Spatial manipulator apparatus for a mammalian subject includes a stabilizing base; a hemispheroidal truss frame mounted for rotation on the stabilizing base, the truss frame supporting and stabilizing an outer generally circular rim in relation to a non-concentric hub located at its rotational axis; and a second frame mounted orthogonally within the outer rim on a second rotational axis, the second frame being configured to support a mammalian subject during spatial manipulation thereof by rotation about one or more of the orthogonal rotational axes. Preferably, the truss frame and the second frame are driven for rotation about the orthogonal rotational axes to achieve a desired mammalian-subject spatial orientation within a chair-like structure pivotally adjustably mounted within the second frame. Preferably, the truss frame includes a substantially circular rim member mounting the second frame for rotation therein; three or more struts connecting from circumferential substantially evenly spaced locations along the circular rim member to a point of convergence on the truss frame through which the first axis extends; and a hub at the point of convergence mounting the three or more struts.