Patients with Parkinson's disease (PD) or atypical parkinsonism often present with abnormal posture. A retrospective observational study conducted by Doherty et al. (2011) showed that a third of patients with PD had a deformity of their limbs, neck, or trunk. The most recognized type of deformity is the classic stooped simian appearance, with flexion of the hips and knees, and rounding of the shoulders (Doherty et al., 2011). Severe postural deformities include kyphosis, camptocormia, antecollis, Pisa syndrome, and scoliosis. The underlying pathophysiology of these deformities is largely unknown, and their management remains difficult (Doherty et al., 2011).