Robert Wiedersheim

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The young Robert Ernst Eduard Wiedersheim, probably in early 1874 by Alfredo Noack in Genoa.[1]

Robert Ernst Eduard Wiedersheim (April 21, 1848 in Nürtingen – July 12, 1923 in Schachen (Lindau)) was a German anatomist who is famous for publishing a list of 86 “vestigial organs” in his book 'The Structure of Man: An Index to His Past History'.[2]

Biography[edit]

Already during his school years Wiedersheim showed an interest in botany and zoology. However, he was not a good student and barely passed the final examination. His initial academic advancement was slow, until in 1876 he became an anatomist at the Albert Ludwigs University of Freiburg where he taught until 1918.[3] He became an expert in comparative anatomy and published a number of relevant textbooks. He also collected early photographies and documents of scientists of his days.

In 1893 he published a list of vestigial organs. He writes, "comparative morphology points not only to the essentially similar plan of organization of the bodies of all vertebrates, ... but also to the occurrence in them of certain organs, or parts of organs, now known as 'vestigial.' “By such organs are meant those which were formerly of greater physiological significance than at present.”

He picked up on Darwin’s concept of “rudimentary” organs such as listed in the "The Descent of Man": the muscles of the ear, wisdom teeth, the appendix, the coccyx (tail bone), body hair, and the semilunar fold in the corner of the eye. The list, however, contains structures which today are known to be essential, and thus represents a historical record of the physiologic understanding of the day.

Evolutionists have used the credited examples of this list as an argument for evolution as they are evolutionary leftovers, of little use to the current organism. Creationists, on the other hand, have used the discredited examples as an argument against evolution. There is no "scientific" proof, they say, of the uselessness of a particular organ.

It is important to note that a vestige is not necessarily a completely useless organ. Although defined as "useless" in popular media, a vestige as defined in evolutionary biology may still have some use, but the use has since diminished. This definition is consistent with Wiedersheim, who said that vestigial organs are "wholly or in part functionless" (Wiedersheim 1893, p. 200) and have "lost their original physiological significance" (p. 205).

Although Wiedersheim originally published a list of 86, later interpretations enlarged his list to 180 vestiges. The zoologist Horatio Newman said in a written statement read into evidence in the Scopes Trial that "There are, according to Wiedersheim, no less than 180 vestigial structures in the human body, sufficient to make of a man a veritable walking museum of antiquities."[4]

Structures included in Wiedersheim’s list of 86 vestigial organs[edit]

  1. Os coccygis. Cauda humana.
  2. Superfluous embryonic notochord and associated somites.
  3. Embryonic cervical, lumbar, and sacral ribs.
  4. The thirteenth rib of the adult.
  5. The seventh cervical rib in the adult.
  6. The interarticular cartilage of the sterno-clavicular joint (probable vestige of the episternal apparatus).
  7. Ossa supra-sternalia.
  8. Certain centres of ossification in the manubrium sterni.
  9. The branchial clefts (for the most part) and branchial ridges.
  10. Processus styloideus ossis temporis, and the ligamentum stylohyoideum.
  11. Anterior cornua of the hyoid, for the greater part.
  12. Foramen caecum of the tongue.
  13. Processus gracilis of the malleus.
  14. Post-frontal bone (?)
  15. Ossa interparietalia (and ? prseinterparietalia).
  16. Processus paramastoideus of exoccipital.
  17. Torus occipitalis.
  18. Processus frontalis of the temporal.
  19. Processus coracoideus [meta- and epi-coracoid bones].
  20. Os centrale carpi.
  21. Processus supracondyloideus humeri.
  22. Trochanter tertius femoris.
  23. The phalanges of the fifth toe, and less conspicuously of the third and fourth toes.
  24. Muscles of the pinna and the Musculus occipitalis. L
  25. M. transversus nuchae. L. -- [1]
  26. Facial muscles transformed into tendinous expansions.
  27. Mm. plantaris and palmaris longus, when completely tendinous.
  28. M. ischio femoralis.
  29. The caudal muscles.
  30. M. epitrochleo-anconseus.
  31. M. latissimo-condyloideus.
  32. M. transversus thoracis (triangularis sterni).
  33. M. palmaris brevis.
  34. The transition bundles between the trapezius and the sterno- cleido-mastoideus.
  35. M. levator claviculae.
  36. M. rectus thoracis.
  37. M. ere master.
  38. The primitive hairy covering or lanugo.
  39. Vestiges of vibrissae
  40. The vertex coccygeus, the foveola and glabella coccygea.
  41. Certain vortices of hair on the breast.
  42. Nipples in men.
  43. Supernumerary mammary glands in women. [2]
  44. Alleged vestiges of mammary pouches [?]
  45. Supernumerary olfactory ridges.
  46. Jacobson's organ, and ductus naso-palatinus.
  47. Papilla palatina and foliata.
  48. Plica semilunaris of the eye.
  49. Vasa hyaloidse (Cloquet's canal) of the embryo the choroidal fissure.
  50. Lachrymal glands, in part.
  51. The epicanthus.
  52. M. orbitalis.
  53. Certain varieties of the pinna of the ear, i.e. Darwin's tubercle.
  54. The filum terminale of the spinal cord.
  55. Glandula pinealis and parietal organ.
  56. The parieto-occipital fissure of the brain [doubtful].
  57. The obex, ponticulus, ligula, taeniae medullares, and velum medullare anterius and posterius, of the brain.
  58. The hypophysis cerebri (pituitary body).
  59. The dorsal roots and ganglia of the hypoglossus nerve.
  60. The rami recurrentes of certain cranial nerves.
  61. Certain elements of the brachial and lumbo-sacral plexuses.
  62. The coccygeal nerve.
  63. The glandula coccygea.
  64. Palatal ridges.
  65. The sublingua.
  66. The formation of rudimentary dental papillae before the sinking of the dental ridge.
  67. The Wisdom teeth
  68. The occurrence of a third premolar (reversionary).
  69. The occurrence of a fourth molar (reversionary).
  70. The vestiges of a third dentition.
  71. The ciliated epithelium of the embryonic oesophagus.
  72. Bursa sub- and prehyoidea (ductus thyroglossus).
  73. Musculi broncho-oesophagei.
  74. The appendix vermiformis.
  75. Ventricle of the larynx (Morgagni's pouch).
  76. Lobus subpericardiacus of the lung (reversionary).
  77. Certain Valves of the veins.
  78. Certain structures of a vestigial nature in the heart.
  79. Arteria sacralis media.
  80. Arteria ischiadica.
  81. Superficial plantar arterial arch of the foot.
  82. The vena cava superior sinistra.
  83. Venae cardinales posteriores, and ductus Cuvieri.
  84. Vestiges (in the female) of the mesonephric system, and (in the male) of the Müllerian ducts.
  85. Conus inguinalis, and ligamentum inguinale.
  86. The area scroti.

See also[edit]

References[edit]

  1. ^ Frühe Zeugnisse vom Eichbergschacht (Kat.-Nr.7621/7) bei Undingen (Schwäbische Alb)und Würdigung des biospeläologischen Wirkens von Robert Ernst Wiedersheim. Beiträge zur Höhlen- und Karstkunde in Südwestdeutschland Nr. 46 S. 5-18 Stuttgart, Juni 2008. S. 12
  2. ^ Wiedersheim, R. (1893) The Structure of Man: An Index to His Past History. Second Edition. Translated by H. and M. Bernard. London: Macmillan and Co. 1895. http://openlibrary.org/books/OL7171834M/structure_of_man_an_index_to_his_past_history
  3. ^ Goerttler K. Wegbereiter unserer Naturwissenschaftlich-Medizinischen Moderne: 219 Biographien zur Portrait-Sammlung des Anatomen Robert Wiedersheim (1848-1923)Academia-Press, Germany, 2003. ISBN 3-00-011942-6 / 3000119426 http://appserv5.ph-heidelberg.de/onlinelex/index.php?id=1172
  4. ^ Darrow, Clarence and William J. Bryan. (1997). The World’s Most Famous Court Trial: The Tennessee Evolution Case Pub. The Lawbook Exchange, Ltd. p. 268