Clinical Tremor Severity Estimation Using an Instrumented Eating Utensil

Area of Science:

• Biomedical Engineering
• Neurology
• Medical Technology

Background:

• Hand tremor significantly impacts daily living activities.
• Objective and reliable tremor assessment is crucial for diagnosis and management.
• Current clinical tremor scoring relies on subjective expert evaluation.

Purpose of the Study:

• To assess the feasibility of using a motion-sensing, tremor-cancelling eating utensil for estimating clinical tremor scores.
• To develop and validate a model for objective tremor severity assessment.

Main Methods:

• Thirteen patients with tremor participated in the study.
• Hand tremor was assessed by three experts using the modified Fahn-Tolosa-Marin (FTM) scale.
• A linear model was trained using motion signals from the instrumented utensil to estimate tremor severity.

Main Results:

• The instrumented utensil demonstrated high accuracy in estimating tremor severity, closely matching expert clinical scores.
• The average FTM scores for Parkinson's Disease (PD) and Essential Tremor (ET) patients were accurately predicted by the model.
• A strong correlation (0.91, p < 0.001) was observed between clinical and model-derived tremor scores.

Conclusions:

• Motion data from an instrumented eating utensil can accurately derive tremor ratings.
• This technology enables practical, objective, and daily monitoring of hand tremor.
• The developed system holds potential for improved tremor assessment and patient management.