Evidence map›Paper›PMID 18682212›Full record

ReviewCurrent biology : CB2008

Unearthing the phylogenetic roots of sleep.

Ravi Allada, Jerome M Siegel

Open access · bronzeAbstract readReview
In one paragraph

Review in Current biology : CB, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 136 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
136citing papers in PubMed, 2 pooled it
5.2field-weighted citation impact, top 4% 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

136 citing papers in PubMed, 2 syntheses or guidelines pooled it, 291 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Article
  4. Review
  5. Review
  6. Article
  7. Article
  8. Article
  9. The use ofFrontiers in cell and developmental biology · 2026
    Review
  10. Article
  11. Article
  12. Neurobiology of mitochondrial dynamics in sleep.The Journal of physiology · 2025
    Review
  13. Zebrafish sleep displays distinct sub-states.bioRxiv : the preprint server for biology · 2025
    Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Article

76 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

2 authors at 1 institution in 1 country.

Ravi AlladaDepartment of Neurobiology and Physiology, Northwestern University, 2205 Tech Dr., #2-160, Evanston, Illinois 60208, USA. r-allada@northwestern.edu
Jerome M Siegel
Northwestern University · US

Funding

Hypocretin Release in Disease States and BehaviorR01MH064109 · NIMH · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI SIEGEL, JEROME M · 2001 to 2016
$7.7M
Function of Casein Kinase 2 in the Circadian ClockR01MH067870 · NIMH · NORTHWESTERN UNIVERSITY · PI ALLADA, RAVI · 2003 to 2007
$1.7M
Intercellular Signaling in the Circadian ClockR01NS059042 · NINDS · NORTHWESTERN UNIVERSITY · PI ALLADA, RAVI · 2008 to 2012
$1.6M
Function of the Novel Ion Channel narrow abdomen in Daily RhythmsR01NS052903 · NINDS · NORTHWESTERN UNIVERSITY · PI ALLADA, RAVI · 2005 to 2008
$1.3M
Sleep in CetaceansR01NS042947 · NINDS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI SIEGEL, JEROME M · 2003 to 2006
$1.1M
NIMH NIH HHS R01 MH064109NIMH NIH HHS R01 MH067870NIMH NIH HHS R01MH067870NIMH NIH HHS R01MH64109NINDS NIH HHS 1R01-NS42947NINDS NIH HHS R01 NS042947NINDS NIH HHS R01 NS052903NINDS NIH HHS R01NS052903NINDS NIH HHS R01 NS059042
6 · The paper itself

Abstract

Why we sleep remains one of the enduring unanswered questions in biology. At its core, sleep can be defined behaviorally as a homeostatically regulated state of reduced movement and sensory responsiveness. The cornerstone of sleep studies in terrestrial mammals, including humans, has been the measurement of coordinated changes in brain activity during sleep measured using the electroencephalogram (EEG). Yet among a diverse set of animals, these EEG sleep traits can vary widely and, in some cases, are absent, raising questions as to whether they define a universal, or even essential, feature of sleep. Over the past decade, behaviorally defined sleep-like states have been identified in a series of genetic model organisms, including fish, flies and worms. Genetic analyses in these systems are revealing a remarkable conservation in the underlying mechanisms controlling sleep behavior. Taken together, these studies suggest an ancient origin for sleep and raise the possibility that model organism genetics may reveal the molecular mechanisms that guide sleep and wake.

Indexed as

PhylogenyAnimalsBehavior, AnimalCircadian RhythmHomeostasisHumansModels, AnimalSignal TransductionSleepSpecies SpecificityTime Factors

Identifiers

PMID18682212
PMCPMC2899675
OpenAlexW2021185182

What OpenQuestion holds

Textmetadata
LicenceTDM
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.