Mouse embryo, Theiler stage 22.
|Theiler Stage 22
- Fingers separate distally
- Individual 'fingers' are visible in the anterior footplate and there are deep indentations between the 'toes' which are not yet separated.
- The long bones of the limbs are present and there are hair follicles in the pectoral, pelvic and trunk regions.
- The pinna is turned forwards and the umbilical hernia is conspicuous.
- Absent: hair follicles in the cephalic region.
- Embryonic age = 14 dpc (range 13.5-15 dpc)
- 56-60 somite pairs
- Equivalent Witschi Stage in rat = 31
- Equivalent Carnegie Stage in humans = 20-23
- Links: Quicktime 2.2MB | Quicktime 4MB | Quicktime version | Flash version | Movies | Computed Tomography | Mouse Development
<pubmed>19545439</pubmed>| PMC2717911 | BMC Physiol.
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IKI stain - 1% iodine metal (I2) + 2% potassium iodide (KI) in water.