[The development of the filiform papillae in the human tongue].
Filiform papillae are described in a 4-month-old fetus, in premature children (22-36 weeks) and in children who died soon after birth. Under the scanning electron microscope papillae filiformes often displayed tubercles appearing either independently or arising near the base of the tongue from obliquely running ridges dividing afterwards into tubercles. Some SEM specimens showed further development of papillae from tubercles and cylindrical papillae into papillae quite similar to those found in a fully developed tongue. They were however significantly smaller. Filiform papillae are more varied in the stage of development than in the fully developed tongue, because developmental stages could be observed here. We could also see spheroid papillae with tiny processes on the top or large scales on the circumference besides the above mentioned formations. Even places with "hairs" resembling those of the hair-tongue were found. These atypical findings were most likely pathological changes resulting from hypoxia before death.
D005260:Female; D005333:Fetus; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D008855:Microscopy, Electron, Scanning; D011247:Pregnancy; D014059:Tongue / Q000033:anatomy & histology / Q000196:embryology*
Die Entwicklung der fadenförmigen Papillen der menschlichen Zunge