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X Demographics
Mendeley readers
Attention Score in Context
| Title |
An exploratory study of the effects of spatial working-memory load on prefrontal activation in low- and high-performing elderly
|
|---|---|
| Published in |
Frontiers in Aging Neuroscience, November 2014
|
| DOI | 10.3389/fnagi.2014.00303 |
| Pubmed ID | |
| Authors |
Anouk Vermeij, Arenda H. E. A. van Beek, Babette L. R. Reijs, Jurgen A. H. R. Claassen, Roy P. C. Kessels |
| Abstract |
Older adults show more bilateral prefrontal activation during cognitive performance than younger adults, who typically show unilateral activation. This over-recruitment has been interpreted as compensation for declining structure and function of the brain. Here we examined how the relationship between behavioral performance and prefrontal activation is modulated by different levels of working-memory load. Eighteen healthy older adults (70.8 ± 5.0 years; MMSE 29.3 ± 0.9) performed a spatial working-memory task (n-back). Oxygenated ([O2Hb]) and deoxygenated ([HHb]) hemoglobin concentration changes were registered by two functional Near-Infrared Spectroscopy (fNIRS) channels located over the left and right prefrontal cortex. Increased working-memory load resulted in worse performance compared to the control condition. [O2Hb] increased with rising working-memory load in both fNIRS channels. Based on the performance in the high working-memory load condition, the group was divided into low and high performers. A significant interaction effect of performance level and hemisphere on [O2Hb] increase was found, indicating that high performers were better able to keep the right prefrontal cortex engaged under high cognitive demand. Furthermore, in the low performers group, individuals with a larger decline in task performance from the control to the high working-memory load condition had a larger bilateral increase of [O2Hb]. The high performers did not show a correlation between performance decline and working-memory load related prefrontal activation changes. Thus, additional bilateral prefrontal activation in low performers did not necessarily result in better cognitive performance. Our study showed that bilateral prefrontal activation may not always be successfully compensatory. Individual behavioral performance should be taken into account to be able to distinguish successful and unsuccessful compensation or declined neural efficiency. |
X Demographics
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 1 | 100% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Scientists | 1 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 98 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Netherlands | 1 | 1% |
| Italy | 1 | 1% |
| Unknown | 96 | 98% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 19 | 19% |
| Researcher | 19 | 19% |
| Student > Master | 12 | 12% |
| Student > Doctoral Student | 6 | 6% |
| Professor | 3 | 3% |
| Other | 10 | 10% |
| Unknown | 29 | 30% |
| Readers by discipline | Count | As % |
|---|---|---|
| Psychology | 20 | 20% |
| Neuroscience | 13 | 13% |
| Medicine and Dentistry | 7 | 7% |
| Sports and Recreations | 6 | 6% |
| Engineering | 4 | 4% |
| Other | 8 | 8% |
| Unknown | 40 | 41% |
Attention Score in Context
This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 04 December 2014.
All research outputs
#18,385,510
of 22,772,779 outputs
Outputs from Frontiers in Aging Neuroscience
#4,027
of 4,759 outputs
Outputs of similar age
#188,129
of 262,691 outputs
Outputs of similar age from Frontiers in Aging Neuroscience
#54
of 72 outputs
Altmetric has tracked 22,772,779 research outputs across all sources so far. This one is in the 11th percentile – i.e., 11% of other outputs scored the same or lower than it.
So far Altmetric has tracked 4,759 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 13.1. This one is in the 10th percentile – i.e., 10% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 262,691 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 16th percentile – i.e., 16% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 72 others from the same source and published within six weeks on either side of this one. This one is in the 12th percentile – i.e., 12% of its contemporaries scored the same or lower than it.