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Miyazaki-shi, Japan

Kuwae Y.,Daigo Hospital | Sekine M.,Osaka Electro-Communication University | Tamura T.,Osaka Electro-Communication University | Fujimoto T.,Fujimoto Hospital | Yu W.,Chiba University
Transactions of Japanese Society for Medical and Biological Engineering | Year: 2015

Walking and balance tests are used for evaluating the effects of rehabilitation and the time taken to perform the test. The Four Square Step Test (FSST) is a useful test for evaluating balance in patients with stroke and orthopedic diseases. For the FSST, 4 bars are used to divide a floor surface into 4 areas. Subjects have to step from one area into the neighboring area in a sequence, and their movements and stability are evaluated. However, no detailed evaluation has been conducted on the transition of the forward, backward, right, and left movement phases. This study aimed at detailed evaluation of the FSST in post-stroke hemiplegic patients and elderly subjects, using wearable motion sensors comprising an accelerometer and angular velocity sensors capable of identifying the direction of the subjects' movements. Twelve post-stroke hemiplegic patients (6 left hemiplegic patients, 6 right hemiplegic patients; Brunnstrom stage of the lower limb: V) and 6 normal elderly subjects were studied. The sensor was attached to the waist and both thighs of a subject. Then FSST was administered and a video was recorded simultaneously. Using the angular velocity signals of the thigh, the four movement phases in FSST were classified. The following items were analyzed: root mean square (RMS) acceleration, RMS angular velocity, amplitude of the thigh angle, and amplitude/performing time. The time measured by the wearable motion sensors correlated with the time recorded by the monitoring video (r= 0.88, p < 0.05). The total performing time did not differ significantly between normal elderly subjects and hemiplegic patients. The RMS acceleration and RMS angular velocity for the waist were significantly different between normal elderly subjects and hemiplegic patients (p < 0.05). Furthermore, the changes in the thigh angle of patients when they stepped over the bars while performing the FSST were different between hemiplegic patients and normal elderly subjects. We conclude that the FSST using wearable motion sensors is useful for the evaluation of balance in post-stroke hemiplegic patients. © 2015, Japan Soc. of Med. Electronics and Biol. Engineering. All rights reserved. Source

Tsuji M.,Chiba University | Higashi Y.,Fujimoto Hayasuzu Hospital | Fujimoto T.,Fujimoto Hayasuzu Hospital | Sekine M.,Chiba University | And 2 more authors.
Transactions of Japanese Society for Medical and Biological Engineering | Year: 2010

We developed a computer-based neuropsychological test (CBT) using a personal computer with a touch panel that was easily operated by elderly individuals to evaluate the cognitive functioning of members of this population. Although elderly patients have been participating in exercise as part of their occupational therapy (OT) for cognitive impairment, discussions about the effectiveness of this modality are rare. This study evaluated this treatment approach in terms of changes in the patients'cognitive functioning. We administered the CBT and Mini-Mental State Examination (MMSE) before and after therapy. The results revealed that cut-off scores on the MMSE and CBT were highly correlated, but the therapeutic effect of the OT intervention could not bejudged. Source

Tmaura T.,Osaka Electro-Communication University | Zakaria N.A.,Nara Institute of Science and Technology | Kuwae Y.,Daigo Hospital | Sekine M.,Osaka Electro-Communication University | And 2 more authors.
Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS | Year: 2013

We performed a quantitative analysis of the fall-risk assessment test using a wearable inertia sensor focusing on two tests: the time up and go (TUG) test and the four square step test (FSST). These tests consist of various daily activities, such as sitting, standing, walking, stepping, and turning. The TUG test was performed by subjects at low and high fall risk, while FSST was performed by healthy elderly and hemiplegic patients with high fall risk. In general, the total performance time of activities was evaluated. Clinically, it is important to evaluate each activity for further training and management. The wearable sensor consisted of an accelerometer and angular velocity sensor. The angular velocity and angle of pitch direction were used for TUG evaluation, and those in the pitch and yaw directions at the thigh were used for FSST. Using the threshold of the angular velocity signal, we classified the phase corresponding to each activity. We then observed the characteristics of each activity and recommended suitable training and management. The wearable sensor can be used for more detailed evaluation in fall risk management. The wearable sensor can be used more detailed evaluation for fall-risk management test. © 2013 IEEE. Source

Funayama M.,Red Cross | Nakagawa Y.,Edogawa Hospital | Yamaya Y.,Edogawa Hospital | Yoshino F.,Daigo Hospital | And 2 more authors.
BMC Neurology | Year: 2013

Background: Due to the nature of neurodegenerative disorders, patients with primary progressive aphasia develop cognitive impairment other than aphasia as the disorder progresses. The progression of logopenic variant primary progressive aphasia (lvPPA), however, has not been well described. In particular, praxic disorders and semantic memory deficits have rarely been reported. Case presentations: We report three patients in the initial stage of lvPPA who subsequently developed apraxia in the middle stage and developed clinically evident semantic memory deficits in the advanced stages.Conclusions: The present case series suggests that some patients with lvPPA develop an atypical type of dementia with apraxia and semantic memory deficits, suggesting that these cases should be classified as a type of early-onset Alzheimer's disease. © 2013 Funayama et al.; licensee BioMed Central Ltd. Source

Miyoshi H.,Sharp Corporation | Numata T.,Chiba University | Kuwae Y.,Chiba University | Sekine M.,Chiba University | And 5 more authors.
Electronics and Communications in Japan | Year: 2012

This study quantitatively compared lower limb motility of normal subjects and those requiring Support Level 1 (support-1). We developed a wireless inertial sensor with an embedded triaxial accelerometer and angular velocity sensor. Six normal elderly subjects and ten elderly subjects who were classified as support-1 by the Japanese care insurance system participated in the study. We attached the wireless motion sensors to the center of the lower back and both thighs of the subjects. The subjects were then asked to walk 10 m and perform a stepping exercise. For the evaluation, the cadence, pitch angle, and pitch angular velocity of the thigh autocorrelation function and root mean square (RMS) on the lower back were calculated. The autocorrelation coefficient function for the support-1 subjects was smaller than for the normal subjects, while the RMS was larger in support-1. These differences indicated that the gait and balance abilities of the support-1 subjects were poorer than those of the normal subjects. This suggests that our wireless motion sensor is useful for assessing the motility of the lower limbs while walking and climbing steps. © 2012 Wiley Periodicals, Inc. Source

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