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cephalic flexure, cervical flexure, diencephalon, hypothalamus, isthmus, lamina terminalis, mamillary area, mesencephalon, metencephalon: pons area and rhombic lip (cerebellum), myelencephalon (medulla oblongata), neurohypophyseal bud, optic stalk and chiasma area, pineal bud area, pontine flexure, preoptic area, primitive filum terminale, primordial olfactory bulb, primordial piriform cortex, roof of rhombencoel (fourth ventricle), spinal cord, telencephalon (cerebral vesicle)

Central nervous system of the 18-mm embryo. Arrows indicate the position of the cephalic, pontine and cervical flexures.


Keywords: cephalic flexure, cervical flexure, diencephalon, hypothalamus, isthmus, lamina terminalis, mamillary area, mesencephalon, metencephalon: pons area and rhombic lip (cerebellum), myelencephalon (medulla oblongata), neurohypophyseal bud, optic stalk and chiasma area, pineal bud area, pontine flexure, preoptic area, primitive filum terminale, primordial olfactory bulb, primordial piriform cortex, roof of rhombencoel (fourth ventricle), spinal cord, telencephalon (cerebral vesicle)

Source: Atlas of Human Embryos.