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- Title
Fetal movements: the origin of human behaviour.
- Authors
Einspieler, Christa; Prayer, Daniela; Marschik, Peter B
- Abstract
During the first 20 weeks of pregnancy especially, fetuses occasionally raise their hands and place them behind the head; sometimes they even cross their legs and lie as though "relaxing in a hammock".8 Fetal Motility Clusters in Rest and Activity Cycles By 20 weeks' gestation, fetal activity shows a diurnal variation with peaks in the late evening. Interestingly, both general and breathing movements are unrelated within pairs of twins, which suggests that the motor development of twins is largely independent of their co-twins' development.23 An adequate intrathoracic space and amount of amniotic fluid as well as normal fetal breathing movements are required for lung development. 2b), can already be observed during pregnancy.19 GLO:1VN/01oct21:dmcn14918-fig-0002.jpg PHOTO (COLOR): 2 Fetal limb movement patterns recorded by means of dynamic magnetic resonance imaging: (a) grasping the umbilical cord (27wks' gestation); (b) extended index finger (27wks' gestation); (c) alternating leg movements (19wks' gestation).8 gl Isolated leg movements are less frequent than isolated arm movements but emerge at the same time (10-11wks' gestation), which indicates that motor system development does not progress in a craniocaudal sequence. Isolated finger movements emerge at around 13 weeks' gestation; cloni and twitches appear after 14 weeks, but are rare even then.8,12 During the third trimester, the fetus manipulates and even squeezes the umbilical cord (Fig.
- Subjects
HUMAN mechanics; FETAL movement; FETAL distress; MOVEMENT disorders; HUMAN origins; MAGNETIC resonance imaging; EMBRYONIC physiology
- Publication
Developmental Medicine & Child Neurology, 2021, Vol 63, Issue 10, p1142
- ISSN
0012-1622
- Publication type
Article
- DOI
10.1111/dmcn.14918