A convertible chair, for example, a hair transplantation chair that permits movement of the patient during a procedure while the patient's head remains substantially stationary. The chair may include a head support and a plurality of body supports that may be mounted on a base, or on a cradle movably attached to the base. The chair can be configured for a follicular unit harvesting procedure and it could be also converted into a hair implantation configuration for hair implantation procedure. The patient remains in the chair during the procedure with his head substantially stationary, while various parts of his body may be repositioned, for example, by rotation of the cradle. The chair may be automated, or assisted with pneumatics, motors, foot pumps and the like. The chair is particularly useful for assisting robotic hair transplantation procedures.