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Journal of the Korean Academy of Rehabilitation Medicine 2005;29(5):495-500.
Quantitative Assessment of Intention Tremor after Brain Injury Using Tri-axial Accelerometry.
Kim, Deog Young , Park, Chang Il , Chang, Won Hyuk , Jang, Yong Won , Park, Tae Hoon , Chon, Joongson
1Department and Research Institute of Rehabilitation Medicine, Yonsei University College of Medicine, Korea. iamchangwh@dreamwiz.com
2Hansarang Asan General Hospital, Korea.
3축 가속도계를 이용한 뇌손상 후 활동 진전의 정량적 측정법
김덕용, 박창일, 장원혁, 장용원, 박태훈, 전중선1
연세대학교 의과대학 재활의학교실 및 재활의학연구소, 1한사랑 아산병원
Abstract
Objective
The aims of this study were to assess intention tremor severity caused by brain injury using tri-axial accelerometry and also to determine the reliability and the correlation with clinical measurements.
Method
Twenty two patients with intention tremor caused by brain injury were included. The quantitative measurement of tremor was performed using tri-axial accelerometry during finger to nose test. The dominant frequency and amplitude of tremor were acquired using Fast Fourier transformation analysis. The severity of tremor was also clinically rated by clinical rating scale for tremor, hand writing test, figure drawing test, pouring water test. The correlation between clinical measurement and tri-axial acce-lerometry measurement, and the inter-rater reliability were assessed.
Results
The tri-axial accelerometry measurement showed good inter-rater reliability. The mean dominant frequency was 3.10 Hz. The amplitudes at dominant frequency were significantly correlated with clinical rating scale for tremor, pouring water test (p<0.05) but not with hand writing test, figure drawing test.
Conclusion
Quantitative measurement of intention tremor using tri-axial accelerometry may be very useful to assess the tremor severity caused by brain injury. (J Korean Acad Rehab Med 2005; 29: 495-500)
Key Words: Brain injury, Tremor, Tri-axial accelerometry


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