Why's my 79 yr bedbound mother who has spine compression cancer for 2 1/2 yrs over few months posture of neck in wheelchair lopsided to right side ,i try to carefully pull her neck back straight but it keeps pulling back .her arms crossed rigid too?

Reclining wheelchair: I am sad for your mom’s condition, and you are commended for assisting her. She needs a reclining wheelchair with an extended back, as her spine cannot hold its position either due to muscle/bone weakness or other fractures. Also, her muscles are shortening, resulting in the arm tightness you describe. She will benefit from gentle range of motion and foam wedges for positioning.