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Limb Development - Anatomy & Physiology (view source)
Revision as of 19:21, 29 August 2008
, 19:21, 29 August 2008→Dorsal - Ventral Patterning
===Dorsal - Ventral Patterning===
===Dorsal - Ventral Patterning===
*Important for the proper development of both internal and external structures:
:Internal - muscle and bone
:External - hair, nails, footpads
*This requires control over the ectoderm and mesoderm.
*It is the ectoderm which controls dorsal - ventral patterning.
**It achieves this by coordination of it's own patterning with the underlying mesoderm i.e. dorsal ectoderm gives rise to dorsal mesoderm.
*Dorsal - ventral patterning controls the positioning of the AER as it exists at the boundary of the dorsal and ventral aspects.