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. Author manuscript; available in PMC: 2011 Apr 12.
Published in final edited form as: Hum Mov Sci. 2010 Dec 23;30(1):74–89. doi: 10.1016/j.humov.2010.10.002

Figure 1.

Figure 1

Three configurations of the twisting apparatus. Subjects stood on a platform that rotates the feet and lower segment together while the upper segment is fixed above to a rigid frame, via a suspension system (zigzag lines) and torque sensor (T). A) Neck: shoulders affixed to the rotating platform with head fixed above. B) Trunk: pelvis affixed to rotating platform with shoulders fixed above. C) Hip: feet rotated with platform with pelvis fixed above.