fa حرکت ارادی پتانسیل های ناشی از قشر حسی پیکری را تعدیل می کند اعصاب و روان Neurology Psychiatrics پژوهشي Research <p style="DIRECTION: rtl">  یک جزء اولیه پتانسیل ناشی از حس پیکری که از قشر اولیه حسی در انسان منشاء می گیرد، در طول حرکت ارادی <strong><i> </i></strong>مدین در مچ دست تحریک می شد در حالی که شخص مورد آزمایش با همان <strong><i>(Median) </i></strong>انگشت تخفیف می یابد. عصب<strong><i> </i></strong>دست حرکات تفکیک شده انگشت را انجام می داد. تضعیف شده بود. آنالیز <strong><i>P25 </i></strong>اجزاء تحت قشری پتانسیل ناشی از حس پیکری تغییری نکردند ولی جزء قشری دو قطبی هم ارز نشان می دهد که این جزء از نواحی 1 و 2 قشر حسی سرچشمه می گیرد. بنظر می رسد که قشر حرکتی( ناحیه 4) یک مسیر مهاری به سمت نواحی 1 و 2 دارد، که در طول حرکات ارادی فعال است. </p><p> <strong><i> </i></strong></p><p>  </p> <div style="mso-element: frame mso-element-frame-width: 346.55pt mso-element-frame-height: 233.5pt mso-element-wrap: auto mso-element-anchor-horizontal: margin mso-element-left: .05pt mso-element-top: 26.95pt"><tbody><tr><td style="BORDER-BOTTOM: #f0f0f0 BORDER-LEFT: #f0f0f0 PADDING-BOTTOM: 0in BACKGROUND-COLOR: transparent PADDING-LEFT: 0in PADDING-RIGHT: 0in BORDER-TOP: #f0f0f0 BORDER-RIGHT: #f0f0f0 PADDING-TOP: 0in" height="311" valign="top" align="left"><p style="TEXT-JUSTIFY: inter-ideograph TEXT-ALIGN: justify LINE-HEIGHT: 19.9pt MARGIN: 0in 0in 0pt 1.2pt mso-element: frame mso-element-frame-width: 346.55pt mso-element-frame-height: 233.5pt mso-element-wrap: auto mso-element-anchor-horizontal: margin mso-element-left: .05pt mso-element-top: 26.95pt mso-line-height-rule: exactly" class="Style"><i><font size="3"><font face="Times New Roman">An early component of the somatosensory evoked potential, arising from the primary sensory cortex in man is attenuated during voluntary finger movement. The median nerve at the wrist was stimulated while the subject performed fractionated finger movements with the same hand. <p></p></font></font></i></p><p style="TEXT-JUSTIFY: inter-ideograph TEXT-ALIGN: justify LINE-HEIGHT: 19.9pt TEXT-INDENT: 15.1pt MARGIN: 0.2pt 2.4pt 0pt 0.95pt mso-element: frame mso-element-frame-width: 346.55pt mso-element-frame-height: 233.5pt mso-element-wrap: auto mso-element-anchor-horizontal: margin mso-element-left: .05pt mso-element-top: 26.95pt mso-line-height-rule: exactly" class="Style"><i><font size="3" face="Times New Roman">Subcortical components of the somatosensory evoked potential were not changed but the P25 cortical component was attenuated. Equivalent diapole analysis shows this component originates in areas 1 and </font></i><span style="FONT-FAMILY: "Arial","sans-serif" FONT-SIZE: 11pt">2 </span><i><font size="3"><font face="Times New Roman">of the sensory cortex. <p></p></font></font></i></p></td></tr></tbody></table></div><p align="left"><i><span style="LINE-HEIGHT: 115% FONT-FAMILY: "Calibri","sans-serif" FONT-SIZE: 11pt mso-ascii-theme-font: minor-latin mso-fareast-font-family: 'Times New Roman' mso-fareast-theme-font: minor-fareast mso-hansi-theme-font: minor-latin mso-bidi-font-family: Arial mso-bidi-theme-font: minor-bidi mso-bidi-language: AR-SA mso-ansi-language: EN-US mso-fareast-language: EN-US">It is proposed that the motor cortex (area </span></i><span style="LINE-HEIGHT: 115% FONT-FAMILY: "Calibri","sans-serif" FONT-SIZE: 11.5pt mso-ascii-theme-font: minor-latin mso-fareast-font-family: 'Times New Roman' mso-fareast-theme-font: minor-fareast mso-hansi-theme-font: minor-latin mso-bidi-font-family: Arial mso-bidi-theme-font: minor-bidi mso-bidi-language: AR-SA mso-ansi-language: EN-US mso-fareast-language: EN-US">4) </span><i><span style="LINE-HEIGHT: 115% FONT-FAMILY: "Calibri","sans-serif" FONT-SIZE: 11pt mso-ascii-theme-font: minor-latin mso-fareast-font-family: 'Times New Roman' mso-fareast-theme-font: minor-fareast mso-hansi-theme-font: minor-latin mso-bidi-font-family: Arial mso-bidi-theme-font: minor-bidi mso-bidi-language: AR-SA mso-ansi-language: EN-US mso-fareast-language: EN-US">has an inhibitory pathway to areas </span></i><span style="LINE-HEIGHT: 115% FONT-FAMILY: "Calibri","sans-serif" FONT-SIZE: 11pt mso-font-width: 114% mso-ascii-theme-font: minor-latin mso-fareast-font-family: 'Times New Roman' mso-fareast-theme-font: minor-fareast mso-hansi-theme-font: minor-latin mso-bidi-font-family: Arial mso-bidi-theme-font: minor-bidi mso-bidi-language: AR-SA mso-ansi-language: EN-US mso-fareast-language: EN-US">1 </span><i><span style="LINE-HEIGHT: 115% FONT-FAMILY: "Calibri","sans-serif" FONT-SIZE: 11pt mso-ascii-theme-font: minor-latin mso-fareast-font-family: 'Times New Roman' mso-fareast-theme-font: minor-fareast mso-hansi-theme-font: minor-latin mso-bidi-font-family: Arial mso-bidi-theme-font: minor-bidi mso-bidi-language: AR-SA mso-ansi-language: EN-US mso-fareast-language: EN-US">and </span></i><span style="LINE-HEIGHT: 115% FONT-FAMILY: "Calibri","sans-serif" FONT-SIZE: 11pt mso-font-width: 114% mso-ascii-theme-font: minor-latin mso-fareast-font-family: 'Times New Roman' mso-fareast-theme-font: minor-fareast mso-hansi-theme-font: minor-latin mso-bidi-font-family: Arial mso-bidi-theme-font: minor-bidi mso-bidi-language: AR-SA mso-ansi-language: EN-US mso-fareast-language: EN-US">2 </span><i><span style="LINE-HEIGHT: 115% FONT-FAMILY: "Calibri","sans-serif" FONT-SIZE: 11pt mso-ascii-theme-font: minor-latin mso-fareast-font-family: 'Times New Roman' mso-fareast-theme-font: minor-fareast mso-hansi-theme-font: minor-latin mso-bidi-font-family: Arial mso-bidi-theme-font: minor-bidi mso-bidi-language: AR-SA mso-ansi-language: EN-US mso-fareast-language: EN-US">which is active during voluntary movements.</span></i></p> 1- دریافت حسی 2- حرکت ارادی 3- قشرحسی مخ 4- Evoked Potential 1) Sensory Input 2) Voluntary Movement 3) Evoked potential 4) Sensory Cortex 191 191 http://rjms.iums.ac.ir/browse.php?a_code=A-10-1-1199&slc_lang=fa&sid=1 E.M. Sedgwick ای - ام سدویک، وی چی 3900319475328460021116 3900319475328460021116 Yes V. Weerasinghe ویراسینگه 3900319475328460021117 3900319475328460021117 No