Dynamic adaptive headrest for the trunk - shoulder - neck - neck - and the head region and a loss of the postural stability

摘要

A part of the headrest extends in the lower region in the form of a tongue caudal to the body region, c3 (third cervical vertebra) up to the th10 (tenth breast vortices), the contact face c3 – th10(Drawing no. 1 – region extends horizontally)