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  • Title: Relationships between early postnatal cranial ultrasonography linear measures and neurobehaviour at term-equivalent age in infants born <30 weeks' gestational age.
    Author: Cuzzilla R, Olsen JE, Eeles AL, Rogerson SR, Anderson PJ, Cowan FM, Doyle LW, Cheong JLY, Spittle AJ.
    Journal: Early Hum Dev; 2022 Jan; 164():105520. PubMed ID: 34896733.
    Abstract:
    BACKGROUND: The relationship between early postnatal brain development and neurobehaviour at term-equivalent age (TEA) remains uncertain. AIM: We aimed to explore relationships between early postnatal cranial ultrasonography (cUS) linear measures of brain size and brain growth with neurobehaviour at TEA in infants born <30 weeks' gestational age (GA). STUDY DESIGN: Prospective observational cohort study. SUBJECTS: 137 infants born <30 weeks' GA without major brain injury on neonatal cUS. OUTCOME MEASURES: Neurobehaviour at TEA assessed using the General Movements Assessment (GMA) and Hammersmith Neonatal Neurological Examination (HNNE). RESULTS: The GMA was administered in 115/137 (84%) infants; 80 (70%) presented with abnormal general movements (GMs) (79 poor repertoire, 1 cramped synchronised). The HNNE was assessed in 106/137 (77%) infants; 52 (49%) had a suboptimal total score. With respect to brain size, larger measures of the corpus callosum length (CCL) and right anterior horn width (AHW) at 1-month were related to lower risk of abnormal GMs, and larger measures of the biparietal diameter at 1-week and 2-months were related to lower risk of a suboptimal HNNE. As for brain growth, increases of the CCL and transcerebellar diameter between birth and 1-month, and left and right AHWs between 1- and 2-months, were related to lower risk of abnormal GMs. CONCLUSION: Early postnatal brain size and brain growth were related to neurobehaviour at TEA in infants born <30 weeks' GA. This study provides preliminary evidence for the prognostic utility of early postnatal cUS linear measures as potential markers of neurodevelopment in later childhood.
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