Responses to amplitude modulated infrared stimuli in the guinea pig inferior colliculus

Claus Peter Richter, Hunter Young

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations


Responses of units in the central nucleus of the inferior colliculus of the guinea pig were recorded with tungsten electrodes. The set of data presented here is limited to high stimulus levels. The effect of changing the modulation frequency and the modulation depth was explored for acoustic and laser stimuli. The selected units responded to sinusoidal amplitude modulated (AM) tones, AM trains of clicks, and AM trains of laser pulses with a modulation of their spike discharge. At modulation frequencies of 20 Hz, some units tended to respond with 40 Hz to the acoustic stimuli, but only at 20 Hz for the trains of laser pulses. For all modes of stimulation the responses revealed a dominant response to the first cycle of the modulation, with decreasing number of action potential during successive cycles. While amplitude modulated tone bursts and amplitude modulated trains of acoustic clicks showed similar patterns, the response to trains of laser pulses was different.

Original languageEnglish (US)
Title of host publicationPhotonic Therapeutics and Diagnostics IX
StatePublished - May 30 2013
EventPhotonic Therapeutics and Diagnostics IX - San Francisco, CA, United States
Duration: Feb 2 2013Feb 7 2013

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
ISSN (Print)1605-7422


OtherPhotonic Therapeutics and Diagnostics IX
CountryUnited States
CitySan Francisco, CA


  • Amplitude modulation
  • Cochlea
  • Guinea pig
  • Inferior colliculus
  • Infrared neural stimulation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Radiology Nuclear Medicine and imaging

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