Abstract: A reciprocating platform assembly for oscillating a subject supporting platform in a back and forth, headward to footward motion includes a platform mounted on displacement modules that are mounted to a frame. The displacement modules are signally connected to a processor that controls movement of the platform through operation of the displacement modules. The platform may be oscillated to soothe a subject on the platform to hasten a sleeping state of the subject or to minimize or prevent the occurrence of apneas in the subject. The platform may also be oscillated to assist or support ventilation and/or for cardiopulmonary/cardiac support of the subject. The platform is additionally useful in conjunction with a physiological monitor to rapidly shake the subject when an adverse event occurs to wake the subject and terminate the adverse event. The monitor may also be employed as a trigger for assisting or supporting ventilation and cardiac/cardiopulmonary support.