Evidence map›Paper›PMID 24510607›Full record

ArticleHuman brain mapping2014

Pupil diameter covaries with BOLD activity in human locus coeruleus.

Peter R Murphy, Redmond G O'Connell, Michael O'Sullivan, Ian H Robertson, Joshua H Balsters

Registry-linked trialOpen access · greenAbstract read
In one paragraph

Article in Human brain mapping, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT07402356 (Task-evoked Pupillometry in AD, MCI, and Depression-Related Cognitive Impairment), which is not on this map. Cited by 415 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
415citing papers in PubMed, 1 pooled it
21.3field-weighted citation impact, top 1% 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.

NCT07402356 recruitingnot on this mapstarted 2025, after this paper: background citation

Task-evoked Pupillometry in AD, MCI, and Depression-Related Cognitive Impairment

TypeobservationalSponsorMax-Planck-Institute of PsychiatryRan2025 to 2027Enrolled140ConditionsAlzheimer s Disease, Major Depressive Disorder (MDD), Mild Cognitive Impairment, Dementia
3 · Its place in the literature

Who cites it

415 citing papers in PubMed, 1 synthesis or guideline pooled it, 860 citations in OpenAlex.

  1. Pooled it
  2. Trial
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  7. Effort Mobilization and Lapses of Sustained Attention.Cognitive, affective & behavioral neuroscience · 2022
    Trial
  8. Article
  9. Lapses of attention.Psychonomic bulletin & review · 2026
    Review
  10. Beyond vigilance: A dual-process perspective on visual sustained attention.Cognitive, affective & behavioral neuroscience · 2026
    Article
  11. Article
  12. Observational
  13. Article
  14. Article
  15. Article
  16. Modality-general sensitivity of pupil responses to regularity violations.Cognitive, affective & behavioral neuroscience · 2026
    Article
  17. Article
  18. Article
  19. Arousal state modulates human hippocampal ripples.bioRxiv : the preprint server for biology · 2026
    Article
  20. Article

355 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

5 authors at 1 institution in 1 country.

Peter R MurphyTrinity College Institute of Neuroscience and School of Psychology, Trinity College Dublin, Dublin 2, Ireland.
Redmond G O'Connell
Michael O'Sullivan
Ian H Robertson
Joshua H Balsters
Trinity College Dublin · IE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The locus coeruleus-noradrenergic (LC-NA) neuromodulatory system has been implicated in a broad array of cognitive processes, yet scope for investigating this system's function in humans is currently limited by an absence of reliable non-invasive measures of LC activity. Although pupil diameter has been employed as a proxy measure of LC activity in numerous studies, empirical evidence for a relationship between the two is lacking. In the present study, we sought to rigorously probe the relationship between pupil diameter and BOLD activity localized to the human LC. Simultaneous pupillometry and fMRI revealed a relationship between continuous pupil diameter and BOLD activity in a dorsal pontine cluster overlapping with the LC, as localized via neuromelanin-sensitive structural imaging and an LC atlas. This relationship was present both at rest and during performance of a two-stimulus oddball task, with and without spatial smoothing of the fMRI data, and survived retrospective image correction for physiological noise. Furthermore, the spatial extent of this pupil/LC relationship guided a volume-of-interest analysis in which we provide the first demonstration in humans of a fundamental characteristic of animal LC activity: phasic modulation by oddball stimulus relevance. Taken together, these findings highlight the potential for utilizing pupil diameter to achieve a more comprehensive understanding of the role of the LC-NA system in human cognition.

Indexed as

AdultAttentionBrain MappingCerebrovascular CirculationFemaleHumansLocus CoeruleusMagnetic Resonance ImagingMaleMiddle AgedMonitoring, PhysiologicNeuropsychological TestsOxygenPupilRestSignal Processing, Computer-AssistedOxygenattentionfMRInoradrenalinenorepinephrineoddballpupillometryresting state

Identifiers

PMID24510607
PMCPMC6869043
OpenAlexW1601100579

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

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.