The auditory brain stem response in five vertebrate classes

Corwin, Jeffrey T.; Bullock, Theodore H.; Schweitzer, Jeff

doi:10.1016/0013-4694(82)90117-1

Cited by 156 publications

(70 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 3a-b shows the click-evoked ABR data for echolocation ranges of 2, 4 and 8 m, respectively. In all cases, the ABR is represented by three dominant oscillations, typical for cetacean ABRs [18][19][20][21][22]. They probably represent coherent neural activity in the major nuclei of the auditory system, such as the cochlear nucleus, superior olive and inferior colliculus in the brainstem [21,22].…”

Section: Resultsmentioning

confidence: 99%

“…Hearing can be studied electrophysiologically by noninvasively measuring the auditory brainstem response (ABR) [17,18], which has been used extensively to address many aspects of auditory processing in cetaceans [19][20][21][22]. One can record the ABR elicited by transient acoustic stimuli with contact electrodes on the body surface and average these time-locked to the stimulus onset to reduce the influence of independent additive noise.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Keeping returns optimal: gain control exerted through sensitivity adjustments in the harbour porpoise auditory system

Linnenschmidt

Beedholm

Wahlberg³

et al. 2012

Proc. R. Soc. B.

View full text Add to dashboard Cite

Animals that use echolocation (biosonar) listen to acoustic signals with a large range of intensities, because echo levels vary with the fourth power of the animal's distance to the target. In man-made sonar, engineers apply automatic gain control to stabilize the echo energy levels, thereby rendering them independent of distance to the target. Both toothed whales and bats vary the level of their echolocation clicks to compensate for the distance-related energy loss. By monitoring the auditory brainstem response (ABR) during a psychophysical task, we found that a harbour porpoise (Phocoena phocoena), in addition to adjusting the sound level of the outgoing signals up to 5.4 dB, also reduces its ABR threshold by 6 dB when the target distance doubles. This self-induced threshold shift increases the dynamic range of the biosonar system and compensates for half of the variation of energy that is caused by changes in the distance to the target. In combination with an increased source level as a function of target range, this helps the porpoise to maintain a stable echo-evoked ABR amplitude irrespective of target range, and is therefore probably an important tool enabling porpoises to efficiently analyse and classify received echoes.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Keeping returns optimal: gain control exerted through sensitivity adjustments in the harbour porpoise auditory system

Linnenschmidt

Beedholm

Wahlberg³

et al. 2012

Proc. R. Soc. B.

View full text Add to dashboard Cite

show abstract

“…Fewer hair cells provide fewer sites for signal transduction and also may lead to less relative stimulation upon relative motion of the otolith. Poulson [9] reports an increase in otolith size with increasing cave adaptation in this group and suggests it may be due to different equilibrium demands. If the sensory epithelium is growing in pace with the otolith without concomitant increase in hair cells, a decrease in hair cell density would result.…”

Section: Discussionmentioning

confidence: 99%

“…This method measures the compound electrical potential created by the eighth cranial nerve and auditory brainstem nuclei in response to sound [9,10]. We restrained submerged fish and played 10 msec tones, ranging from 0.1 to 2 kHz at 0.1 Hz intervals.…”

Section: (A) Auditory Evoked Potentialsmentioning

confidence: 99%

Evidence for hearing loss in amblyopsid cavefishes

2013

View full text Add to dashboard Cite

The constant darkness of caves and other subterranean habitats imposes sensory constraints that offer a unique opportunity to examine evolution of sensory modalities. Hearing in cavefishes has not been well explored, and here we show that cavefishes in the family Amblyopsidae are not only blind but have also lost a significant portion of their hearing range. Our results showed that cave and surface amblyopsids shared the same audiogram profile at low frequencies but only surface amblyopsids were able to hear frequencies higher than 800 Hz and up to 2 kHz. We measured ambient noise in aquatic cave and surface habitats and found high intensity peaks near 1 kHz for streams underground, suggesting no adaptive advantage in hearing in those frequencies. In addition, cave amblyopsids had lower hair cell densities compared with their surface relative. These traits may have evolved in response to the loud high-frequency background noise found in subterranean pools and streams. This study represents the first report of auditory regression in a subterranean organism.

show abstract

“…Auditory abilities of 30 bigeye were determined using AEP, a measure of neural activity in auditory periphery, nerve and brainstem in response to sound [13]. For detailed description on the AEP technique used here, see Radford et al [14] and the electronic supplementary material.…”

Section: (B) Auditory Evoked Potentialsmentioning

confidence: 99%

A novel hearing specialization in the New Zealand bigeye,Pempheris adspersa

et al. 2013

View full text Add to dashboard Cite

The New Zealand bigeye, Pempheris adspersa, is a nocturnal planktivore and has recently been found to be an active sound producer. The rostral end of the swim bladder lies adjacent to Baudelot's ligament which spans between the bulla and the cleithrum bone of the pectoral girdle. The aim of this study was to use the auditory evoked potential technique to physiologically test the possibility that this structure provides an enhanced sensitivity to sound pressure in the bigeye. At 100 Hz, bigeye had hearing sensitivity similar to that of goldfish (species with a mechanical connection between the swim bladder and the inner ear mediated by the Weberian ossicles) and were much more sensitive than other teleosts without ancillary hearing structures. Severing Baudelot's ligament bilaterally resulted in a marked decrease in hearing sensitivity, as did swim bladder puncture or lateral line blockage. These results show that bigeye have an enhanced sensitivity to sound pressure and provide experimental evidence that the functional basis of this sensitivity represents a novel hearing specialization in fish involving the swim bladder, Baudelot's ligament and the lateral line.

show abstract

The auditory brain stem response in five vertebrate classes

Cited by 156 publications

References 20 publications

Keeping returns optimal: gain control exerted through sensitivity adjustments in the harbour porpoise auditory system

Keeping returns optimal: gain control exerted through sensitivity adjustments in the harbour porpoise auditory system

Evidence for hearing loss in amblyopsid cavefishes

A novel hearing specialization in the New Zealand bigeye,Pempheris adspersa

Contact Info

Product

Resources

About