This is one of the adaptations to make in order to work with a traditional mouse or keyboard: tilting the hand backwards.
| Adaptation: | In order to enable the fingers to reach for and strike the keys, one has to lift the hand by moving it upward in the wrist. In medical terms this movement is referred to as dorsal flexion. | | Threat: | Again, maintaining this position requires continuous muscle activity. This position will also cause an increase of pressure in the carpal tunnel. The carpal tunnel is the passage in our wrists in which the blood vessels and nerves of our hands are located. Prolonged increased pressure on this tunnel might cause the same symptoms as mentioned with pronation. | | Symptoms: | Muscle tissue: pain, stiffness and early fatigue. Nerve tissue: 'pins and needles', loss of hand coordination and loss of strength. |
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