Hayes M J, Smith B A, Herrick S E, Roberts S M, Swanson E
Psychology Department, University of Maine, Orono 04469, USA.
Physiol Behav. 1997 Jan;61(1):101-6. doi: 10.1016/s0031-9384(96)00356-3.
Postmature infants calm less when presented with sucrose solutions than term infants. To further assess the influence of postmaturity on sucrose responsivity, several motoric responses were examined in healthy term neonates and chronically stressed postmature (> or = 288 days gestational age (GA) e.g., > 41 weeks) neonates with Clifford's Syndrome tested between 5-91 h of age. Following baseline observations, each subject was presented with 0.1 ml of a 14% sucrose solution for 10 s each min for 5 min, and observations were continued for 5 min following stimulation. During sucrose stimulation and poststimulation phases, postmature infants showed more tremors during quiet state than term infants. Across conditions, postmature infants exhibited increased finger sucking, rhythmic sucking, but less mouth opening and arm movements than healthy, term infants. Sequence analysis revealed that short-latency mouthing, repetitive movements of the upper and lower lips, followed sucrose infusion reliably in postmature infants, but not term infants. These results suggest that postmaturity is associated with: 1. Increased oral behaviors associated with arousal and self soothing; and 2. Increased sucrose reactivity, as indicated by contingent mouthing and increased tremors.
过熟儿在接触蔗糖溶液时比足月儿更难平静下来。为了进一步评估过熟对蔗糖反应性的影响，我们对健康足月儿和患有克利福德综合征的慢性应激过熟儿（胎龄≥288天，例如≥41周）在出生后5 - 91小时进行了测试，观察了他们的几种运动反应。在基线观察之后，给每个受试者每分钟呈现0.1毫升14%的蔗糖溶液，每次持续10秒，共持续5分钟，刺激后再继续观察5分钟。在蔗糖刺激和刺激后阶段，过熟儿在安静状态下比足月儿表现出更多的震颤。在各种情况下，过熟儿比健康足月儿表现出更多的手指吸吮、节律性吸吮，但张嘴和手臂运动较少。序列分析显示，过熟儿在输注蔗糖后，上唇和下唇的短潜伏期张口及重复运动能可靠地出现，而足月儿则不然。这些结果表明，过熟与以下情况有关：1. 与觉醒和自我安抚相关的口腔行为增加；2. 如依随性张口和震颤增加所表明的蔗糖反应性增加。
