The ability to utilize sensory and motor information in anticipation of postural demands based on previous sensory experiences and learning, also referred to as postural background adjustment. Subtle spontaneous postural adjustments occurring in the trunk and lower extremities in preparation for voluntary movements .Postural background increase the ease the of engagement through movements of the hands such as reaching for a distant object(far visual fixations) the unconscious awareness of the neck to make compensatory postural adjustments is dependent on integration of vestibular –proprioceptive inputs(visual ambient process)