Are there deficits in anticipatory postural adjustments in Parkinson's disease?
We studied anticipatory postural adjustments in patients with Parkinson's disease who dropped a load from extended arms while standing. Anticipatory postural adjustments were seen when load dropping was induced by a fast, bilateral shoulder abduction but not when it was induced by pressing a trigger with the right thumb. We conclude that anticipatory postural adjustments in patients with Parkinson's disease can change with the magnitude of an action which is used to trigger a predictable postural perturbation. Thus, the described deficits in anticipatory postural adjustments in patients with Parkinson's disease are likely to be of quantitative rather than qualitative nature.
Department of Physical Medicine & Rehabilitation, Rush-Presbyterian St. Luke's Medical Center, Chicago, IL 60612, USA.
A S
AS
Aruin
I
I
Neyman
J J
JJ
Nicholas
M L
ML
Latash
D000368:Aged; D004576:Electromyography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010300:Parkinson Disease / Q000503:physiopathology*; D011187:Posture / Q000502:physiology*