Does Pisa syndrome affect upper limb function in patients with Parkinson's disease? An observational cross-sectional study.

Background: Trunk alignment is thought to contribute to upper limb (UL) function. However, this common assumption is not clear in patients with Parkinson's Disease (PD) suffering from Pisa syndrome (PS). PS is a postural abnormality, characterized by revisable lateral trunk flexion more than 10 degrees.