Ultrasound elastography in the assessment of rigidity in Parkinson's disease: A scoping review

UE demonstrates strong potential as a non-invasive tool for quantifying muscular rigidity in PD, which is increased in these patients. Nevertheless, small sample sizes and inconsistent methodologies undermine definitive conclusions. Future studies should adhere to the methodological recommendations outlined in this review, including the adoption of standardised protocols, larger sample sizes, and robust longitudinal and reliability designs.