In the functional position for the hand, which posture best describes the thumb?

In the functional position for the hand, which posture best describes the thumb?

• A. Abduction
• B. Adduction
• C. Extension
• D. Flexion

Answer: (A)

In the functional position of the hand, the thumb is oriented away from the palm—that is, abducted. This positioning sets the thumb up to oppose the other digits, allowing a stable grip and precise manipulation. Abduction creates the space and leverage needed for the thumb to meet objects and participate in pinching or grasping tasks. If the thumb moved toward the palm (adduction) or was held straight or tucked (extension or flexion), grip efficiency would decrease because the hand wouldn’t have the same ready-to-grasp alignment. While opposition does involve some flexion combined with abduction, the thumb’s resting orientation in functional position is best described as abducted.

In the functional position of the hand, the thumb is oriented away from the palm—that is, abducted. This positioning sets the thumb up to oppose the other digits, allowing a stable grip and precise manipulation. Abduction creates the space and leverage needed for the thumb to meet objects and participate in pinching or grasping tasks. If the thumb moved toward the palm (adduction) or was held straight or tucked (extension or flexion), grip efficiency would decrease because the hand wouldn’t have the same ready-to-grasp alignment. While opposition does involve some flexion combined with abduction, the thumb’s resting orientation in functional position is best described as abducted.