国产bbaaaaa片,成年美女黄网站色视频免费,成年黄大片,а天堂中文最新一区二区三区,成人精品视频一区二区三区尤物

首頁> 外文學(xué)位 >Movement control and cortical activation in functional ankle instability.
【24h】

Movement control and cortical activation in functional ankle instability.

機(jī)譯：運動控制和皮質(zhì)激活功能性踝關(guān)節(jié)不穩(wěn)。

獲取原文
獲取原文并翻譯 | 示例
  • 摘要
  • 著錄項
  • 相似文獻(xiàn)
  • 相關(guān)主題

摘要

Background. Functional ankle instability (FI) is a common development following first-time lateral ankle sprain, resulting in functional limitations. Local tissue damage has not been a satisfactory explanation. Evidence exists of changes in motor control within the central nervous system in individuals with FI. Further investigation of the nature of these changes is warranted.;Methods. Twenty subjects with FI and twenty healthy control subjects allowed comparisons between ankles within groups and between groups. Two primary methods of investigation were used. A kinematic analysis using electromagnetic motion capture was used during a step down task to assess repeatability and variation in patterns of ankle dorsiflexion/plantarflexion and inversion/eversion motion and speed and phase timing characteristics. A normalized coefficient of multiple correlations was used for motion cycle comparisons, and means and variance were compared for discreet time variables. Motor control was measured with an accuracy index from an ankle tracking task. A sub-group of 8 right-involved FI subjects and 10 control subjects underwent functional magnetic resonance imaging to detect cortical activation in sensorimotor areas while performing the tracking task.;Results. With the step down task no between-group differences in the repeatability of ankle motions were found, although both groups showed greater variability in inversion/eversion than dorsiflexion/plantarflexion. Increased ankle instantaneous angular speed when contacting the step was found in the FI subjects, with trends to reversing instantaneous linear velocity and more rapid weight acceptance also noted. No differences in tracking accuracy were identified; however, differential patterns of lateralization of cortical activation were found within groups between ankles during the task, with greater contralateral hemisphere activity in the primary motor area and more symmetrical activity in the primary sensory cortex (S1) and supplementary motor areas in FI subjects tracking with the involved ankle than was observed in control subjects tracking with the right ankle. Between-group comparisons found areas of greater activation in left S1, premotor cortex, and anterior cingulate gyrus compared to control subjects.;Conclusions. The results of this study support that processing differences exist at the cortical level between FI and healthy control subjects. Motor performance differences are also present.
機(jī)譯：背景。功能性踝關(guān)節(jié)不穩(wěn)（FI）是首次出現(xiàn)外側(cè)踝關(guān)節(jié)扭傷后的常見發(fā)展，導(dǎo)致功能受限。局部組織損傷尚未令人滿意。有證據(jù)表明，F(xiàn)I患者中樞神經(jīng)系統(tǒng)內(nèi)的運動控制發(fā)生了變化。有必要進(jìn)一步研究這些更改的性質(zhì)。二十名患有FI的受試者和二十名健康對照組的受試者進(jìn)行了組內(nèi)和組間腳踝之間的比較。使用了兩種主要的調(diào)查方法。在下臺任務(wù)期間，使用電磁運動捕獲進(jìn)行了運動學(xué)分析，以評估可重復(fù)性以及踝背屈/ plant屈和內(nèi)翻/外翻運動以及速度和相位計時特性的模式變化。將多個相關(guān)性的歸一化系數(shù)用于運動周期比較，并比較離散時間變量的均值和方差。通過踝關(guān)節(jié)跟蹤任務(wù)的準(zhǔn)確性指數(shù)來測量運動控制。由8個右旋FI對象和10個對照對象組成的小組進(jìn)行功能磁共振成像，以在執(zhí)行跟蹤任務(wù)時檢測感覺運動區(qū)域的皮質(zhì)激活。進(jìn)行下沉任務(wù)時，雖然兩組的內(nèi)翻/外翻都比背屈/ plant屈表現(xiàn)出更大的變異性，但沒有發(fā)現(xiàn)踝關(guān)節(jié)運動重復(fù)性的組間差異。在FI受試者中發(fā)現(xiàn)，與腳步接觸時，踝關(guān)節(jié)的瞬時角速度增加，并且還出現(xiàn)了反向瞬時線速度和更快地接受體重的趨勢。沒有發(fā)現(xiàn)跟蹤準(zhǔn)確性的差異；然而，在該任務(wù)期間，踝關(guān)節(jié)之間的各組內(nèi)發(fā)現(xiàn)了皮質(zhì)激活的側(cè)向化差異模式，主要運動區(qū)的對側(cè)半球活動較大，而FI受試者跟蹤的主要感覺皮層（S1）和補(bǔ)充運動區(qū)的對稱活動更為對稱。與在追蹤右腳踝的對照受試者中觀察到的相比，腳踝受累。組間比較發(fā)現(xiàn)與對照組相比，左S1，運動前皮層和前扣帶回的活化程度更高。這項研究的結(jié)果支持FI和健康對照組之間的皮質(zhì)水平存在加工差異。電機(jī)性能也存在差異。

著錄項

  • 作者

    Anderson, Kathleen Marie.;

  • 作者單位

    University of Minnesota.;

  • 授予單位 University of Minnesota.;
  • 學(xué)科 Biology Neuroscience.;Health Sciences Rehabilitation and Therapy.
  • 學(xué)位 Ph.D.
  • 年度 2008
  • 頁碼 187 p.
  • 總頁數(shù) 187
  • 原文格式 PDF
  • 正文語種 eng
  • 中圖分類
  • 關(guān)鍵詞

相似文獻(xiàn)

  • 外文文獻(xiàn)
  • 中文文獻(xiàn)
  • 專利
獲取原文

客服郵箱：kefu@zhangqiaokeyan.com

京公網(wǎng)安備：11010802029741號 ICP備案號：京ICP備15016152號-6 六維聯(lián)合信息科技 (北京) 有限公司?版權(quán)所有

  • 客服微信

  • 服務(wù)號