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Form and size of the brain at stage 13

Various neural areas are indicated according to current interpretations. A section (at higher magnification) through the midbrain at the level marked A-B shows the appearance of the neural wall at this time.

Based on reconstructions by Osborne O. Heard.

Text and Drawing adapted from Fig 13-10 of O'Rahilly and Müller, 1987.

Keywords: accessory nerve (CN XI), dorsal thalamus, facial nerve (CN VII), glossopharyngeal nerve (CN IX), mamillary recess, olfactory area, optic evagination, tectum, tegmentum, telencephalon medium, trigeminal nerve (CN V), vagus nerve (CN X), ventral thalamus, vestibulocochlear nerve (CN VIII)

Source: The Virtual Human Embryo.