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Skeleton model in 4DEYE during natural standing position. (A) Posture evaluation in the sagittal plane. (B) Posture evaluation in the frontal plane. The key anatomical points include the nose, eye, ear, shoulder joint (center), elbow joint (center), wrist joint (center), thumb, index finger, little finger, hip joint (center), knee joint (center), ankle joint (center), heel, and toe.
