Attentional demands of postural control: the ability to selectively allocate information-processing resources.
Most studies have suggested the process of recovering body stability requires information-processing resources, but whether adults have the ability to selectively allocate resources to maintain balance is not known. Using a variable priority dual-task paradigm the present experiment investigated the extent to which young adults are able to shift attention between a postural task and a visual spatial memory task. Our results demonstrated a significant difference in verbal response time dependent on instructional set (focus on visual spatial memory versus postural task) but no difference in body sway measurement, indicating the ability of young adults to modulate visual spatial memory task, but not postural task focus. This suggests the existence of a hierarchy within attentional tasks with postural stability being a priority to stabilize gaze and head position.
Department of Human Physiology, University of Oregon, Eugene, OR 97403, USA. ksiu@uoregon.edu
Ka-Chun
KC
Siu
Marjorie H
MH
Woollacott
D000328:Adult; D001288:Attention / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008568:Memory; D008570:Memory, Short-Term / Q000502:physiology; D008606:Mental Processes / Q000502:physiology*; D011187:Posture / Q000502:physiology*; D011930:Reaction Time; D013028:Space Perception / Q000502:physiology; D014796:Visual Perception / Q000502:physiology