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Journal of Ultrasound in Medicine, Vol 6, Issue 10 573-576, Copyright © 1987 by American Institute of Ultrasound in Medicine

JOURNAL ARTICLE

Relative growth of the higher fetal brain structures

D. E. Siedler and R. A. Filly
Department of Radiology, University of California School of Medicine, San Francisco.

In a retrospective review of 90 normal obstetric ultrasonographic examinations obtained between 15 and 35 menstrual weeks, measurements were made of the transverse dimensions of the thalamus, basal ganglia/insula, atrium of the lateral ventricle, and temporal operculum in the standard biparietal diameter plane. At 15 menstrual weeks the echogenic choroid plexus, filling the lateral ventricle, dominates the appearance of the cranium. During later gestation, the cerebral hemispheres and basal ganglia (telencephalic structures) show marked growth, while the diencephalon and lateral ventricles increase much less rapidly in size. This observation is made using a method of measurement that least favors the demonstration of cerebral cortical growth. Of note is that the width of the lateral ventricle remains relatively stable throughout the second and third trimesters.


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B. Almog, R. Gamzu, R. Achiron, O. Fainaru, and Y. Zalel
Fetal Lateral Ventricular Width: What Should Be Its Upper Limit? A Prospective Cohort Study and Reanalysis of the Current and Previous Data
J. Ultrasound Med., January 1, 2003; 22(1): 39 - 43.
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Copyright © 1987 by the American Institute of Ultrasound in Medicine.