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. Author manuscript; available in PMC: 2018 Apr 1.
Published in final edited form as: Biomech Model Mechanobiol. 2016 Oct 4;16(2):583–596. doi: 10.1007/s10237-016-0838-6

Fig. 8.

Fig. 8

The definition of the relative angle θij between ith and jth child branches in a trifurcation for classification of trifurcations looking from (a) an arbitrary direction and (b) a direction parallel to the plane defined by the first and third child branches. The trifurcations have: (c) rθ123 (= 0.61) below the threshold value of 0.81 and (d) rθ123 (= 0.89) above the threshold value of 0.81 looking from a direction parallel to the plane defined by the first and third child branches. The black and red lines show the CLs of parent and child branches, respectively, and 1, 2 and 3 show the order of child branches at the trifurcation.