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Fig. 2 | Frontiers in Zoology

Fig. 2

From: A methodological exploration to study 2D arm kinematics in Ophiuroidea (Echinodermata)

Fig. 2

Visualisation of the actual movement in one trial of O. scolopendrina within time frames 1–5, indicating the variables disc movement, arm angle, and slip angle. IS, Initital side of the angle; TS, Terminal side of the angle. The axes imply the X and Y coordinates in the transformed Cartesian coordinate system in cm. The figure implies a full cycle of arm movement which was split into four equal intervals, yielding five frames

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