Measurement of Flexion Angle of the Finger Joint during Cylinder Gripping Using a Three-Dimensional Bone Model Built by X-Ray Computed Tomography

Table 6

Coupling ratio (CR), the ratio of the flexion angles of the DIP and PIP.

Diameter	Index	Middle	Ring	Small	All
10 mm	0.47 (0.24)	0.62 (0.16)	0.52 (0.16)	0.73 (0.18)	0.58 (0.20)
60 mm	0.77 (0.29)	0.75 (0.26)	0.58 (0.21)	1.10 (0.67)	0.80 (0.43)
120 mm	0.85 (0.41)	0.96 (0.98)	0.73 (0.44)	0.97 (0.67)	0.88 (0.65)
All	0.70 (0.35)	0.78 (0.59)	0.61 (0.30)	0.93 (0.56)	0.75 (0.48)

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