Brainstem auditory evoked responses to tone bursts in the echolocating bat, Rousettus

Dianne B. Belknap, Roderick Suthers

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

1. Brainstem auditory evoked potentials (BAEPs) from subcutaneous electrodes were obtained from the megachiropteran echolocating bat, Rousettus aegyptiacus. 2. BAEP amplitude was measured as a function of a stimulus frequency. The lowest thresholds (defined as a 1 μV averaged response) lay between 10 and 20 kHz, and responses could be obtained from 5 to 45 kHz in most individuals (Fig. 3). Threshold increased at a rate of 30 dB/octave below 10 kHz and 40 dB/octave above 17 kHz. 3. Electrode configuration affected some components of the BAEP waveform (Fig. 1), but not the frequency response of the BAEP (Fig. 3). Pentobarbital anesthesia raised BAEP thresholds at all frequencies tested (Fig. 4), when compared with the unanesthetized state. BAEP thresholds were not affected by changes in deep rectal temperature in the range of 29-30 °C (Fig. 4). 4. Comparison of the BAEP frequency response curve with the behavioral audiogram (Fig. 6) suggests that it is an accurate predictor of the region of greatest auditory sensitivity.

Original languageEnglish
Pages (from-to)283-289
Number of pages7
JournalJournal of Comparative Physiology A
Volume146
Issue number3
DOIs
StatePublished - Sep 1982

Fingerprint

Rousettus
evoked potentials
Brain Stem Auditory Evoked Potentials
brain stem
bat
Chiroptera
electrode
electrodes
Electrodes
pentobarbital
Pentobarbital
anesthesia
Anesthesia
temperature
Temperature

ASJC Scopus subject areas

  • Behavioral Neuroscience
  • Neuroscience(all)
  • Physiology (medical)
  • Physiology
  • Animal Science and Zoology

Cite this

Brainstem auditory evoked responses to tone bursts in the echolocating bat, Rousettus. / Belknap, Dianne B.; Suthers, Roderick.

In: Journal of Comparative Physiology A, Vol. 146, No. 3, 09.1982, p. 283-289.

Research output: Contribution to journalArticle

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