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Low level methylmercury exposure affects neuropsychological function in adults

Overview of attention for article published in Environmental Health, June 2003
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About this Attention Score

  • In the top 5% of all research outputs scored by Altmetric
  • High Attention Score compared to outputs of the same age (99th percentile)

Mentioned by

news
14 news outlets
blogs
5 blogs
policy
3 policy sources
twitter
2 tweeters
wikipedia
1 Wikipedia page
video
5 video uploaders

Citations

dimensions_citation
148 Dimensions

Readers on

mendeley
37 Mendeley
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Title
Low level methylmercury exposure affects neuropsychological function in adults
Published in
Environmental Health, June 2003
DOI 10.1186/1476-069x-2-8
Pubmed ID
Authors

Edna M Yokoo, Joaquim G Valente, Lynn Grattan, Sérgio Luís Schmidt, Illeane Platt, Ellen K Silbergeld

Abstract

The neurotoxic effects of methylmercury (MeHg) have been demonstrated in both human and animal studies. Both adult and fetal brains are susceptible to the effects of MeHg toxicity. However, the specific effects of adult exposures have been less well-documented than those of children with prenatal exposures. This is largely because few studies of MeHg exposures in adults have used sensitive neurological endpoints. The present study reports on the results of neuropsychological testing and hair mercury concentrations in adults (>17 yrs) living in fishing communities of Baixada Cuiabana (Mato Grosso) in the Pantanal region of Brazil. A cross-sectional study was conducted in six villages on the Cuiaba River. Participants included 129 men and women older than 17 years of age. They were randomly selected in proportion to the age range and number of inhabitants in each village. Questionnaire information was collected on demographic variables, including education, occupation, and residence history. Mercury exposure was determined by analysis of hair using flameless atomic absorption spectrophotometry. The neurocognitive screening battery included tests from the Wechsler Memory Scale and the Wechsler Adult Intelligence Scale, Concentrated Attention Test of the Toulouse-Pierron Factorial Battery, the Manual Ability Subtests of the Tests of Mechanical Ability, and the Profile of Mood States. Mercury exposures in this population were associated with fish consumption. The hair mercury concentration in the 129 subjects ranged from 0.56 to 13.6 microg/g; the mean concentration was 4.2 +/- 2.4 micrograms/g and the median was 3.7 microg/g. Hair mercury levels were associated with detectable alterations in performance on tests of fine motor speed and dexterity, and concentration. Some aspects of verbal learning and memory were also disrupted by mercury exposure. The magnitude of the effects increased with hair mercury concentration, consistent with a dose-dependent effect. This study suggests that adults exposed to MeHg may be at risk for deficits in neurocognitive function. The functions disrupted in adults, namely attention, fine-motor function and verbal memory, are similar to some of those previously reported in children with prenatal exposures.

Twitter Demographics

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Mendeley readers

The data shown below were compiled from readership statistics for 37 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 37 100%

Demographic breakdown

Readers by professional status Count As %
Student > Bachelor 7 19%
Student > Master 5 14%
Student > Ph. D. Student 4 11%
Professor > Associate Professor 3 8%
Student > Postgraduate 2 5%
Other 6 16%
Unknown 10 27%
Readers by discipline Count As %
Medicine and Dentistry 7 19%
Environmental Science 3 8%
Nursing and Health Professions 3 8%
Agricultural and Biological Sciences 2 5%
Pharmacology, Toxicology and Pharmaceutical Science 2 5%
Other 7 19%
Unknown 13 35%

Attention Score in Context

This research output has an Altmetric Attention Score of 160. 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 10 October 2022.
All research outputs
#214,431
of 22,958,253 outputs
Outputs from Environmental Health
#70
of 1,498 outputs
Outputs of similar age
#148
of 50,247 outputs
Outputs of similar age from Environmental Health
#2
of 3 outputs
Altmetric has tracked 22,958,253 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 99th percentile: it's in the top 5% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 1,498 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 31.3. This one has done particularly well, scoring higher than 95% of its peers.
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 50,247 tracked outputs that were published within six weeks on either side of this one in any source. This one has done particularly well, scoring higher than 99% of its contemporaries.
We're also able to compare this research output to 3 others from the same source and published within six weeks on either side of this one.