Evidence map›Paper›PMID 12171472›Full record

ReviewJournal of anatomy2002

Evolution of the structure and function of the vertebrate tongue.

Shin-ichi Iwasaki

Open access · greenAbstract readReview
In one paragraph

Review in Journal of anatomy, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 61 papers.

0numbers the graph read from it
0cells of the map it votes in
61citing papers in PubMed
2.7field-weighted citation impact, top 12% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

61 citing papers in PubMed, 320 citations in OpenAlex.

  1. Article
  2. Article
  3. Into the belly of the brainstem: The neurons of the "extended" enteric nervous system.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  4. Functions of secretory calcium-binding phosphoproteins in dental mineralization.Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research · 2025
    Review
  5. Article
  6. Article
  7. Article
  8. Cerebellar control of targeted tongue movements.The Journal of physiology · 2025
    Article
  9. Review
  10. Ecomorphological and Age-Related Adaptations in the Tongues ofAnimals : an open access journal from MDPI · 2024
    Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Review
  17. The feeding apparatus of ants: an overview of structure and function.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2023
    Review
  18. Tongue of the Egyptian Endemic Bridled Skink (Animals : an open access journal from MDPI · 2023
    Article
  19. Review
  20. Article

1 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

1 author at 1 institution in 1 country.

Shin-ichi IwasakiAdvanced Research Center, The Nippon Dental University School of Dentistry at Niigata, Japan. iwasaki@ngt.ndu.ac.jp
Nippon Dental University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Studies of the comparative morphology of the tongues of living vertebrates have revealed how variations in the morphology and function of the organ might be related to evolutional events. The tongue, which plays a very important role in food intake by vertebrates, exhibits significant morphological variations that appear to represent adaptation to the current environmental conditions of each respective habitat. This review examines the fundamental importance of morphology in the evolution of the vertebrate tongue, focusing on the origin of the tongue and on the relationship between morphology and environmental conditions. Tongues of various extant vertebrates, including those of amphibians, reptiles, birds and mammals, were analysed in terms of gross anatomy and microanatomy by light microscopy and by scanning and transmission electron microscopy. Comparisons of tongue morphology revealed a relationship between changes in the appearance of the tongue and changes in habitat, from a freshwater environment to a terrestrial environment, as well as a relationship between the extent of keratinization of the lingual epithelium and the transition from a moist or wet environment to a dry environment. The lingual epithelium of amphibians is devoid of keratinization while that of reptilians is keratinized to different extents. Reptiles live in a variety of habitats, from seawater to regions of high temperature and very high or very low humidity. Keratinization of the lingual epithelium is considered to have been acquired concomitantly with the evolution of amniotes. The variations in the extent of keratinization of the lingual epithelium, which is observed between various amniotes, appear to be secondary, reflecting the environmental conditions of different species.

Indexed as

Biological EvolutionAnatomy, ComparativeAnimalsEpitheliumHumansMicroscopyMicroscopy, ElectronMicroscopy, Electron, ScanningTongueVertebrates

Identifiers

PMID12171472
PMCPMC1570891
OpenAlexW1985502171

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.