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Embryology in the Quran: Difference between revisions
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Myoblasts have aggregated into ventral and dorsal masses in the upper limb by day 36 and the start of chondrification.<ref>Sivakumar, B. et. al. ''Congenital Hand Differences'' in Farhadieh, R. et. al. (ed.) Plastic and Reconstructive Surgery: Approaches and Techniques, Chichester: Wiley, 2015, p.660 [https://books.google.co.uk/books?id=tCq9BgAAQBAJ&pg=PA660#v=onepage&q&f=false Google books preview]</ref> | Myoblasts have aggregated into ventral and dorsal masses in the upper limb by day 36 and the start of chondrification.<ref>Sivakumar, B. et. al. ''Congenital Hand Differences'' in Farhadieh, R. et. al. (ed.) Plastic and Reconstructive Surgery: Approaches and Techniques, Chichester: Wiley, 2015, p.660 [https://books.google.co.uk/books?id=tCq9BgAAQBAJ&pg=PA660#v=onepage&q&f=false Google books preview]</ref> | ||
A detailed account by Walker and Miranda, including useful diagrams, explains that after day 35, the premuscle regions of the limb containing myoblasts and fibroblasts become distinct and have started to fuse together to become myotubes (which form muscle fibres) | A detailed account by Walker and Miranda, including useful diagrams, explains that after day 35, the premuscle regions of the limb containing myoblasts and fibroblasts become distinct, and by day 45 have started to fuse together to become myotubes (which form muscle fibres). With axial musculo-skeletal development, myotomes have migrated (these form axial muscle) and sclerotomes have started to condense into mesenchyme (which will form cartilage) in the 5th week.<ref>Walker, U. A., and Miranda, A. F. ''Muscle Metabolism in the Fetus and Neonate'' in Cowett, R. M. (ed.) Principles of Perinatal-Neonatal Metabolism, 2nd Edition, Volume 1, New York: Springer, 1998, pp.642-643 [https://books.google.co.uk/books?id=eoy-BwAAQBAJ&pg=PA642#v=onepage&q&f=false Google Books preview]</ref> | ||
According to Rugh, Building blocks are present for 40 pairs of muscles, which are located from the base of the skull to the bottom of the spinal column by day 28<ref>Conception to Birth Roberts Rugh, Ph.D., Landrum B. Shettles, Ph.D., M.D. Harper & Row, (New York), 1971, p.35</ref> (these are the myotomes of the somites). Muscles appear in the pelvis day 31<ref>ibid. p.43</ref>. Movement of the muscles is being controlled by the nervous system by the 6th week <ref>ibid. p.34</ref>. All of the muscle blocks have appeared by day 36 after conception<ref>ibid. p.46</ref>. | According to Rugh, Building blocks are present for 40 pairs of muscles, which are located from the base of the skull to the bottom of the spinal column by day 28<ref>Conception to Birth Roberts Rugh, Ph.D., Landrum B. Shettles, Ph.D., M.D. Harper & Row, (New York), 1971, p.35</ref> (these are the myotomes of the somites). Muscles appear in the pelvis day 31<ref>ibid. p.43</ref>. Movement of the muscles is being controlled by the nervous system by the 6th week <ref>ibid. p.34</ref>. All of the muscle blocks have appeared by day 36 after conception<ref>ibid. p.46</ref>. | ||