A pilot study with simultaneous recording of changes in motility and cortical electrical activity of rats during four weeks of oral manganese exposure

Szabolcs Takács, Andrea Szabó, Gábor Oszlánczi, Edit Paulik, András Papp

Research output: Contribution to journalArticle


Manganese as an environmental neurotoxicant can cause oral exposure. Six rats were equipped with a connector crown, allowing repeated recording of electrocorticogram (ECoG) with simultaneous recording of motor activity in an open field box. Weekly one 30-min recording session was held, and after two control sessions, four of the six rats had 2.5 mg/ml manganese chloride in their drinking water. The treated rats showed higher motility during the exposure period than the untreated ones; and substantially decreased total ECoG power without marked change the spectrum. The changes of both motility and ECoG were correlated to the individual brain Mn levels, and the activity decrease during a session was correlated to the total ECoG power. These effects can be likened to early adult manganism and to symptoms of children exposed to Mn via drinking water. Repeated simultaneous recording of open field motility and spontaneous cortical activity seems suitable to detect early electrophysiological and behavioral effects of an oral neurotoxic exposure.

Original languageEnglish
Pages (from-to)331-339
Number of pages9
JournalInternational Journal of Environmental Health Research
Issue number4
Publication statusPublished - Aug 1 2012



  • chronic recording
  • electrocorticogram
  • manganese
  • open field
  • rat

ASJC Scopus subject areas

  • Pollution
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis

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