Day 24_Goldstein Lecture What is Development

R cooling difference we think was a consequence of the

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Unformatted text preview: ger to achieve than did Controls. r\ cooling difference, we think, was a consequence of the increased numbers of surfaces Control for walking and crawling. Many of the rats’ moveFlight ments from surface to surface involved rolling movements on the longitudinal Smotherman & Robinson, 1988a), but the degree to which). body axis (see Fig. 3 these subjects are able to process sThese flight-induced alterations in maternal movements changed the pattern timulation is unknown. During the perinatal period the rat undergoes substantial of prenatal vestibular input to fetuses in utero and were associated with striking physical growth and neural maturation. Corresponding imchanges n fetal preprovements in sensory-perceptual functioin can bevestibular morphology and perception (Ronca et al., 2000). Figure 9. Chronological appearance of maternal sources of pup available in microgravity stimulation across the perinatal period. sumed from neurobiological analyses; however, there exist virtually no empirical data with which to assess the development of sensory-perceptual Fetuses from NIH.R1sand NIH.R2 function in these subject (see Alberts, 1984). Thus, it is presently impossible to determine the impact on perinatal Several oinvestigators who analyzed fetal tissues from NIH.R1 and R2 disoffspring f stimuli present within the fetal and newborn habitats. covered differences between space flight- and Earth-gestated fetuses. Among the There is a similar lack of data with which to quantify noteworthy impinge on specific tactile, vestibular, and thermal cues that findings were: perinatal organisms. We have recently begun to make direct measurements of such stimuli in th(a)at (R1 fetuses showed a six-fold increase in atrial natriuretic peptide (ANP), e r Ronca & Alberts, 1991), and can offer some preliminary comments on the a cardiovascular-related hormone that regulates sodium and water nature of available stimulation. excretion, and Maternal activities during gestation, labor, a...
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