Fig. 1
From: Development of a single device to quantify motor impairments of the elbow: proof of concept
Overview of the Shoulder Elbow Perturbator (SEP), which manipulates shoulder abduction activity for elbow function quantification. A Participant seated in the SEP, strapped in the chair and with an emergency button attached to the upper leg. The forearm is fixated with the shoulder abducted in 80 degrees. B Internals of the SEP and illustration of how the wrist of the user is clamped (1) to the device with the elbow (2) aligned with the motor rotation axis. The torque link (3) transmits the torque of the motor (4) to the elbow. C) Internals of the SEP showing the sarrus and spring compensation mechanism. The sarrus linkages (5) allow for vertical displacement of the arm. The arm is supported by an upward force created by two springs (6). The cable routing and pulley configuration caused the upward force to be independent of the linkage position (7)