, Volume 188, Issue 1, pp 92–99

Dopamine receptor stimulation does not modulate the loudness dependence of the auditory evoked potential in humans

  • Barry V. O’Neill
  • Rodney J. Croft
  • Sumie Leung
  • Valérie Guille
  • Matthew Galloway
  • K. Luan Phan
  • Pradeep J. Nathan
Original Investigation



The Loudness Dependence of the Auditory Evoked Potential (LDAEP) has been suggested as a reliable measure of central serotonin function in humans; however, its specificity for the serotonin system remains a topic of debate, with possible modulation of this purported serotonin marker by other neurotransmitters, including dopamine.


We examined the effect of dopaminergic modulation on the LDAEP using the D1/D2/D3 dopamine receptor agonist pergolide and the D2/D3 agonist bromocriptine.


The study was a double-blind, placebo-controlled repeated-measures design in which healthy participants were tested under three acute treatment conditions: placebo, bromocriptine (2.5 mg), and pergolide (0.1 mg). Changes in the amplitude of the N1/P2 at intensities (60, 70, 80, 90, and 100 dB) were examined at CZ.


Acute stimulation of D1/D2/D3 receptors with pergolide and D2/D3 receptors with bromocriptine in comparison with placebo had no effect on the LDAEP.


These findings indicate that acute stimulation of dopamine D1, D2, and D3 receptors does not modulate the LDAEP in humans. Although the findings suggest that the LDAEP may not be modulated by acute changes in dopamine neurotransmission, further studies are needed to fully characterize its dopaminergic sensitivity.


Dopamine Dopamine receptors D1 D2 D3 Loudness Dependence Auditory Evoked Potentials Bromocriptine Pergolide Electrophysiology Biological marker Serotonin 


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Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  • Barry V. O’Neill
    • 1
  • Rodney J. Croft
    • 1
  • Sumie Leung
    • 1
  • Valérie Guille
    • 1
  • Matthew Galloway
    • 2
  • K. Luan Phan
    • 3
    • 4
  • Pradeep J. Nathan
    • 3
  1. 1.Brain Sciences InstituteSwinburne University of TechnologyMelbourneAustralia
  2. 2.Department of Psychiatry and Behavioral NeuroscienceWayne State UniversityDetroitUSA
  3. 3.Behavioural Neuroscience Laboratory, Department of Physiology, Monash Centre for Brain and BehaviourMonash UniversityVictoriaAustralia
  4. 4.Clinical Neuroscience and Psychopharmacology Research Unit, Department of Psychiatry, Biological Sciences Division, and the Pritzker School of MedicineThe University of ChicagoChicagoUSA

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