Development of diagnosis support system of adiadochocinesis in cerebellar ataxia
 using Leap Motion Controller

Naoki Kamiya, Yuichi Konishi, Asumi Kamiya

ABSTRACT The cerebellar ataxia is ataxia caused by cerebellar disease. There is no abnormally in the deep sensation and muscle strength even though it refers to occur ataxia. This disorder is defined six parts as â€œdysmetriaâ€, â€œadiadochocinesisâ€, â€œdecompositionâ€, â€œasynergiaâ€, â€œtremorâ€ and â€œdyschronometriaâ€. Hand pronation supination test is used for diagnostic testing of adiadochocinesis. This test is carried out in the following procedure. First, lift forward the upper limb, then, facing up the palm and to pronationsupination at maximum speed. In this case, the physician to check the rotational speed of the hand, irregularities in the rotation and the difference of bilateral difference. Currently, these tests are carried out visually by the physician, it can be said that subjective diagnosis. In addition, a quantitative analysis for ataxia are has been performed various studies, but the studies to attempt pronation-supination test without contact does not exist. To the problem of the subjective diagnosis, the solution that the diagnosis using a sensor is a heavy burden for the patient. Therefore, by establishing an automatic diagnosis without contact, it is expected to reduce the burden on the patient and objective diagnosis. In this study, we developed a diagnostic support system for the hand pronation supination test without contact sensor. In order to achieve this test without contact, we use the â€œLeap Motion Controllerâ€. We have developed a system for calculating the rotation speed and irregularity of rotation by right and left hand. By using this system, we evaluated the experiments with four healthy subjects. As a result, it was possible to obtain good results in each evaluation item; the rotation speed is high, the irregularity is small and left-right difference is small. In addition, to verify the accuracy of the proposed method, we examined the number of rotations and the rotation angle. As a result, it could be measured within max. 5 degrees error of rotation angle and average 3.5 times error of the number of rotations. Consequently, it can be said to be capable of using the proposed system to index the automatic quantitative measurement with high reproducibility. Keywords: Hand pronation supination test, Adiadochokinesis, Leap Motion Controller, Computer-aided Diagnosis

Title:	Development of diagnosis support system of adiadochocinesis in cerebellar ataxia using Leap Motion Controller
Author Name:	Naoki Kamiya, Yuichi Konishi, Asumi Kamiya
Abstract:	ABSTRACT The cerebellar ataxia is ataxia caused by cerebellar disease. There is no abnormally in the deep sensation and muscle strength even though it refers to occur ataxia. This disorder is defined six parts as â€œdysmetriaâ€, â€œadiadochocinesisâ€, â€œdecompositionâ€, â€œasynergiaâ€, â€œtremorâ€ and â€œdyschronometriaâ€. Hand pronation supination test is used for diagnostic testing of adiadochocinesis. This test is carried out in the following procedure. First, lift forward the upper limb, then, facing up the palm and to pronationsupination at maximum speed. In this case, the physician to check the rotational speed of the hand, irregularities in the rotation and the difference of bilateral difference. Currently, these tests are carried out visually by the physician, it can be said that subjective diagnosis. In addition, a quantitative analysis for ataxia are has been performed various studies, but the studies to attempt pronation-supination test without contact does not exist. To the problem of the subjective diagnosis, the solution that the diagnosis using a sensor is a heavy burden for the patient. Therefore, by establishing an automatic diagnosis without contact, it is expected to reduce the burden on the patient and objective diagnosis. In this study, we developed a diagnostic support system for the hand pronation supination test without contact sensor. In order to achieve this test without contact, we use the â€œLeap Motion Controllerâ€. We have developed a system for calculating the rotation speed and irregularity of rotation by right and left hand. By using this system, we evaluated the experiments with four healthy subjects. As a result, it was possible to obtain good results in each evaluation item; the rotation speed is high, the irregularity is small and left-right difference is small. In addition, to verify the accuracy of the proposed method, we examined the number of rotations and the rotation angle. As a result, it could be measured within max. 5 degrees error of rotation angle and average 3.5 times error of the number of rotations. Consequently, it can be said to be capable of using the proposed system to index the automatic quantitative measurement with high reproducibility. Keywords: Hand pronation supination test, Adiadochokinesis, Leap Motion Controller, Computer-aided Diagnosis
Cite this article:	Naoki Kamiya, Yuichi Konishi, Asumi Kamiya , " Development of diagnosis support system of adiadochocinesis in cerebellar ataxia using Leap Motion Controller " , International Journal of Application or Innovation in Engineering & Management (IJAIEM), Volume 3, Issue 8, August 2014 , pp. 040-047 , ISSN 2319 - 4847.
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