Experimental Brain Research

, Volume 56, Issue 3, pp 425–437 | Cite as

Iso-frequency 2-DG contours in the inferior colliculus of the awake monkey

  • W. R. Webster
  • J. Servière
  • D. Crewther
  • S. Crewther


Tone bursts produced bands of selective 2-[14C]-deoxyglucose labelling in the inferior colliculus (IC) of the awake monkey. Low tone frequencies produced labelling in dorsal regions and high tone frequencies produced labelling in ventral regions. The position of the bands coincided with the position of a single unit with a characteristic frequency, which was the same as the frequency producing the labelling. These findings indicate that the bands of labelling represent iso-frequency contours in IC. The iso-frequency contours extended across most of the nucleus and were oriented from dorsomedially to ventro-laterally at 20–30° from the horizontal and became more vertical anteriorly. The width of the contours was as narrow as 200 μm, suggesting that the contours might represent 2 or 3 overlapping cellular laminae.

Key words

2-Deoxyglucose Iso-frequency contours Tonotopic organization Monkey 


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Copyright information

© Springer-Verlag 1984

Authors and Affiliations

  • W. R. Webster
    • 1
  • J. Servière
    • 1
  • D. Crewther
    • 1
  • S. Crewther
    • 1
  1. 1.Neuropsychology Laboratory, Psychology DepartmentMonash UniversityClaytonAustralia

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