Hack M, Mostow A, Miranda S B
Pediatrics. 1976 Nov;58(5):669-74.
The quality of the awake state and attention in preterm infants has been evaluated by rating indices of attention such as widening of the eye, type of fixation, brightening, scanning, and cessation of sucking measured during visual fixation of patterns. Twenty-six infants ranging from 28 to 32 weeks' gestation at birth (mean, 31 weeks) were tested from one to four weeks postnatally until 36 weeks' gestation. Indices of attention were rated on a scale of 4 with an optimal mean index of 4. A progressive increase in behaviors associated with fixation of visual stimuli has been shown from 32 to 36 weeks of conceptual age. Mean scores ranged from 0.7 at 31 weeks' gestation to 1.8 at 34 weeks' and 2.7 at 36 weeks' gestation. The possibility therefore exists that by as early as 31 to 32 weeks from conception the human brain may be capable of waking states and thus able to process some sensory stimulation.rease in behaviors associated with fixation of visual stimuli has been shown from 32 to 36 weeks of conceptual age. Mean scores ranged from 0.7 at 31 weeks' gestation to 1.8 at 34 weeks' and 2.7 at 36 weeks' gestation. The possibility therefore exists that by as early as 31 to 32 weeks from conception the human brain may be capable of waking states and thus able to process some sensory stimulation.
通过对注意力评级指标进行评估，如在注视图案时测量到的眼睛睁大、注视类型、亮度增强、扫视和吸吮停止等，来评价早产儿清醒状态和注意力的质量。对26名出生时孕周在28至32周（平均31周）的婴儿进行测试，从出生后1至4周一直到孕36周。注意力指标按4分制进行评分，最佳平均指标为4分。从概念年龄32周到36周，与视觉刺激注视相关的行为呈逐渐增加趋势。平均得分从孕31周时的0.7分，到孕34周时的1.8分，再到孕36周时的2.7分。因此，有可能早在受孕后31至32周，人类大脑就能够进入清醒状态，从而能够处理一些感觉刺激。从概念年龄32周到36周，与视觉刺激注视相关的行为呈逐渐增加趋势。平均得分从孕31周时的0.7分，到孕34周时的1.8分，再到孕36周时的2.7分。因此，有可能早在受孕后31至32周，人类大脑就能够进入清醒状态，从而能够处理一些感觉刺激。
