Evidence map›Paper›PMID 7813682›Full record

ArticleExperimental brain research1994

Phasic stimulation of the locus coeruleus: effects on activity in the lateral geniculate nucleus.

R N Holdefer, B L Jacobs

Abstract read
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In one paragraph

Article in Experimental brain research, 1994. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
0.1field-weighted citation impact, top 71% 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

16 citing papers in PubMed, 38 citations in OpenAlex.

  1. Noradrenaline Regulation of Brain-Body Communication.Advances in experimental medicine and biology · 2025
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  14. Locus ceruleus regulates sensory encoding by neurons and networks in waking animals.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2006
    Article
  15. Article
  16. Review
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.

R N HoldeferDepartment of Biology, Hong Kong University of Science and Technology, Clearwater Bay, Kowloon.
B L Jacobs
Princeton University · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Neurons in the locus coeruleus (LC) encode information related to behavioral state in a tonic pattern of firing and information related to the occurrence of a sensory stimulus in a phasic pattern of firing. The effects of phasic stimulation of the LC (6 pulses at 30 Hz), designed to approximate its physiological activation by sensory stimuli, were studied in the lateral geniculate nucleus (LGN) of anesthetized rats. Phasic stimulation of the LC significantly increased neuronal firing in the LGN with a mean latency 320 ms from onset of stimulation. Receiver operating characteristic analyses on a trial-by-trial basis showed that phasic LC stimulation can result in a highly discriminable signal in the LGN. This increased neuronal firing rate in the LGN was specific for the site of stimulation and was reduced by the norepinephrine synthesis inhibitor alpha-methyl-p-tyrosine and by intravenous WB-4101 (alpha 1-receptor antagonist). Neurons in the LGN have a single-spike firing mode when sensory information is faithfully relayed from retina to cortex and a burst-firing mode when the transfer of this information is degraded. Phasic LC stimulation reduced burst firing (2-5 ms interspike intervals, ISIs) at low frequencies (< or = 4 Hz) in the LGN, and for some neurons there was an absolute decrease in burst-like ISIs after LC stimulation, despite an increase in mean firing rate.

Indexed as

Adrenergic alpha-Antagonistsalpha-MethyltyrosineAnimalsDioxanesElectric StimulationElectrophysiologyGeniculate BodiesLocus CoeruleusMaleMethyltyrosinesNorepinephrineRatsRats, Sprague-DawleyReaction TimeROC Curve(2-(2',6'-dimethoxy)phenoxyethylamino)methylbenzo-1,4-dioxaneAdrenergic alpha-Antagonistsalpha-MethyltyrosineDioxanesMethyltyrosinesNorepinephrine

Identifiers

PMID7813682
OpenAlexW1979766758

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.