Evidence map›Paper›PMID 25057189›Full record

Trial reportThe Journal of neuroscience : the official journal of the Society for Neuroscience2014

A shared, flexible neural map architecture reflects capacity limits in both visual short-term memory and enumeration.

André Knops, Manuela Piazza, Rakesh Sengupta, Evelyn Eger, David Melcher

Abstract readRandomized Controlled Trial
In one paragraph

Trial report in The Journal of neuroscience : the official journal of the Society for Neuroscience, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers.

0numbers the graph read from it
0cells of the map it votes in
28citing 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

28 citing papers in PubMed.

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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.

André KnopsCenter for Mind/Brain Sciences, University of Trento, I-38068 Rovereto, Italy, Department of Psychology, Humboldt University of Berlin, D-12489 Berlin, Germany, knops.andre@gmail.com.
Manuela PiazzaCenter for Mind/Brain Sciences, University of Trento, I-38068 Rovereto, Italy, National Institute of Health and Medical Research, Unit 992, Cognitive Neuroimaging Unit, F-91191 Gif/Yvette, France, Atomic Energy and Alternative Energies Commission, Departement of Life Sciences (DSV)/Biomedical Imaging Institute (I2BM), NeuroSpin Center, F-91191 Gif/Yvette, France, and.
Rakesh SenguptaCenter for Neural and Cognitive Sciences, University of Hyderabad, 500046 Hyderabad, India.
Evelyn EgerNational Institute of Health and Medical Research, Unit 992, Cognitive Neuroimaging Unit, F-91191 Gif/Yvette, France, Atomic Energy and Alternative Energies Commission, Departement of Life Sciences (DSV)/Biomedical Imaging Institute (I2BM), NeuroSpin Center, F-91191 Gif/Yvette, France, and.
David MelcherCenter for Mind/Brain Sciences, University of Trento, I-38068 Rovereto, Italy.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Human cognition is characterized by severe capacity limits: we can accurately track, enumerate, or hold in mind only a small number of items at a time. It remains debated whether capacity limitations across tasks are determined by a common system. Here we measure brain activation of adult subjects performing either a visual short-term memory (vSTM) task consisting of holding in mind precise information about the orientation and position of a variable number of items, or an enumeration task consisting of assessing the number of items in those sets. We show that task-specific capacity limits (three to four items in enumeration and two to three in vSTM) are neurally reflected in the activity of the posterior parietal cortex (PPC): an identical set of voxels in this region, commonly activated during the two tasks, changed its overall response profile reflecting task-specific capacity limitations. These results, replicated in a second experiment, were further supported by multivariate pattern analysis in which we could decode the number of items presented over a larger range during enumeration than during vSTM. Finally, we simulated our results with a computational model of PPC using a saliency map architecture in which the level of mutual inhibition between nodes gives rise to capacity limitations and reflects the task-dependent precision with which objects need to be encoded (high precision for vSTM, lower precision for enumeration). Together, our work supports the existence of a common, flexible system underlying capacity limits across tasks in PPC that may take the form of a saliency map.

Indexed as

AdolescentAdultBrainBrain MappingFemaleHumansMaleMemory, Short-TermNerve NetPhotic StimulationPsychomotor PerformanceVisual PerceptionYoung Adult

Identifiers

PMID25057189
PMCPMC6608304

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.