求翻译：受试者将一只手手心向下轻放在桌面，使中指轻轻搭在指脉换能器感受片上。让受试者保持舒适的姿势，不会因为除了电刺激外的其他因素晃动手臂。示意图是什么意思？

Subjects will hand palm down lightly on the desktop, so that the middle finger gently in refers to the pulse transducer feel chip. Subjects to maintain a comfortable posture, not shaking arm in addition to other factors outside of the electrical stimulation. Schematic diagram

The subject will be a hand palm down lightly on the desktop, point to the ground gently Pulse transducer feel. Let the subject comfortable position and electrical stimulation in addition will not be because of other factors outside swing arm. Schematic

Downward is placed lightly trying a hand control the tabletop, causes the middle finger to build gently in takes the pulse on the transducer feeling piece.Let the trying maintenance comfortable posture, cannot because rocks the arm besides the electricity stimulation other factors.Schematic drawing

Subject to a hand Palm down light desktop, gently take the middle finger on the pulse transducer. Participants maintain a comfortable position, not because of other factors in addition to electrical stimulation of swing arm. Schematic diagram

正在翻译，请等待...