1. The Effect of a Dual-Task on Obstacle Crossing in Healthy Elderly and Young Adults 
Hyeong-Dong Kim, PhD, Denis Brunt, EdD 
Archives of Physical Medicine and Rehabilitation 
Volume 88, Issue 10, Pages (October 2007)
DOI: /j.apmr
Copyright © 2007 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

2. Fig 1 Experimental setup.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )
Copyright © 2007 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

3. Fig 2
Anteroposterior (Fx) ground reaction force dependent variables of a trial for a young subject, where the cutaneous stimulus was presented at every trial and before toe-off. The vertical arrows represent time of stimulus and reaction time (RT). Vertical lines represent movement onset, swing toe-off, swing heel-strike, and stance toe-off. Dependent measures of the stance and swing limb ground reaction forces are indicated. In this trial, reaction time was 360ms and peak shear force (Fx) of the stance limb was 57% of BW.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )
Copyright © 2007 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

4. Fig 3
Reaction time for baseline and dual-task conditions. The dual-task stimulus was presented at every trial and random trial both before and after toe-off. Abbreviations: EA, every trial after toe-off; EB, every trial before toe-off; RA, random trials after toe-off; RB, random trials before toe-off.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )
Copyright © 2007 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

5. Fig 4
Toe clearance for the baseline and dual-task conditions. The dual-task stimulus was presented at every trial and random trial both before and after toe-off. Abbreviations: see fig 3.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )
Copyright © 2007 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions