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| Quantitative assessment of foot sensitivity: The effects of foot sole skin temperature, blood flow at the foot area and footwear Der Einfluss der Temperatur der Fußsohle, des Blutflusses im Fußbereich und des Schuhwerks auf die plantare Fußsensibilität | |
| Schlee;Günther | |
| 出版年 | 2010 |
| 学位授予单位 | Universitätsbibliothek Chemnitz |
| 英文摘要 | The human foot has been accepted over the years as an important source of afferent input, used not only in the recognition of the surrounding environment (e.g. hard and soft surfaces), but also in the fine regulation of common daily-live movements (e.g. gait and balance control). The performance of these movements is usually accompanied by fluctuations in foot skin temperature as well as reciprocal blood flow changes at the foot area. Moreover, both variables are likely to be affected by footwear usage. Although these three factors are constantly present during the performance of daily live movements, only little and partially controversial information regarding the effects of foot skin temperature, blood flow at the foot area and footwear on foot sensitivity can be found in the literature. Therefore, the goal of the thesis was to investigate the effects of foot skin temperature, blood flow at the foot area and footwear on plantar foot vibration sensitivity of healthy young subjects. Three single studies were performed in order to investigate each variable separately. The first study investigated the influence of foot sole skin temperature on plantar foot sensitivity of 40 healthy subjects. Vibration thresholds were measured at 200Hz at a initial baseline temperature and after cooling/warming the foot skin 5-6 °C. The second study investigated the influence of short-time lower leg ischemia on plantar foot vibration sensitivity of 39 young adults. Lower leg ischemia was evoked with a pneumatic tourniquet, placed about 10cm above the popliteus cavity. Vibration thresholds were measured at 200 Hz in three different cuff pressure conditions: baseline (0 mmHg), low (50 mmHg) and high (150 mmHg). Finally, the influence of footwear on foot sensitivity was investigated in the third study, using specific Formula 1 shoes. Twenty-five male subjects participated in the study. Plantar foot vibration thresholds were measured at 30 and 200 Hz in five different foot/shoe conditions (barefoot and four shoe conditions). In all studies, vibration thresholds were measured at three anatomical locations of the plantar foot: heel, first metatarsal head (MET I) and hallux. The main results of the three studies show that the analysed variables significantly influence plantar foot vibration sensitivity. Data from the first study show that 5-6 °C alterations in foot skin temperature significantly influence the foot sensitivity of healthy young adults, whereby skin cooling results in reduced foot sensitivity, whereas skin warming improves plantar foot vibration sensitivity. The results of the second study indicate that short-time lower leg ischemia; especially regarding the high cuff pressure condition (150 mmhg), significantly reduces plantar foot sensitivity. Data from the third study show that the footwear effects on foot sensitivity are frequency-dependent. While barefoot sensitivity is better than shod sensitivity at 30Hz, shod sensitivity is better than barefoot sensitivity when measured at 200Hz. In conclusion, foot sole skin temperature, blood flow at the foot area and footwear significantly influence the plantar foot vibration sensitivity of healthy young adults. The alterations in foot sensitivity caused by these variables have important consequences for future clinical as well as movement-related research. Future clinical applications of quantitative sensory testing should consider the influence of these three factors during the assessment of sensory data, in order to standardize the measurement procedures as well as to enhance the quality of the collected data. Regarding the movement-related research, further studies should try to identify the importance of foot sensitivity for the performance of different types of movements (including sport-related activities). Additionally, the combined effects of movement-related changes in foot skin temperature and blood flow should be analysed and integrated in the development process of functional footw |
| 英文关键词 | Fu?sensibilit?t Vibrationssensibilit?t Blutfluss Schuhwerk Foot sensitivity Vibration sensitivity Temperature Blood flow Footwear Ddc:300 Ddc:610 Fu? Temperatur |
| 语种 | 德语 |
| URL | http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-61000 |
| 来源机构 | Universitätsbibliothek Chemnitz |
| 资源类型 | 学位论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/244793 |
| 推荐引用方式 GB/T 7714 | Schlee;Günther. Quantitative assessment of foot sensitivity: The effects of foot sole skin temperature, blood flow at the foot area and footwear Der Einfluss der Temperatur der Fußsohle, des Blutflusses im Fußbereich und des Schuhwerks auf die plantare Fußsensibilität[D]. Universitätsbibliothek Chemnitz,2010. |
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