Related Experiment Video
Updated: Jan 6, 2026

Computerized Dynamic Posturography for Postural Control Assessment in Patients with Intermittent Claudication
Published on: December 11, 2013
Alternating flexed-extended posturing in progressive supranuclear palsy
Nobuyuki Ishii1, Hitoshi Mochizuki1
1Division of Neurology, Respirology, Endocrinology and Metabolism, Department of Internal Medicine, University of Miyazaki, Japan.
Abstract:
A 69-year-old man who had been bedridden in nursing home because of a 5- year history of progressive supranuclear palsy (PSP) was admitted due to aspiration pneumonia. Besides neck dystonia in extension, he showed "alternating flexed-extended posturing", in which the arm was flexed on one side and extended on the other. Magnetic resonance imaging of the brain revealed global cerebral atrophy that predominantly affected the cortex and midbrain. The mechanisms of complex posturing in late-stage PSP may sometimes be related to decortication and decerebration as well as dystonia, and "alternating flexed- extended posturing" might be one of the phenotypes of pathological progression in PSP.
More Related Videos
Related Concept Videos
Parkinson's Disease: Overview
Parkinson's Disease: Treatment
Parkinson's Disease is primarily a result of the loss of dopaminergic neurons in the substantia nigra pars compacta. The cornerstone of...

