Archives of oto-rhino-laryngology

, Volume 238, Issue 1, pp 17–26 | Cite as

Remotely recorded cochlear microphonic in the cat

  • E. Laukli
  • I. W. S. Mair


The cochlear microphonic (CM) was recorded differentially with subcutaneous electrodes at the vertex and a variety of positions on the head and neck of the cat, and the phase and amplitude were compared with simultaneous recordings from vertex and contralateral ear electrodes. Recordings were made in bilaterally hearing animals, both with and without ear canal occlusion, following unilateral labyrinthectomy, and in white-coat cats with hereditary unilateral deafness, and in different age-groups. The cochlear microphonic was in phase with the contralateral recording at all electrode sites except those in the immediate vicinity of the stimulus ear. The amplitude was less at the circumaural positions and greater at cervical locations. The results were consistent in all age-groups and in bilaterally and unilaterally hearing animals. Precise electrode placement in the near-field conditions around the stimulus ear is therefore critical, especially for phase, while far-field conditions would appear to predominate at the remaining electrode sites.

Key words

Cochlear microphonic Phase Amplitude Cat 


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  1. 1.
    Achor LJ, Starr A (1980) Auditory brain stem responses in the cat. I. Intracranial and extracranial recordings. Electroencephalogr Clin Neurophysiol 48: 154–173Google Scholar
  2. 2.
    Beagley HA (1974) Can we use the cochlear microphonic in electrocochleography? Rev Laryngol Otol Rhinol (Bord) 95: 531–536Google Scholar
  3. 3.
    Dallos P (1973) The Auditory Periphery. Academic Press, New York LondonGoogle Scholar
  4. 4.
    Dallos P, Schoeny ZG, Cheatham MA (1971) On the limitations of cochlear-microphonic measurements. J Acoust Soc Am 49: 1144–1154Google Scholar
  5. 5.
    Davis H, Fernandez C, McAuliffe DR (1950) The excitatory process in the cochlea. Proc Natl Acad Sci USA 36: 580–587Google Scholar
  6. 6.
    Furukawa T, Ishii Y (1967) Neurophysiological studies on hearing in goldfish. J Neurophysiol 30: 1377–1403Google Scholar
  7. 7.
    Hashimoto I, Ishiyama Y, Manaka S, Ebe M, Sano K (1981) Spatial distribution of brainstem auditory evoked potentials and their alterations in lesions of the VIIIth nerve and brainstem. Neurol Res 3: 167–194Google Scholar
  8. 8.
    Hoke M (1976) Problems of cochlear microphonic recording in man. Rev Laryngol Otol Rhinol [Suppl] (Bord) 97: 473–486Google Scholar
  9. 9.
    Jewett DL, Romano MN, Williston JS (1970) Human auditory evoked potentials: possible brain stem components detected on the scalp. Science 167: 1517–1518Google Scholar
  10. 10.
    Laukli E, Mair IWS (1981) Development of surface-recorded cochlear and early neural potentials in the cat. Arch Otorhinolaryngol (NY) 233: 1–12Google Scholar
  11. 11.
    Mair IWS, Elverland HH, Laukli E (1978) Bilateral recording of early auditory evoked responses in the cat. Hearing Res 1: 11–23Google Scholar
  12. 12.
    Mair IWS, Laukli E, Elverland HH (1981) Experimental ABR studies. Scand Audiol [Suppl] 13: 23–32Google Scholar
  13. 13.
    Nunez PL (1981) Electric Fields of the Brain. Oxford University Press, New York OxfordGoogle Scholar
  14. 14.
    Parker DJ (1981) Dependence of the auditory brainstem response on electrode location. Arch Otolaryngol 107: 367–371Google Scholar
  15. 15.
    Plantz RG, Williston JS, Jewett DL (1974) Spatio-temporal distribution of auditory-evoked far field potentials in rat and cat. Brain Res 68: 55–71Google Scholar
  16. 16.
    Rosenblith WA, Rosenzweig MR (1951) Electrical responses to acoustic clicks: influence of electrode location in cats. J Acoust Soc Am 23: 583–588Google Scholar
  17. 17.
    Schwent VL, Jewett DL (1980) Far-field cochlear microphonic responses to continuous pure tones recorded from the scalps of cats. Electroencephalogr Clin Neurophysiol 48: 527–534Google Scholar
  18. 18.
    Sohmer H, Feinmesser M (1967) Cochlear action potentials recorded from the external ear in man. Ann Otol Rhinol Laryngol 76: 427–435Google Scholar
  19. 19.
    Sohmer H, Pratt H (1976) Recording of the cochlear microphonic potential with surface electrodes. Electroencephalogr Clin Neurophysiol 40: 253–260Google Scholar
  20. 20.
    Worden FG, Marsh JT (1968) Frequency-following (microphonic-like) neural responses evoked by sound. Electroencephalogr Clin Neurophysiol 25: 42–52Google Scholar

Copyright information

© Springer-Verlag 1983

Authors and Affiliations

  • E. Laukli
    • 1
    • 2
  • I. W. S. Mair
    • 1
    • 2
  1. 1.Department of OtorhinolaryngologyRegionsykehuset i TromsoNorway
  2. 2.Institute of Clinical MedicineUniversity of TromsøTromsøNorway

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