arm undergo?Group of answer choicesrectilinear translationgeneral motioncurvilinear translationrotational motion
Solution
The arm undergoes a curvilinear translation. This is because when you raise your arm by flexing the shoulder joint and keep the elbow joint fully extended, your arm is moving along a curved path. This is different from rectilinear translation, which involves movement along a straight line. General motion involves both translation and rotation, and rotational motion involves a body rotating around a fixed axis. In this case, the arm is not rotating around a fixed axis, nor is it moving in a straight line, so the best answer is curvilinear translation.
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