What is DigiGait
DigiGait步態(tài)分析系統(tǒng)是一個(gè)采用實(shí)時(shí)腹側(cè)攝像技術(shù)(該技術(shù)獲得了美國(guó)發(fā)明專(zhuān)利)的產(chǎn)品?捎糜谘芯可窠(jīng)系統(tǒng)損傷、肌肉相關(guān)損傷、骨關(guān)節(jié)疾病與外傷等模型動(dòng)物的運(yùn)動(dòng)機(jī)能。
系統(tǒng)中高速數(shù)字?jǐn)z像機(jī)(25kHz)會(huì)以底面向上的視角連續(xù)不斷拍攝行走/跑動(dòng)中的動(dòng)物,DigiGait™ 軟件會(huì)生成“數(shù)字爪印”和動(dòng)態(tài)的步態(tài)信號(hào)(分辨率超過(guò)5000像素/cm2),形成爪部相對(duì)跑帶位置的實(shí)時(shí)記錄。最終可輸出50多種步態(tài)指數(shù),生成的數(shù)據(jù)標(biāo)準(zhǔn)誤差低,準(zhǔn)確度和可重復(fù)性高。
功能優(yōu)秀,實(shí)驗(yàn)無(wú)憂
-
可研究動(dòng)物在自愿狀態(tài)下行走,及在跑帶上強(qiáng)制運(yùn)動(dòng)的步態(tài)。
-
可研究動(dòng)物在跳躍和奔跑狀態(tài)下的步態(tài)。
-
在已知且相同速度下,可捕捉大量步幅信息。排除實(shí)驗(yàn)動(dòng)物因速度差異導(dǎo)致的實(shí)驗(yàn)數(shù)據(jù)分析誤差。
-
通過(guò)拍攝實(shí)驗(yàn)動(dòng)物的整個(gè)腹部,可提供三維運(yùn)動(dòng)學(xué)指標(biāo),保障數(shù)據(jù)完整性。
- 可增加實(shí)驗(yàn)難度,促使動(dòng)物爬上或爬下斜坡,最大限度測(cè)量實(shí)驗(yàn)動(dòng)物的運(yùn)動(dòng)能力。
應(yīng)用案例01
美國(guó)Baylor大學(xué)醫(yī)學(xué)院主導(dǎo)發(fā)表的“RNA結(jié)合蛋白(Pum1)單倍體劑量不足導(dǎo)致脊髓小腦性共濟(jì)失調(diào)性神經(jīng)病變機(jī)制”文章中,通過(guò)
使用DigiGait步態(tài)分析系統(tǒng),得出研究實(shí)驗(yàn)結(jié)果:Pum1缺失小鼠步幅長(zhǎng)度更短,步型(身體晃動(dòng))更大。與曠場(chǎng)實(shí)驗(yàn)、轉(zhuǎn)棒儀實(shí)驗(yàn),一同論證了Pum1缺失,會(huì)導(dǎo)致動(dòng)物的運(yùn)動(dòng)協(xié)調(diào)性出現(xiàn)進(jìn)行性缺失。其數(shù)據(jù)如下圖所示:
At 12 weeks of age, Pum1−/− mice displayed a wider stance (J), decreased stride length (K), and increased stride frequency (L) compared to either WT or Pum1+/− littermates. Stance width and stride length were normalized to mouse width and body length, respectively. L = left, and R = Right. Twelve mice per genotype were analyzed.
應(yīng)用案例02斯坦福大學(xué)神經(jīng)科學(xué)院主導(dǎo)發(fā)表的“對(duì)于用人類(lèi)肌肉干細(xì)胞和其他肌肉原生細(xì)胞制成的生物結(jié)構(gòu)可以在肌肉容積缺失(Volumetric muscle loss,VML)模型動(dòng)物體內(nèi)產(chǎn)生功能性肌肉組織”報(bào)道中提示:以干細(xì)胞為基礎(chǔ)的診療手段,可作為治療急性和慢性VML的有效途徑。其中,
使用DigiGait步態(tài)分析系統(tǒng)證實(shí)使用肌肉干細(xì)胞制成的生物結(jié)構(gòu),可以顯著改善VML模型動(dòng)物的運(yùn)動(dòng)狀態(tài),具體步態(tài)分析數(shù)據(jù)見(jiàn)下圖:
Exercise improves innervation of de novo myofibres and improves forces in vivo. (a) Representative image of a mouse during a gait analysis(top) and the gait footprints collected during the analysis (bottom). Mice were positioned in a transparent treadmill and a camera was positioned underneath to record the gait. (b) Quantification of the gait ‘disability score’ resulting from the analysis of 47 parameters.
應(yīng)用案例03芝加哥大學(xué)神經(jīng)科學(xué)院主導(dǎo)的CACNA1A mRNA轉(zhuǎn)錄影響因子和二級(jí)蛋白a1ACT對(duì)于小腦早期編碼的影響機(jī)制研究中,
使用步態(tài)分析系統(tǒng)聯(lián)合轉(zhuǎn)棒儀和曠場(chǎng)實(shí)驗(yàn),論證了CACNA1A mRNA表達(dá)異常時(shí),實(shí)驗(yàn)動(dòng)物的運(yùn)動(dòng)機(jī)能和肢體協(xié)調(diào)能力顯著降低,具體結(jié)果詳見(jiàn)下圖:
(H) Reduced treadmill performance of KIKO mice is corrected by a1ACT expression and prevented by prenatal Dox treatment. Treadmill running speed and total travel distance are compared among mice with/without Dox (_1/+1M) treatment at 1 month old. Prenatal inhibition of a1ACT expression prevented the rescue of motor behavior of KIKO:PC-a1ACT mouse in treadmill (left), rotarod (middle), and open field (right).
總結(jié)
DigiGait步態(tài)分析系統(tǒng)不僅能保證實(shí)驗(yàn)數(shù)據(jù)的精確性、靈敏性、可重復(fù)性,同時(shí)可提供更寬的速度選擇范圍以及更豐富的實(shí)驗(yàn)解決方案,高效助力您的科學(xué)研究! 歡迎致電400 886 1127
以上就是關(guān)于DigiGait的初步介紹,下期將為大家詳細(xì)介紹
運(yùn)動(dòng)功能研究方向解決方案,干貨滿滿,不要錯(cuò)過(guò)哦~