患者直接控制虚拟手臂来执行特定的任务，如升降前臂，收缩手腕，张合手掌，夹捏拇指食指。

Patients direct the virtual arm to perform specific tasks such as raising and lowering the forearm, flexing the wrist, opening and closing the hand, and pinching the thumb and forefinger.

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这两个组都同样出色的学会了简单的手臂动作，如升降手臂。

Both groups learned simple arm motions, such as raising and lowering the arm, equally well.

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