Myhr and von Wendt. In
the customized seating device, children symmetrically
bore weight on their ischial tuberosities with the line of
gravity of the upper body anterior to the axis of rotation at
the ischial tuberosities. The children’s hips were also fixed
with a belt under the seat, and their thighs were separated
by an abduction orthosis. The seat base itself was either
horizontal or anteriorly tipped.