PT Question of the week – Thumb biomechanics
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You are discussing thumb biomechanics with your student, who is confused about the difference between thumb flexion, extension, abduction, and adduction. Which of the following statements is correct?
- Extension is performed in a plane parallel to the palm of the hand, and abduction is performed in a plane perpendicular to the palm of the hand
- Flexion is performed in a plane perpendicular to the palm of the hand, and adduction is performed in a plane parallel to the palm of the hand
- Extension is performed in a plane perpendicular to the palm of the hand, and adduction is performed in a plane parallel to the palm of the hand
- When referring to positions of the thumb, flexion and adduction are used synonymously and extension and abduction are used synonymously
The solution will be posted in a few days.
CEO, OrthoRecovery Specialists
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