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Updated: Aug 20, 2025
Measurement of Spatial Stability in Precision Grip
Published on: June 4, 2020
Precision and accuracy of measuring finger motion with a depth camera: a cross-sectional study of healthy
Lulu Lv1, Jiantao Yang1,2,3, Fanbin Gu1
1Department of Microsurgery, Orthopaedic Trauma and Hand Surgery, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.
Abstract:
The purpose of this cross-sectional study was to determine the precision and accuracy of the measurement of finger motion with a depth camera. Fifty-five healthy adult hands were included. Measurements were done with a depth camera and compared with traditional manual goniometer measurements. Repeated measuring showed that the overall repeatability and reproducibility of extension measured with the depth camera were within 3° and 4° and that of flexion were within 13° and 14°. Compared with traditional manual goniometry, biases of extension of all finger joints and flexion of metacarpophalangeal joints were less than 5°, and the average bias of flexion of proximal and distal interphalangeal joints was 29°. We conclude that the measurement of finger extension and flexion of the metacarpophalangeal joints with a depth camera was reliable, but improvement is required in the precision and accuracy of interphalangeal joint flexion.
