Repository logo
  • English
  • 中文
Log In
Have you forgotten your password?
  1. Home
  2. College of Medicine / 醫學院
  3. Physical Therapy / 物理治療學系所
  4. Roles of Premotor Cortex in Proactive Postural Control Associated with A Rapid Stepping Task in Patients with Stroke
 
  • Details

Roles of Premotor Cortex in Proactive Postural Control Associated with A Rapid Stepping Task in Patients with Stroke

Date Issued
2008
Date
2008
Author(s)
Chang, Wen-Hsing
URI
http://ntur.lib.ntu.edu.tw//handle/246246/181438
Abstract
Objective: To investigate the influence of PMC lesion on human proactive postural control as well as the preparation and selection of lower extremity voluntary movement by comparing the performance on proactive postural control and voluntary movement during a rapid stepping task between patients with stroke and healthy adults. Methods: Six stroke patients with the premotor cortex involved (PMC+), seven patients with PMC spared (PMC-), and eight age- and sex-matched healthy adults participated in this study. The subjects were required to respond as quickly as possible with a rapid forward step when the go signal appeared on the screen under two conditions with different predictability level (simple reaction time (SRT) and choice reaction time (CRT)). The accuracy rate of the behavioral responses and reaction time (RT) were assessed to indicate the selection ability. The distribution of combined behavioral-EMG response patterns, the tibialis anterior muscle onset latency (TAOL) and postural-movement latency (TA-Movement latency, TA-Mov) of the stepping leg were analyzed to indicate preparation ability. Results and Discussion: No significant group main effect was found for the accuracy rate of the behavioral responses, but the RT of the PMC+ group was marginally longer than the healthy group (p = .059, effect size = .94). This result may indicate that the PMC+ group required longer time for selecting the appropriate stepping response. For movement-related postural preparation, the PMC+ and PMC- groups displayed significantly more TA delayed trials than the healthy adult group in the CRT condition (p = .007). The TAOL of the stance leg of the PMC+ group was significantly longer than that of the healthy controls while stepping with the unaffected leg (p = .040) and affected leg (p = .024). The TA-Mov showed no significant difference between groups regardless of the stepping legs. These results may suggest that the PMC lesion not only influenced the postural preparation of the affected stepping leg, but also that of the unaffected stance leg through a subcortical pathway. A hypothetical model is proposed to describe the involvement of the PMC in postural preparation and movement selection. Conclusions: This study provided evidence that lesion of the PMC affects the postural preparedness and selection of lower extremity voluntary movement. These findings can be used by clinicians to design effective interventions for improving postural preparedness and selection of voluntary movement for PMC involved patients.
Subjects
Stroke
Premotor cortex
Proactive postural control
Reaction time
Selection
Stepping
SDGs

[SDGs]SDG3

File(s)
Loading...
Thumbnail Image
Name

ntu-97-R93428010-1.pdf

Size

23.32 KB

Format

Adobe PDF

Checksum

(MD5):cc48f3d5fc3f3194039ad4071f46bb00

臺大位居世界頂尖大學之列,為永久珍藏及向國際展現本校豐碩的研究成果及學術能量,圖書館整合機構典藏(NTUR)與學術庫(AH)不同功能平台,成為臺大學術典藏NTU scholars。期能整合研究能量、促進交流合作、保存學術產出、推廣研究成果。

To permanently archive and promote researcher profiles and scholarly works, Library integrates the services of “NTU Repository” with “Academic Hub” to form NTU Scholars.

總館學科館員 (Main Library)
醫學圖書館學科館員 (Medical Library)
社會科學院辜振甫紀念圖書館學科館員 (Social Sciences Library)

開放取用是從使用者角度提升資訊取用性的社會運動,應用在學術研究上是透過將研究著作公開供使用者自由取閱,以促進學術傳播及因應期刊訂購費用逐年攀升。同時可加速研究發展、提升研究影響力,NTU Scholars即為本校的開放取用典藏(OA Archive)平台。(點選深入了解OA)

  • 請確認所上傳的全文是原創的內容,若該文件包含部分內容的版權非匯入者所有,或由第三方贊助與合作完成,請確認該版權所有者及第三方同意提供此授權。
    Please represent that the submission is your original work, and that you have the right to grant the rights to upload.
  • 若欲上傳已出版的全文電子檔,可使用Open policy finder網站查詢,以確認出版單位之版權政策。
    Please use Open policy finder to find a summary of permissions that are normally given as part of each publisher's copyright transfer agreement.
  • 網站簡介 (Quickstart Guide)
  • 使用手冊 (Instruction Manual)
  • 線上預約服務 (Booking Service)
  • 方案一:臺灣大學計算機中心帳號登入
    (With C&INC Email Account)
  • 方案二:ORCID帳號登入 (With ORCID)
  • 方案一:定期更新ORCID者,以ID匯入 (Search for identifier (ORCID))
  • 方案二:自行建檔 (Default mode Submission)
  • 方案三:學科館員協助匯入 (Email worklist to subject librarians)

Built with DSpace-CRIS software - Extension maintained and optimized by 4Science