Faculty Profiles - NAKAMURA Takao

Papers - NAKAMURA Takao

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波形特徴を利用したペンドラムテスト時の下腿部支持力推定 Reviewed

道西博行, 中村隆夫, 軸屋和明, 山本尚武, 椿原彰夫

電子情報通信学会論文誌D J108-D ( 5 ) 393 - 401 2025.5

ペンドラムテスト開始後に残る下腿部支持力の推定 Reviewed

道西博行, 楠原俊昌, 中村隆夫, 軸屋和明, 山本尚武, 岡本卓爾, 椿原彰夫

電子情報通信学会論文誌D J106-D ( 5 ) 349 - 356 2023.5

Transepidermal Water Loss Estimation Model for Evaluating Skin Barrier Function Reviewed

Osamu Uehara, Toshimasa Kusuhara, Takao Nakamura

Advanced Biomedical Engineering 12 1 - 8 2023.2

Skin Electrical Impedance Model for Evaluation of the Thickness and Water Content of the Stratum Corneum Reviewed

Osamu Uehara, Toshimasa Kusuhara, Kenichi Matsuzaki, Yoshitake Yamamoto, Takao Nakamura

Advanced Biomedical Engineering 11 98 - 108 2022.4

Evaluation of Skeletal Muscle Dysfunction Associated With Acute Inflammation by Electrical Impedance Myography: A Case Report on Skeletal Muscle Dysfunction After Cardiac Surgery and Literature Review Reviewed International journal

Hiroki Sato, Takao Nakamura

Cureus 13 ( 12 ) e20166 2021.12

Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：Cureus, Inc.

Electrical impedance myography (EIM) is an evaluation technique for skeletal muscles that uses electrical impedance technology. Recent reviews have shown that EIM is useful as a method to assess changes in skeletal muscle quality and quantity with aging. These may be utilized for functional changes in inflammatory skeletal muscles, such as disease and operation. In this report, the impedance parameters using EIM present perioperative skeletal muscle changes in patients after cardiac surgery. In addition, we will describe the efficacy of EIM in skeletal muscle dysfunction due to inflammation or disease. This study aimed to elucidate the efficacy of EIM in acute inflammation-associated skeletal muscle dysfunction.

DOI： 10.7759/cureus.20166

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A Pendulum-test Model Having Stimuli from CNS as Inputs-An Approach to Two-demensional Index for Phasic Refrex- Reviewed

道西博行, 中村隆夫, 楠原俊昌, 軸屋和明, 山本尚武, 岡本卓爾, 椿原彰夫

電子情報通信学会論文誌 D(Web) J104-D ( 2 ) 143 - 150 2021

Effectiveness of impedance parameters for muscle quality evaluation in healthy men. Reviewed

Hiroki Sato, Takao Nakamura, Toshimasa Kusuhara, Kobara Kenichi, Katsushi Kuniyasu, Takaki Kawashima, Kozo Hanayama

The journal of physiological sciences : JPS 70 ( 1 ) 53 - 53 2020.10

Language：English Publishing type：Research paper (scientific journal)

We investigated the relationship between impedance parameters and skeletal muscle function in the lower extremities, as well as the effectiveness of impedance parameters in evaluating muscle quality. Lower extremity impedance of 19 healthy men (aged 23-31 years) measured using the direct segmental multi-frequency bioelectrical impedance analysis were arc-optimized using the Cole-Cole model, following which phase angle (PA), [Formula: see text], and β were estimated. Skeletal muscle function was assessed by muscle thickness, muscle intensity, and isometric knee extension force (IKEF). IKEF was positively correlated with PA (r = 0.58, p < 0.01) and β (r = 0.34, p < 0.05) was negatively correlated with [Formula: see text] (r = - 0.43, p < 0.01). Stepwise multiple regression analysis results revealed that PA, β, and [Formula: see text] were correlated with IKEF independently of muscle thickness. This study suggests that arc-optimized impedance parameters are effective for evaluating muscle quality and prediction of muscle strength.

DOI： 10.1186/s12576-020-00780-z

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Instantaneous Measurement of Electrical Parameters in a Palm Daring Electrodermal Activity Reviewed

IEEE Transactions on Instrumentation and Measurement 45 ( 2 ) 483 - 487 1996.4

Automatic Sensing Device of Electrical Characteristics of Living Trees Reviewed

Yoshitake Yamamoto, Hiroshi Harada, Kiyotaka Yasuhara, Takao Nakamura

IEEE Transactions on Instrumentation and Measurement 44 ( 3 ) 729 - 732 1995

Fundamental characteristics of human limb electrical impedance for biodynamic analysis Reviewed

T. Nakamura, Y. Yamamoto, T. Yamamoto, H. Tsuji

Medical & Biological Engineering & Computing 30 ( 5 ) 465 - 472 1992.9

Detection of knee-joint motions using two linear accelerometers for pendulum test Reviewed

Toshimasa Kusuhara, Kazuaki Jikuya, Takao Nakamura, Hiroyuki Michinishi, Yoshitake Yamamoto, Takuji Okamoto

ELECTRONICS AND COMMUNICATIONS IN JAPAN 95 ( 7 ) 41 - 48 2012.7

Detection Method of Knee-joint Motions Using Two Linear Accelerometers for Pendulum Test Reviewed

Toshimasa Kusuhara, Kazuaki Jikuya, Takao Nakamura, Hiroyuki Michinishi, Yoshitake Yamamoto, Takuji Okamoto

IEEJ Transactions on Electronics, Information and Systems 131 ( 9 ) 1564 - 1569 2011

ANALYSIS OF EFFECT FOR RADIATION EXPOSURE TO CULTURED CELLS USING ELECTRICAL CELL-SUBSTRATE IMPEDANCE SENSING (ECIS) METHOD Reviewed

Noriko Goda, Yoshitake Yamamoto, Takao Nakamura, Toshinori Maruyama, Toshimasa Kusuhara, Satoshi Mohri, Noriyuki Kataoka, Fumihiko Kajiya

Biocybernetics and Biomedical Engineering 27 ( 1 ) 223 - 232 2007

Quantitative evaluation of micromotion of cultured cells using electrical cell-substrate impedance sensing (ECIS) method -cell-to-cell distance and cell-to-substrate distance- Reviewed

GODA Noriko, YAMAMOTO Yoshitake, NAKAMURA Takao, KUSUHARA Toshimasa, MARUYAMA Toshinori

岡山大学医学部保健学科紀要 17 ( 1 ) 2007

Formative Mechanism of Skin Potential Activity and Relationships between Skin Potential and Skin Impedance

K. Shirai, Y. Yamamoto, T. Nakamura, T. Kusuhara

WORLD CONGRESS ON MEDICAL PHYSICS AND BIOMEDICAL ENGINEERING 2006, VOL 14, PTS 1-6 14 2694 - 2697 2007

Parameter analysis of impedance pharyngography (IPG) for assessment of swallowing function Reviewed

Toshimasa Kusuhara, Takao Nakamura, Yasuhiro Shirakawa, Keiko Mori, Yoshio Naomoto, Yoshitake Yamamoto

Systems and Computers in Japan 37 ( 13 ) 20 - 27 2006.11

Parameter Analysis of Impedance Pharyngography (IPG) for Assessment of Swallowing Function Reviewed

KUSUHARA Toshimasa, NAKAMURA Takao, SHIRAKAWA Yasuhiro, MORI Keiko, NAOMOTO Yoshio, YAMAMOTO Yoshitake

The IEICE transactions on information and systems Pt. 2 J88-D-Ⅱ ( 7 ) 1291 - 1297 2005.7

Impedance pharyngography to assess swallowing function Reviewed

T Kusuhara, T Nakamura, Y Shirakawa, K Mori, Y Naomoto, Y Yamamoto

JOURNAL OF INTERNATIONAL MEDICAL RESEARCH 32 ( 6 ) 608 - 616 2004.11

Development of stepping measurement device for evaluation of and training in walking Reviewed

14 ( 2 ) 135 - 139 2004.3

Authorship：Lead author Language：Japanese

Although gait training equipment such as the bicycle ergometer and treadmill exists for patients whose walking ability is high, there is no appropriate gait trainingmethod or training instrument for patients whose walking ability has become impaired, who often use a cane or walker, etc. in the course of daily life. In the case of gait training for persons whose walking ability involves impaired locomotion, there is always the danger of a fall. Consequently, a caregiver is required, and the effect of the training is cut by half because the patient's anxiety about falling is exacerbated. Slow stepping affords strengthening and balance training of the leg muscles for patients whose walking ability has become low, and walkingability is improved. However, whether such training appropriately carries out stepping and the degree of the effect of such training has not been evaluated. Therefore, we have developed a stepping measurement device that monitors stepping for evaluation and training of walking ability. This system consists of two mat switches for stepping, a measuring circuit for stepping detection, and abook-sized personal computer with a PC card-type AD converter. This system can detect a left or right single stance phase and a double stance phase relative to theON, OFF condition of the mat switch. After measurement, the following items are analyzed and displayed: ・number of steps, ・average time of double stance phase, ・the average time of single stance phase, and so on. Finally, we measured the stepping of subjects whose walking ability is low, and showed the relationship between daily walking conditions and stepping conditions. The effectiveness of this system was considered in light of the results.

DOI： 10.18926/15199

Quantitative evaluation method of swallowing hypofunctionby aging using Impedance Pharyngography (IPG) Reviewed

15 ( 1 ) 1 - 7 2004

Language：Japanese

Impedance Pharyngography (IPG) measures neck electrical impedance during swallowing. IPG method is simple procedures and the technique which can perform noninvasiveevaluation of swallowing function. IPG waveform reflects swallowing function. However, the influence on IPG waveform by swallowing hypofunction is various by the causes. That is, it will be dependent on a measurement person's subjectivity to compare directly IPG waveforms of subjects whose states of swallowing function differs, andobjectivity is missing.

DOI： 10.18926/15189

Other Link： http://search.jamas.or.jp/link/ui/2005101494

Development of human limb volume meter for evaluation of edema Reviewed

14 ( 1 ) 31 - 35 2003.12

Authorship：Lead author Language：Japanese

Quantitative evaluation of the edema is important for perinatal medicine. In a conventional method, the volume of human limb has been estimated by 2 circumferences of the measurement position, which is measured with the tape measure. However, the following errors makes this measurement insufficient; ・the error by the way of winding of a measure to the measurement position, ・the error between volume of model geometry of measurement position and one of real shape of measurement position and so on.Then, we have developed a volume meter of human limb for the edema evaluation, which is high precision and suitable for the everyday use. Archimedes' principle was applied as this measurement principle. The mass change of water tankwith water, when the measurement part water in, was converted to volume of measurement part. The linearity, resolution, stability. reproducibility of the volume meter was investigated. Considering these results, we found that the specification of this equipment was high precise as follows; maximum volume of 25,000 cm(3), resolutionof 1 cm(3), nonlinearity of 0.007%. We also measured the diurnal volume change of foot and lower leg in three subjects. We found that the differences between foot and lower leg or among the subjects. The developed volume meter can be expected to apply to quantitative evaluationof the edema.

DOI： 10.18926/15205

Other Link： http://search.jamas.or.jp/link/ui/2004171082

Impedance Pharyngography for Diagnosis of Swallowing Disorders Reviewed

Yoshitake Yamamoto, Takao Nakamura, Toshimasa Kusuhara, Keiko Mori

Biocybernetics and Biomedical Engineering 22 ( 4 ) 97 - 103 2002

Consideration to the change of swallowing sense after operation of esophagus cancer - Evaluation of swallowing activity by using IPG and swallowing sound - Reviewed

12 ( 1 ) 53 - 62 2001

Language：Japanese

The esophagus cancer patient is conscious of passage disorder due to esophagus tumor, to greater or less degrees. Many of patients diagnosed as the esophagus cancerdecide to take operation, because they want to come to be able to eat as easily as before they are diagnosed as esophagus cancer. However many patients encounter the change of swallowing sense. In the long run, they must swallow consciously when they eat everything. They are not informed about the change of swallowing sense. Therefore, the patient feels strong anxiety when they noticed about the change. This time, we had an interview about the change of swallowing sense after operation to the patient. In addition, we measured the swallowing activity by using IPG and swallowing sound. As a result, all patients is conscious of the change of swallowing sense. And we noticed the change of IPG wave and the swallowing sound occurred except Pharynx period. So patients want to be informed about the change of swallowing sense strongly before they take operation. And it is necessary for the patient to be informed about the change of swallowing before they take operation.

DOI： 10.18926/15243

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Other Link： http://search.jamas.or.jp/link/ui/2002153551

Modelling of interface construction relating to power-line interference phenomenon in biopotential signal measurement system Reviewed

Adli, Yamamoto Yoshitake, Nakamura Takao

10 ( 2 ) 107 - 115 2000

Authorship：Last author Language：English

A modelling of interface construction relating to power-line interference phenomenon was described. Source of interference was displacement currents which flowed from AC power-line configuration (APC) to a model. The interference depends on some factors: distance between the APC and a model ; length of unshielded leads ; position of the APC in vertical or horizontal direction ; and skin-electrode impedances which were balance or unbalanced. The position of APC and skin-electrode impedances were important in contributing of the interference. The interference was still large even though skin-electrode impedances were balance. This was caused by the disagreement in two displacement currents. It was overcame by adjustment of APC in vertical direction. As a result, total interference would be very small or zero. The result shows that interference in ECG signal recording can be eliminated to about 10 μV. Although interference of power-lines is a complicated phenomenon, the problem is easier to understand by using this modelling.

DOI： 10.18926/11726

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Neck electrical impedance for measurement of swallowing Reviewed

Yoshitake Yamamoto, Takao Nakamura, Yasuhiko Seki, Kinya Utsuyama, Ken Akashi, Kazuaki Jikuya

Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi) 130 ( 4 ) 35 - 44 2000

上肢運動に伴う生体電気インピーダンスのパラメータ変動(共著) Reviewed

中村隆夫、山本尚武

岡山大学医学部保健学科紀要 10 ( 1 ) 15 - 22 1999.12

Studies on eliminating interference by electromagnetic induction from power line in ECG Signals(共著) Reviewed

Frontier of Medical and Biological Engineering 9 ( 3 ) 229 - 239 1999.3

Welfare Supported Engineering toward Aging Society. Neck Electrical Impedance for Measurement of Swallowing. Reviewed

電気学会論文誌 A 118-A ( 3 ) 210 - 217 1998.3

Principle of Biodynamic Analysis Using Human Limb Electrical Impedance (共著) Reviewed

NAKAMURA T, YAMAMOTO Y

Memoirs of the Faculty of Engineering, Okayama University 30 ( 1 ) 19 - 24 1995.12

Distance and velocity meter for human motion analysis Reviewed

T. Nakamura, Y. Yamamoto, T. Yamamoto, H. Tsuji

Medical & Biological Engineering & Computing 32 ( 1 ) 115 - 118 1994.1

Studies on Igniter for Torch Reviewed

YAMAMOTO Yoshihiro, INAGE Akira, NAKAMURA Takao

Research report of Takamatsu National College of Technology ( 29 ) 73 - 87 1993

New Equivalent Circuit for Electrical Impedance of Botanical Tissues. Reviewed

中村隆夫, 山本尚武, 山本辰馬, SONG Z

電子情報通信学会論文誌 D-2 75 ( 11 ) 1975 - 1977 1992

MEASUREMENT AND ANALYSIS OF RUNNING : Application of Bioelectrical Impedance and Distance-Velocity Meter Reviewed

NAKAMURA Takao, YAMAMOTO Yoshitake, YAMAMOTO Tatsuma, TSUJI Hiroaki

Biomechanisms 11 43 - 55 1992

Authorship：Lead author Language：Japanese Publisher：Society of Biomechanisms

This paper describes motion analyses during running which used distance-velocity meter and bioelectrical impedance method. The distance-velocity meter is constructed of a rotary encoder, a string of high strength and high elasticity, and a guide wire. It gives information on the distance and velocity of the runner in every running point with high precision. A lower leg electrical impedance is used in this bioelectrical impedance method. This method gives information on landing point, take-off point, ankle angle and so on during running. Impedance wave form is able to observe intuitively the motion of running and to divide the running period. Using these results, we can analyze running in relation to stride length, pitch,running speed and running form. First, the measurement system is described in terms of construction, performance and measure ment method. The accuracy of measurement in distanceis ±(0.03%+0.8cm). The accuracy of measurement in velocity of running is 1% for an average distance over 48cm. The non-linearity of impedance measurement by telemetry is ±0.5% to the extent of ±10 ohms. The measuring area is about 100m from the antenna. Next, the method of running is analyzed. Impedance wave form during running is discussed in relation to the running motion. The results show that the characteristics of various running forms appear in the wave form of lower leg impedance. The stride length is also determined with the accuracy of about 1%. Last, this method is applied for 100m and middle-distance races, and discussed. This measurement system is simple and easy to handle. Hence, it can also be used for analysis of other field and track events-hurdle races or running broad jump, for example.

DOI： 10.3951/biomechanisms.11.43

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Measurement of reaction time in agility using bio-electrical impedance. Reviewed

山本尚武, 中村隆夫, 山本辰馬, 辻博明

電子情報通信学会論文誌 D-2 74 ( 1 ) 1991

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Papers - NAKAMURA Takao