Brain Vesicles: Normal Appearance at Eight Weeks of Gestation

Dr Vladimir Lemaire, Dr Violetta Lozovyy
High Risk Pregnancy Doctors, Frisco, Texas, United States of America

The following images demonstrate the normal appearance of the brain vesicles at 8 weeks of gestation.

The cephalic end of the neural tube initially contains three vesicles: the prosencephalon (forebrain), the mesencephalon (midbrain), and the telencephalon (hindbrain). The prosencephalon later differentiates into the telencephalon and diencephalon, the rhombencephalon divides into the metencephalon and myelencephalon, while the mesencephalon remains unchanged.

2D ultrasound showing early development of the brain.
Image 1 2D ultrasound showing early development of the brain. © 2021 Vladimir Lemaire
Three-dimensional ultrasound in multiplanar display of an embryo at 8weeks of gestation showing the brain vesicles.
Image 2 Three-dimensional ultrasound in multiplanar display of an embryo at 8weeks of gestation showing the brain vesicles. © 2021 Vladimir Lemaire
A rendered image of the same embryo in Silhouette mode.
Image 3 A rendered image of the same embryo in Silhouette mode. © 2021 Vladimir Lemaire
Image obtained by augmenting the transparency effect and adjusting light effects.
Image 4 Image obtained by augmenting the transparency effect and adjusting light effects. © 2021 Vladimir Lemaire

References:

Pooh RK. "Recent advances in 3D ultrasound, silhouette ultrasound, and sonoangiogram in fetal neurology." Donald School J Ultrasound Obstet Gynecol 2016;10(2):193-200.

Abuhamad A, et al. "The fetal central nervous system." First trimester ultrasound diagnosis of fetal abnormalities. Philadelphia: Wolters Kluwer; 2018. pgs 113-115.

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