A patient support apparatus includes a frame and seat, thigh, and head sections coupled to the frame. A linkage is coupled to the head, seat, and thigh sections. The linkage has a first mode of operation in which the seat and thigh sections remain substantially parallel to each other as the head section is raised and lowered and the linkage has a second mode of operation in which the thigh section tilts relative to the seat section as the head section is raised and lowered. A handle is movable relative to the head section between a first position in which the linkage is in the first mode of operation and a second position in which the linkage is in the second mode of operation.