Evidence map›Paper›PMID 22399276›Full record

ReviewMetabolic brain disease2012

Synergistic tonic and phasic activity of the locus coeruleus norepinephrine (LC-NE) arousal system is required for optimal attentional performance.

Fleur M Howells, Dan J Stein, Vivienne A Russell

Abstract readReview
PubMed Publisher
In one paragraph

Review in Metabolic brain disease, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 74 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
74citing papers in PubMed, 1 pooled it
–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

74 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Trial
  3. Beyond vigilance: A dual-process perspective on visual sustained attention.Cognitive, affective & behavioral neuroscience · 2026
    Article
  4. Early life stress induces sex-specific changes in cognitive and affective behavior associated with disrupted noradrenergic physiology.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2026
    Article
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  11. Maternal separation disrupts noradrenergic control of adult coping behaviors.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2025
    Article
  12. Article
  13. Acetaminophen's Role in Autism and ADHD: A Mitochondrial Perspective.International journal of molecular sciences · 2025
    Review
  14. Article
  15. Article
  16. Review
  17. Article
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  19. Article
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14 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

3 authors.

Fleur M HowellsDepartment of Psychiatry, Faculty of Health Sciences, University of Cape Town, Observatory, 7925 Cape Town, South Africa. howellsfleur@gmail.com
Dan J Stein
Vivienne A Russell

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

A certain level of arousal is required for an individual to perform optimally, and the locus coeruleus norepinephrine (LC-NE) system plays a central role in optimizing arousal. Tonic firing of LC-NE neurons needs to be held within a narrow range of 1-3 Hz to facilitate phasic firing of the LC-NE neurons; these two modes of activity act synergistically, to allow the individual to perform attentional tasks optimally. How this information can be applied to further our understanding of psychiatric disorders has not been fully elucidated. Here we propose two models of altered LC-NE activity that result in attentional deficits characteristic of psychiatric disorders: 1) 'hypoaroused' individuals with e.g. attention-deficit/hyperactivity disorder (ADHD) have decreased tonic firing of the LC-NE system, resulting in decreased cortical arousal and poor attentional performance and 2) 'hyperaroused' individuals with e.g. anxiety disorders have increased tonic firing of the LC-NE system, resulting in increased cortical arousal and impaired attentional performance. We argue that hypoarousal (decreased tonic firing of LC-NE neurons) and hyperarousal (increased tonic firing of LC-NE neurons) are suboptimal states in which phasic activity of LC-NE neurons is impeded. To further understand the neurobiology of attentional dysfunction in psychiatric disorders a translational approach that integrates findings on the LC-NE arousal system from animal models and human imaging studies may be useful.

Indexed as

Models, NeurologicalAction PotentialsAnimalsAnxiety DisordersArousalAttentionAttention Deficit Disorder with HyperactivityDisease Models, AnimalHumansLocus Coeruleus

Identifiers

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.