Figure 1
From: Biomechanical evaluation of a novel wheelchair backrest for elderly people
Experimental wheelchair. The picture shows the actual experimental wheelchair, the backrest was divided into 3 parts, comprising thoracic, lumbar, and sacral adjustment mechanisms. Each mechanism is capable of rotating around the X-axis and translating about the Y-axis and the Z-axis. The seat height, seat depth, footrest length, and footrest angles can all be adjusted. The current setting is backward thoracic support in the sagittal plane.