Evidence map›Paper›PMID 25909849›Full record

ArticlePloS one2015

Reduced Haemodynamic Response in the Ageing Visual Cortex Measured by Absolute fNIRS.

Laura McKernan Ward, Ross Thomas Aitchison, Melisa Tawse, Anita Jane Simmers, Uma Shahani

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed, 1 pooled it
3.8field-weighted citation impact, top 7% 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

21 citing papers in PubMed, 1 synthesis or guideline pooled it, 33 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Article
  4. Article
  5. Article
  6. Revealing the Spatial Pattern of Brain Hemodynamic Sensitivity to Healthy Aging through Sparse Dynamic Causal Model.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2025
    Article
  7. Article
  8. Article
  9. Article
  10. Hemodynamic Response to Three Types of Urban Spaces before and after Lockdown during the COVID-19 Pandemic.International journal of environmental research and public health · 2021
    Article
  11. Review
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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 at 1 institution in 1 country.

Laura McKernan WardDepartment of Vision Sciences, Glasgow Caledonian University, Glasgow, United Kingdom.
Ross Thomas AitchisonDepartment of Vision Sciences, Glasgow Caledonian University, Glasgow, United Kingdom.
Melisa TawseDepartment of Vision Sciences, Glasgow Caledonian University, Glasgow, United Kingdom.
Anita Jane SimmersDepartment of Vision Sciences, Glasgow Caledonian University, Glasgow, United Kingdom.
Uma ShahaniDepartment of Vision Sciences, Glasgow Caledonian University, Glasgow, United Kingdom.
Glasgow Caledonian University · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The effect of healthy ageing on visual cortical activation is still to be fully explored. This study aimed to elucidate whether the haemodynamic response (HDR) of the visual cortex altered as a result of ageing. Visually normal (healthy) participants were presented with a simple visual stimulus (reversing checkerboard). Full optometric screening was implemented to identify two age groups: younger adults (n = 12, mean age 21) and older adults (n = 13, mean age 71). Frequency-domain Multi-distance (FD-MD) functional Near-Infrared Spectroscopy (fNIRS) was used to measure absolute changes in oxygenated [HbO] and deoxygenated [HbR] haemoglobin concentrations in the occipital cortices. Utilising a slow event-related design, subjects viewed a full field reversing checkerboard with contrast and check size manipulations (15 and 30 minutes of arc, 50% and 100% contrast). Both groups showed the characteristic response of increased [HbO] and decreased [HbR] during stimulus presentation. However, older adults produced a more varied HDR and often had comparable levels of [HbO] and [HbR] during both stimulus presentation and baseline resting state. Younger adults had significantly greater concentrations of both [HbO] and [HbR] in every investigation regardless of the type of stimulus displayed (p<0.05). The average variance associated with this age-related effect for [HbO] was 88% and [HbR] 91%. Passive viewing of a visual stimulus, without any cognitive input, showed a marked age-related decline in the cortical HDR. Moreover, regardless of stimulus parameters such as check size, the HDR was characterised by age. In concurrence with present neuroimaging literature, we conclude that the visual HDR decreases as healthy ageing proceeds.

Indexed as

AdolescentAdultAgedAged, 80 and overAgingCerebrovascular CirculationFemaleHemodynamicsHemoglobinsHumansMaleMiddle AgedOxyhemoglobinsPhotic StimulationRestSpectroscopy, Near-InfrareddeoxyhemoglobinHemoglobinsOxyhemoglobins

Identifiers

PMID25909849
PMCPMC4409147
OpenAlexW2011011368

What OpenQuestion holds

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LicenceCC BY
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.