Abstract
Changes in body orientation with respect to space during incline walking can alter vestibular information requiring a different solution to the problem of head stabilization. Eleven young adults walked along a level walkway, and ascended and descended an inclined surface. Head, neck and trunk angular positions in space were collected. Changes in the gravitoinertial vector imposed by the inclined surface, produced concomitant changes in body segment orientation that decreased head stability during the inclined walking tasks. Head, neck and trunk segments were least stable while ascending the incline creating the greatest challenge to head stability during this task. Movement strategies reflected adjustments of head-neck and neck-trunk patterns to accommodate changes in the gravitoinertial vector and insure balance of the head over the trunk.
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