A system for measuring electrophysiological multiple unit activity and extracellular dopamine concentration at single electrodes

G. E. Glynn, B. K. Yamamoto

Research output: Contribution to journalArticle

7 Scopus citations


A technique is described for measuring electrophysiological multiple-unit activity and extracellular dopamine concentration with in vivo voltammetry at an array of 8 electrodes. In addition, new procedures in the construction of the voltammetric electrode that reduce the effects of capacitance and improve sensitivity are outlined. A system of relays controlling the connections of the electrode and associated systems is also detailed. Both in vitro and in vivo voltammetric selectivity tests indicate an almost exclusive response to dopamine. A large increase in extracellular dopamine concentration was detected in response to 2.5 mg/kg d-amphetamine. Both prestimulus and cortical stimulation evoked increases in striatal multiple-unit activity were measured.

Original languageEnglish (US)
Pages (from-to)235-246
Number of pages12
JournalJournal of Neuroscience Methods
Issue number3
StatePublished - May 1993



  • Amphetamine
  • Basal ganglia
  • Dopamine
  • Electrophysiology
  • In vivo voltammetry
  • Multiple-unit activity
  • Pargyline
  • Striatum
  • α-Methyl-para-tyrosine

ASJC Scopus subject areas

  • Neuroscience(all)

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