File:Stage19- limb rotation.jpg

From Embryology

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Human Embryo Limb Rotation

Arrows have been superimposed upon this Carnegie stage 19 embryo to show the direction in which the upper and lower limbs rotate during development.

Limb Upper Lower
Rotates dorsally (laterally) ventrally (medially)
Rostral thumb toe
Outward elbow faces outward knee faces outward
Extensor muscles   lateral and posterior of limb    anterior aspect of limb
  Links: image | limb | dermatomes | spinal nerve table

This distinctive embryonic rotation also establishes the future sensory pattern of dermatomes, segmentally patterned before this rotation.

Cite this page: Hill, M.A. (2024, June 20) Embryology Stage19- limb rotation.jpg. Retrieved from

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

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Yi efo/eka'e gwa ebo wo le nyangagi wuncin ye kamina wunga tinya nan

current15:35, 16 May 2010Thumbnail for version as of 15:35, 16 May 2010600 × 800 (27 KB)S8600021 (talk | contribs)Human Embryo (Carnegie stage 19) limb rotation Modified from: Stage19_bf1a.jpg Stage19_bf1a-1-limb-rotation.jpg Category:Carnegie Stage 19