脑磁图显示极早产儿静息时峰值振荡频率减慢。
Magnetoencephalography reveals slowing of resting peak oscillatory frequency in children born very preterm.
机构信息
Department of Diagnostic Imaging, The Hospital for Sick Children, Toronto M5G 1X8, Canada.
出版信息
Pediatr Res. 2011 Aug;70(2):171-5. doi: 10.1203/PDR.0b013e3182225a9e.
Abstract
Resting cortical activity is characterized by a distinct spectral peak in the alpha frequency range. Slowing of this oscillatory peak toward the upper theta-band has been associated with a variety of neurological and neuropsychiatric conditions and has been attributed to altered thalamocortical dynamics. Children born very preterm exhibit altered development of thalamocortical systems. To test the hypothesis that peak oscillatory frequency is slowed in children born very preterm, we recorded resting magnetoencephalography (MEG) from school age children born very preterm (≤ 32 wk gestation) without major intellectual or neurological impairment and age-matched full-term controls. Very preterm children exhibit a slowing of peak frequency toward the theta-band over bilateral frontal cortex, together with reduced alpha-band power over bilateral frontal and temporal cortex, suggesting that mildly dysrhythmic thalamocortical interactions may contribute to altered spontaneous cortical activity in children born very preterm.
摘要
静息皮质活动的特征是在α频带范围内有一个明显的频谱峰。这种振荡峰向较高的θ带的减慢与各种神经和神经精神疾病有关，并归因于丘脑皮质动力学的改变。极早产儿出生时表现出丘脑皮质系统发育异常。为了验证峰频率在极早产儿中减慢的假设，我们记录了来自极早产儿（≤32 周妊娠）的学龄儿童的静息脑磁图（MEG），这些儿童没有严重的智力或神经损伤，且与年龄匹配的足月对照组相匹配。极早产儿的双侧额皮质表现出向θ带的峰频率减慢，同时双侧额皮质和颞皮质的α带功率降低，这表明轻度节律紊乱的丘脑皮质相互作用可能导致极早产儿出生后自发皮质活动的改变。
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