| Week 6 Embryo - Stage 16 Movies
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<html5media height="620" width="600">File:Stage 16 MRI 3D01.mp4</html5media>
Click Here to play on mobile device
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These Week 6 movies shows the appearance of human embryo at Carnegie stage 16 (GA week 8).
Embryo Surface - Carnegie Stage 16
This movie shows an unlabeled MRI 3D volume embryo scan of the Kyoto embryo (stage 16, week 6). Compare this with the earlier stage 13 week 4 embryo.
Note:
- Growth of limb buds
- Size of the head
- Pharyngeal arches
- Size and position of the heart
- Umbilicus containing cord with placental blood vessels
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| <html5media height="620" width="600">File:Stage 16 MRI 3D03.mp4</html5media>
Click Here to play on mobile device
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Neural Development
This labelled version shows the Stage 16 embryo rotating with the CNS spinal cord and the secondary brain vesicles and flexures labeled.
Note:
- Growth of limb buds.
- Development of the vision and hearing sensory vesicles (optic and otic) and their relative positions (optic at the diencephalon; otic at the metencephalon).
- The lamina terminalis at the end of the neural tube (site of cranial/anterior neuropore closure).
- The 5 secondary brain vesicles.
- The large ventricular space within the tube, divided into future regions.
- The lateral walls of the neural tube forming alar and basal plates (particularly obvious along spinal cord).
- The top and bottom of the neural tube forming thin roof and floor plates (particularly obvious along spinal cord).
- The large dorsal root ganglia along the length of the spinal cord.
- The 3 brain flexures; cephalic (or mesencephalic), pontine and cervical.
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| <html5media height="700" width="600">File:Stage16 MRI S01.mp4</html5media>
Click Here to play on mobile device
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Sagittal Sections
This movie shows an unlabeled MRI sagittal scan passing from right to left through the Kyoto embryo (stage 16, week 6). Compare this with the earlier week 4 stage 13 embryo CNS.
Note:
- Growth of limb buds.
- Development of the vision and hearing sensory vesicles (optic and otic) and their relative positions (optic at the diencephalon; otic at the metencephalon).
- The lamina terminalis at the end of the neural tube (site of cranial/anterior neuropore closure).
- The 5 secondary brain vesicles.
- The large ventricular space within the tube, divided into future regions.
- The lateral walls of the neural tube forming alar and basal plates (particularly obvious along spinal cord).
- The top and bottom of the neural tube forming thin roof and floor plates (particularly obvious along spinal cord).
- The large dorsal root ganglia along the length of the spinal cord.
- The 3 brain flexures; cephalic (or mesencephalic), pontine and cervical.
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BGDA Week 4 Movies | BGDA Week 6 Movies | BGDA Week 8 Movies
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