Using near - infrared spectroscopy , which measures blood levels and oxygenation in the brain , fitzgerald and her team recorded activity in the brains of 18 premature babies born between 23 - 45 weeks from conception as nurses performed routine blood tests using a heel lance 當(dāng)護(hù)士按常規(guī)從早產(chǎn)兒腳跟處采集血樣,以便對(duì)他們進(jìn)行血液檢查時(shí),菲茨杰拉德和她的研究小組使用近紅外分光鏡對(duì)這些早產(chǎn)兒腦部的血液水平和氧合作用進(jìn)行了測(cè)量,記錄下了他們的腦部活動(dòng)。