Segmental pattern and nuclei in the human embryonic brain at stage 13
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Updated: Oct 19, 2026

2D and 3D Human Induced Pluripotent Stem Cell-Based Models to Dissect Primary Cilium Involvement during Neocortical Development
Published on: March 25, 2022
M Bruska1, M Markowski, J Szyszka-Mróz
1Department of Anatomy, University School of Medical Sciences, Poznań.
Abstract:
Studies of serial sections and reconstructions of embryos at stage 13 (32) postovulatory days) revealed that the cranial neural tube in the investigated embryos possesses 15 neuromers: 1 telencephalic, 3 diencephalic, 3 mesencephalic, and 8 rhombencephalic. Within the primary efferent column all nuclei of the cranial nerves may be distinguished. Also fibers entering brain from cranial nerve ganglia form the common afferent tract. The relation of neuromers to the motor nuclei of the cranial nerves is following: M1-oculomotor, M2-trochlear, Rh2-trigeminal, Rh4-facial, Rh6-glossopharyngeal, Rh7-vagal, Rh8-hypoglossal.
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