Clinical Report: ‘Freezing Of Gait’ Gets New Definition

Overview

The International Consortium for Freezing of Gait has proposed updated clinical and technical definitions for freezing of gait (FOG) in Parkinson's disease to enhance assessment standardization. The new definitions aim to improve measurement reliability and support the validation of objective detection methods.

Background

Freezing of gait is a significant symptom in Parkinson's disease, characterized by sudden episodes of an inability to step effectively. Its episodic and heterogeneous nature complicates measurement and contributes to variability in research findings. Standardizing definitions is crucial for improving clinical assessments and advancing research methodologies.

Data Highlights

No numerical data or trial data provided in the source material.

Key Findings

• FOG is defined as paroxysmal episodes of ineffective stepping despite the intention to walk.
• New technical definitions facilitate standardized scoring of FOG episodes from video recordings.
• Classification of freezing manifestations simplified into three categories: akinetic, kinetic-trembling, and kinetic-no-trembling freezing.
• Observation of a freezing episode during examination is necessary for a definite FOG classification.
• Medication state can influence the occurrence of freezing episodes, necessitating evaluations in both medicated and unmedicated states.

Clinical Implications

Healthcare professionals should adopt the new definitions for FOG to enhance diagnostic accuracy and treatment planning. Observational assessments during clinical evaluations are essential for reliable classification of FOG in patients.

Conclusion

The updated definitions for freezing of gait represent a significant advancement in the standardization of assessments in Parkinson's disease, potentially leading to improved patient management and research outcomes.

References

1. International Consortium for Freezing of Gait, Nature Reviews Neurology, 2025 -- An updated definition of freezing of gait
2. International Consortium for Freezing of Gait, Nature Reviews Neurology, 2025 -- Management of freezing of gait
3. Brain — Neural substrates of the link between dual-task gait and dementia: an intermediary step in which direction?
4. Exploring the Diverse Gait Phenotypes in Normal Pressure Hydrocephalus Beyond Lower Body Parkinsonism
5. Effects of Shortening Femoral Stem Length on Gait Outcomes in Total Hip Arthroplasty
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7. An updated definition of freezing of gait | Nature Reviews Neurology
8. Management of freezing of gait — mechanism-based practical recommendations | Nature Reviews Neurology
9. The Effects of Repetitive Transcranial Magnetic Stimulation on Gait, Motor Function, and Balance in Parkinson’s Disease: A Systematic Review and Meta-Analysis of Randomized Controlled Trials | MDPI