Abstract: The invention provides an articulating bed frame, comprising a stationary base frame having a head end, a foot end, and opposed longitudinal members connecting the same, an articulated moving upper frame mounted on a carriage, having leg support portions and upper body support portions articulated to each other and supported on the carriage traveling in channels attached to the bed frame for longitudinal shifting of the support portions relative to the base frame and a mattress-supporting body attached to the upper frame, the mattress-supporting body being divided into at least a first portion including a body support sub-portion, a thigh support sub-portion and a lower leg support sub-portion, and a second head support portion, wherein the articulated movable frame is connected to linkages causing displacement of the head-support portion, at the neck area of the user, linearly and normal relative to the plane of the first portion.