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The effect of age on electromyographic and kinematic responses to electrical stimulation of the distal tibial nerve during walkingGaur, Amit 13 August 2014 (has links)
In young healthy adults, characteristic obstacle avoidance reflexes (stumble corrective) were elicited with electrical stimulation during walking that were dependent on the anatomical location of cutaneous afferents stimulated (sole versus dorsum of the foot). We previously demonstrated an age-related erosion of these stumble corrective responses when the perturbation was applied to the dorsum of the foot. However, it is unknown whether similar age-related reflex erosion is present with stimulation to the sole of the foot. The purpose of this study was to identify age-dependent differences in stumbling reactions to electrically evoked stimulation of the tibial nerve at the ankle during walking in healthy young (19-39) and older adult (70 years and older) groups. Electromyograms (EMG) of the tibialis anterior (TA), soleus (SOL), medial gastrocnemius (MG), biceps femoris (BF) and vastus lateralis (VL) were recorded along with gait kinematics including angular displacement and velocity at the ankle and knee joint as well as toe clearance relative to the walking surface. The main finding of this study was the significant erosion of the kinematic and EMG stumbling reactions seen in the older adults compared to the young. Specifically, during mid-swing phase, there was reduced peak toe clearance and significantly smaller amplitudes in ankle dorsiflexion and knee flexion angular displacement as well as absent responses in TA and MG in older adults compared to the young. Further, these degraded responses were superimposed on altered mid-swing phase kinematics during unstimulated walking in the older adults showing reduced toe clearance, knee flexion and increased ankle dorsiflexion compared to the young. This combination of degraded reflexes and altered unstimulated kinematics resulted in significantly reduced toe clearance in the older adults and could suggest that these adults are in the prodromal stage of fall risk. / Graduate / 0566
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Development and Application of a Virtual Reality Stumble Method to Test an Angular Velocity Control OrthosisMontgomery, Whitney S. 05 June 2013 (has links)
The Ottawalk-Speed (OWS) orthosis prevents knee collapse in stumble situations. The purpose of this study was to develop a virtual stumble perturbation to measure OWS response to a knee collapse when walking. A new split speed perturbation was developed for the CAREN virtual reality system. This perturbation induced a stumble with increased knee flexion for five able-bodied participants, with either a hopping or stopping recovery strategy. Three knee-ankle-foot orthosis users were subjected to five stumble trials while wearing the OWS. OWS participants used a straight-legged recovery strategy, and extended the knee through recovery weight acceptance. Therefore, the split speed perturbation was not appropriate to measure OWS response to a stumble since knee collapse did not occur. The OWS allowed free knee motion during gait. Further study is required to measure OWS response during a stumble with a knee collapse event.
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Development and Application of a Virtual Reality Stumble Method to Test an Angular Velocity Control OrthosisMontgomery, Whitney S. January 2013 (has links)
The Ottawalk-Speed (OWS) orthosis prevents knee collapse in stumble situations. The purpose of this study was to develop a virtual stumble perturbation to measure OWS response to a knee collapse when walking. A new split speed perturbation was developed for the CAREN virtual reality system. This perturbation induced a stumble with increased knee flexion for five able-bodied participants, with either a hopping or stopping recovery strategy. Three knee-ankle-foot orthosis users were subjected to five stumble trials while wearing the OWS. OWS participants used a straight-legged recovery strategy, and extended the knee through recovery weight acceptance. Therefore, the split speed perturbation was not appropriate to measure OWS response to a stumble since knee collapse did not occur. The OWS allowed free knee motion during gait. Further study is required to measure OWS response during a stumble with a knee collapse event.
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Tutoring System for Smartphone Text Input for Older Adults using Statistical Stumble Detection / 統計的つまずき検出を用いた高齢者のためのスマートフォンテキスト入力チュータリングシステムHagiya, Toshiyuki 26 March 2018 (has links)
京都大学 / 0048 / 新制・課程博士 / 博士(情報学) / 甲第21207号 / 情博第660号 / 新制||情||114(附属図書館) / 京都大学大学院情報学研究科知能情報学専攻 / (主査)教授 河原 達也, 教授 黒橋 禎夫, 教授 石田 亨 / 学位規則第4条第1項該当 / Doctor of Informatics / Kyoto University / DFAM
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Confrontation: Endeavors in FutilityBarlow, Gabriel Lashley 01 January 2007 (has links)
This paper is intended to compliment and describe the body of work that has been produced within the time I have been enrolled as a graduate student at Virginia Commonwealth University's Photography and Film department. The paper will include information on both my MFA candidacy presentation as well as a description of the evolution of my artistic endeavors. The main focus of this document is to discuss my formal examination of performance based video works pertaining to the absurd as described by Camus, and later expressed by Samuel Beckett, also the role of the masculine body's physicality within ritualized actions.
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不整地歩行シミュレーションシステムの開発櫻井, 伸二, 矢部, 京之助, 池上, 康男, 石田, 浩司, 近藤, 孝晴 02 1900 (has links)
科学研究費補助金 研究種目:基盤研究(B)(2) 課題番号:10558001 研究代表者:櫻井 伸二 研究期間:1998-2000年度
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