Evidence map›Paper›PMID 31402457›Full record

ReviewJournal of anatomy2019

A reappraisal and revision of the numbering of the pharyngeal arches.

Anthony Graham, Subathra Poopalasundaram, Victoria Shone, Clemens Kiecker

Abstract readReview
In one paragraph

Review in Journal of anatomy, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed
–field-weighted citation impact
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

18 citing papers in PubMed.

  1. Review
  2. Assessing candidate DLX-regulated genes in the first pharyngeal arch of chick embryos.Developmental dynamics : an official publication of the American Association of Anatomists · 2025
    Article
  3. Review
  4. Article
  5. Human Cardiac Development.Advances in experimental medicine and biology · 2024
    Article
  6. Review
  7. Article
  8. Article
  9. Review
  10. Article
  11. Article
  12. The conundrum of pharyngeal teeth origin: the role of germ layers, pouches, and gill slits.Biological reviews of the Cambridge Philosophical Society · 2022
    Review
  13. Morphogenesis of the Mammalian Aortic Arch Arteries.Frontiers in cell and developmental biology · 2022
    Article
  14. Review
  15. Article
  16. Journal of Anatomy January 2020.Journal of anatomy · 2020
    Article
  17. Review
  18. Article
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

4 authors.

Anthony GrahamDepartment for Developmental Neurobiology, King's College London, London, UK.ORCID 0000-0003-2011-7188
Subathra PoopalasundaramDepartment for Developmental Neurobiology, King's College London, London, UK.
Victoria ShoneDepartment for Developmental Neurobiology, King's College London, London, UK.
Clemens KieckerDepartment for Developmental Neurobiology, King's College London, London, UK.ORCID 0000-0002-6150-4363

Funding

Wellcome Trust
6 · The paper itself

Abstract

The pharyngeal arches are a prominent and significant feature of vertebrate embryos. These are visible as a series of bulges on the lateral surface of the embryonic head. In humans, and other amniotes, there are five pharyngeal arches numbered 1, 2, 3, 4 and 6; note the missing '5'. This is the standard scheme for the numbering of these structures, and it is a feature of modern anatomy textbooks. In this article, we discuss the rationale behind this odd numbering, and consider its origins. One reason given is that there is a transient 5th arch that is never fully realized, while another is that this numbering reflects considerations from comparative anatomy. We show here, however, that neither of these reasons has substance. There is no evidence from embryology for a '5th' arch, and the comparative argument does not hold as it does not apply across the vertebrates. We conclude that there is no justification for this strange numbering. We suggest that the pharyngeal arches should simply be numbered 1, 2, 3, 4 and 5 as this would be in keeping with the embryology and with the general numbering of the pharyngeal arches across the vertebrates.

Indexed as

AnimalsBiological EvolutionBranchial RegionHeadNeural CrestPharynxVertebratesamnioteshuman embryologypharyngeal archespharyngeal pouchestetrapod evolution

Identifiers

PMID31402457
PMCPMC6875933

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.