Influence of reference electrodes, stimulation characteristics and task paradigms on auditory P50

Chung Ho Chen, Hideaki Ninomiya, Toshiaki Onitsuka

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

To clarify the nature of auditory P50, middle latency auditory evoked potentials were recorded by using different condition of reference electrodes (linked earlobes, LE; balanced non-cephalic, BN), stimulation characteristics (tone burst, human voice) and tasks (counting, simple reaction) in 10 right- handed males (aged 21-36 years). EEG was recorded from Fz, Cz, Pz, C3, C4, T3 and T4 according to the 10-20 system. Two groups of electrode sites were made for the statistical analysis: a midline group. Fz, Cz and Pz; and a lateral group, T3, C3, Cz, C4 and T4. The results were that the P50 amplitudes with BN electrodes were significantly higher than those with LE in both groups (midline, P<0.01; lateral, P<0.01); the P50 amplitudes by voice stimulations were significantly higher than those by tone stimulation in the lateral group (P<0.05), and the P50 latencies under a simple reaction paradigm were significantly shorter than those under a counting task in both groups (midline, P<0.05; lateral, P<0.05). These results suggest that various factors including motor response affect the P50 amplitudes and latencies.

Original languageEnglish
Pages (from-to)139-143
Number of pages5
JournalPsychiatry and Clinical Neurosciences
Volume51
Issue number3
DOIs
Publication statusPublished - Jan 1 1997
Externally publishedYes

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Electrodes
Auditory Evoked Potentials
Electroencephalography

All Science Journal Classification (ASJC) codes

  • Neuroscience(all)
  • Neurology
  • Clinical Neurology
  • Psychiatry and Mental health

Cite this

Influence of reference electrodes, stimulation characteristics and task paradigms on auditory P50. / Chen, Chung Ho; Ninomiya, Hideaki; Onitsuka, Toshiaki.

In: Psychiatry and Clinical Neurosciences, Vol. 51, No. 3, 01.01.1997, p. 139-143.

Research output: Contribution to journalArticle

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