Changes in preferred postural patterns following stroke during intentional ankle/hip coordination.
We compared the spatio-temporal postural organization between stroke patients and healthy controls in a bipedal standing task where participants had to intentionally produce two specific ankle/hip coordination patterns: in-phase and anti-phase. The pattern to reproduce was visually represented by a ankle-hip Lissajous figure, and a real-time biofeedback displayed the current coordination sur-imposed to the expected coordination. Contrary to the healthy participants who were successful at reproducing the two patterns, stroke patients were unable to produce the in-phase pattern. In addition, when the anti-phase pattern was required, a reduction of stability was observed for the stroke group. The impairment of postural capacities following stroke was thus accompanied by a disappearance of one of the two preferred patterns found in healthy participants, a result that have consequences for understanding the etiology of postural pattern formation and the elaboration of rehabilitation programs.
Varoqui
Deborah
D
Motor Efficiency and Deficiency Laboratory, University Montpellier 1, av. du Pic St. Loup, 34090 Montpellier, France. deborah.varoqui@gmail.com
Froger
Jérôme
J
Lagarde
Julien
J
Pélissier
Jacques-Yvon
JY
Bardy
Benoît G
BG
D000328:Adult; D000368:Aged; D000842:Ankle / Q000503:physiopathology*; D016022:Case-Control Studies; D056228:Feedback, Sensory; D005260:Female; D006429:Hemiplegia / Q000503:physiopathology; D006615:Hip / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D004856:Postural Balance / Q000502:physiology*; D020521:Stroke / Q000503:physiopathology*