A support chair has a base with wheels, a support post with a translation mechanism, a power system with controls, an upper seat portion having a downward-extending post engaging the support post and engaging the translation mechanism such that the chair portion raises and lowers, a back-support portion hinged to the seat portion, a leg-support portion hinged to the seat portion, a plurality of attachment interfaces implemented to frame elements of the support chair, and at least one multiply-articulated peripheral support assembly having a padded surface at one end and a support interface at an opposite end, the support interface enabled to join to any one of the attachment interfaces implemented to the frame elements.
