کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6281529 | 1615115 | 2015 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Velocity-dependent suppression of the soleus H-reflex during robot-assisted passive stepping
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
MmaxAFORMSAfferent inputBGAH-reflex - H-رفلکسTibialis Anterior - Tibialis قدامیmotor threshold - آستانه موتورSpinal cord injury - آسیب نخاعیAnkle foot orthosis - ارتز پای مچ پاEMG - الکترومیوگرافیelectromyography - الکترومیوگرافیLocomotion - حرکتBiceps femoris - دوشادوش فمورسrectus femoris - رانی رکتوسHoffmann reflex - رفلکس هوفمنVelocity - سرعت برداریSol - سلSoleus - سولوسsci - علمیroot mean square - میانگین مربع ریشه
موضوعات مرتبط
علوم زیستی و بیوفناوری
علم عصب شناسی
علوم اعصاب (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The amplitude of the Hoffmann (H)-reflex in the soleus (Sol) muscle is known to be suppressed during passive stepping compared with during passive standing. The reduction of the H-reflex is not due to load-related afferent inputs, but rather to movement-related afferent inputs from the lower limbs. To elucidate the underlying neural mechanisms of this inhibition, we investigated the effects of the stepping velocity on the Sol H-reflex during robot-assisted passive stepping in 11 healthy subjects. The Sol H-reflexes were recorded during passive standing and stepping at five stepping velocities (stride frequencies: 14, 21, 28, 35, and 42Â minâ1) in the air. The Sol H-reflexes were significantly inhibited during passive stepping as compared with during passive standing, and reduced in size as the stepping velocity increased. These results indicate that the extent of H-reflex suppression increases with increasing movement-related afferent inputs from the lower limbs during passive stepping. The velocity dependence suggests that the Ia afferent inputs from lower-limb muscles around the hip and knee joints are most probably related to this inhibition.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuroscience Letters - Volume 584, 1 January 2015, Pages 337-341
Journal: Neuroscience Letters - Volume 584, 1 January 2015, Pages 337-341
نویسندگان
Yohei Masugi, Taku Kitamura, Kiyotaka Kamibayashi, Tetsuya Ogawa, Toru Ogata, Noritaka Kawashima, Kimitaka Nakazawa,