Titlebook: MRI of the Fetal Brain; Normal Development a Catherine Garel Book 2004 Springer-Verlag Berlin Heidelberg 2004 Brain: Growth and development

Indict

ungainly

Comments on the Resultsr 1/10-1/7 of the body weight during the last trimester of pregnancy, whereas it only represents 1/50 of an adult’s weight. The cerebellum, on the contrary, represents 1/25 of the brain’s weight in newborns vs 1/15-1/10 for adults [51].

Fortuitous

Abnormalities of the Posterior Cerebral Fossatube closure in Chiari II malformation (see Chap. 11), the congenital cystic abnormalities of the PF, and a heterogeneous group of exceptional abnormalities such as rhombencephalosynapsis, tumoral lesions and vascular malformations.

Virtues

Abnormalities of the Fetal Cerebral Parenchyma: Ischaemic and Haemorrhagic Lesionsck, hypoxia, abdominal trauma, hypo- or hypertension, drug use) or fetal (infection, anasarca) origin [., .]. Aside from these risk situations, one must also consider the monochorial multiple pregnancies, either when one of the fetuses dies in utero, or in the context of a twin-twin transfusion syndrome (TTTS) [.].

Monocle

易弯曲

AppendixIn the present chapter, we wish to provide the reader with a detailed description of the aspect of certain cerebral structures, which were not systematically studied on each one of the fetuses in this atlas, but which nonetheless are all particularly interesting in the study of the fetal brain.

遗传学

Intracranial Space-Occupying LesionsCongenital cerebral tumours are extremely rare; they are defined as the tumours observed in the antenatal period or in the first 2 months of life. They account for 0.5 %–1.5 % of cerebral tumours in children [.–.]. The occurrence rate is approximately 0.34 per million live births [., .].

不近人情

agonist

Techniquell worrying. Fetal sedation is not universally used. In our institution, we continue using a sedation by maternal oral administration of flunitrazepam (1 mg) 30 min before the beginning of the examination.

DEMUR

Ventricular DilatationThe term “ventriculomegaly” is very frequently used in the English-language literature, although it only refers to the widening of one or several ventricles, regardless of the skull dimensions, and the cause of this dilatation.