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C. D. E. Lumbar Flexion F. R-Erector Spinae G. L-Erector Spinae. A. B. Actuator / LC 1. Actuator / LC 3. Actuator / LC 2. Actuator / LC 4.
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C. D. E. Lumbar Flexion F. R-Erector Spinae G. L-Erector Spinae A. B. Actuator / LC 1 Actuator / LC 3 Actuator / LC 2 Actuator / LC 4 Figure 9. Data from a flexion perturbation of a typical subject is shown on A) Prior to load onset, B) maximum trunk flexion during the perturbation, and time series data of C) lumbar motion, D) right erector spinae, and E) left erector spinae. The schematics of the perturbation chair is shown in F) Top View and G) Side View.