Experimental Brain Research

, Volume 56, Issue 1, pp 162–166

Differences between cats in response properties of horizontal semicircular canal primary afferents


  • R. J. Peterka
    • Departments of OtolaryngologyUniversity of Pittsburgh
  • D. L. Tomko
    • Departments of PhysiologyUniversity of Pittsburgh

DOI: 10.1007/BF00237453

Cite this article as:
Peterka, R.J. & Tomko, D.L. Exp Brain Res (1984) 56: 162. doi:10.1007/BF00237453


The response properties of cat horizontal canal afferents (N = 81) were characterized by three parameters: their long time constants (τ), low frequency gain constants (G1), and middle frequency gain constants (Gm). An average value of each of these parameters was calculated for each of eight animals and comparisons were made across animals. There were significant differences between individual animals in their average values of τ and Gm. There was also a significant negative correlation between τ's and Gm's. An animal with a larger average τ tended to have a smaller average Gm. We also used anatomic data on membranous canal duct diameter from the literature to independently estimate the potential effect of interanimal anatomic variability on the predicted range of τ and Gm values in a population. We then compared the data from our 81 afferents with the predictions from the anatomic data.

Key words

Vestibular nerve afferentsSemicircular canal biophysicsSemicircular canal time constantsVestibular neurophysiologyCat

Copyright information

© Springer-Verlag 1984