Nihon Sanka Fujinka Gakkai zasshi
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Nippon Sanka Fujinka Gakkai Zasshi · Aug 1991
[Developmental sequence of fetal behavior and the functional development of the fetal central nervous system].
The development of central nervous system (CNS) is the latest among the various fetal organs and is on the way to mature even at birth. Because behavior is the phenotype of the CNS function, the behavioral pattern significantly changes with the developmental stage of CNS throughout the whole fetal period. The purpose of this study is to clarify the developmental sequence of fetal behavior and to discuss the functional development of the fetal CNS. ⋯ The other movements showed the respective patterns of the changes in the incidence. Secondly, animal experiments were performed to obtain the basic data on fetal behavior which could not be given by the ultrasonographic observation of human fetuses. Fetal goats were incubated under the physiological condition in artificial amniotic fluid by using extracorporeal membrane oxygenation (ECMO) system.(ABSTRACT TRUNCATED AT 250 WORDS)
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Nippon Sanka Fujinka Gakkai Zasshi · Aug 1991
[Ontogeny of behavioral patterns in relation to the concurrent development of central nervous system function, focusing on REM sleep, NREM sleep and waking states in the human fetus].
Behavior is considered a one to one match between the manifestation of a particular individual motor activity (movement) and its correlated brain function. Each motor activity can be seen to run on its own developmental course with advance in gestation, while various movements also develop in concurrence with one another during intrauterine life, gradually integrating into complex and accommodated movements. I emphasized the present study, under real-time ultrasound observation, for investigating whether or not three states: REM (rapid eye movement) sleep, NREM (non-rapid eye movement) sleep and the waking state actually exist in utero, and if so, when the development of these states begins. 1. ⋯ To evaluate whether the waking state is present, 10 fetuses at 36 weeks or more of gestation were examined for a concurrence between miosis/mydriasis and the REM/NREM periods. Using pupil diameter as a parameter, miosis and mydriasis were distinguished from each other, statistically, by means of "least median of squares regression". Accordingly, the NREM period was occupied only by miosis (41.0% of total observation period), while the REM period was divided into two conditions: 52.6% with miosis and 6.4% with mydriasis.(ABSTRACT TRUNCATED AT 400 WORDS)