Activity patterns of primary auditory-nerve fibres in chickens: Development of fundamental properties

doi:10.1016/0378-5955(91)90068-K

Hearing Research

Volume 57, Issue 1, December 1991, Pages 1-15

https://doi.org/10.1016/0378-5955(91)90068-K Get rights and content

Abstract

We have examined the activity patterns of single auditory-nerve fibres in the chicken and tested for possible changes during post-hatching development. For this purpose, we recorded from fibres in the cochlear ganglion of chickens of two age groups (about P2 and P21) and investigated their spontaneous and sound-evoked activity patterns under nembutal-chloralhydrate anaesthesia. The spontaneous activity of primary auditory neurones was irregular, the average rates were between 20.5 (P2) and 23 (P21) spikes/s. Many low-frequency fibres from both age groups showed preferred intervals in their spontaneous activity. Tuning characteristics, including the range of characteristic frequencies, the presence of primary and two-tone suppression, the slopes of tuning-curve flanks and Q_{10 dB} values were similar to those previously reported for the starling and were statistically indistinguishable between the two age groups. However, there was a difference in fibre thresholds at the highest frequencies. Systematic differences were also present between the two age groups with regard to some characteristics of the rate-intensity functions. These data indicate that whereas the tuning properties of primary auditory fibres of the chicken cochlea are mature as early as post-hatching day 2, the intensity functions are not.

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Activity patterns of primary auditory-nerve fibres in chickens: Development of fundamental properties

Abstract

Hear. Res.

Hear. Res.

Develop. Brain Res.

Hear. Res.

Hear. Res.

Hear. Res.

Hear. Res.

Brain Res.

Hear. Res.

Hear. Res.

Hear. Res.

Hear. Res.

Hear. Res.

Brain Res.

Hear. Res.

Hear. Res.

Hear. Res.

Hear. Res.

Brain Res.

Brain Res.

Hear. Res.

Develop. Biology

Neuroscience

Neuroscience

Spontaneous and driven responses of semicircular canal primary afferents in the unanaesthetized pigeon

J. Neurophysiol.

projection of the cochlear and lagenar nerves on the cochlear nuclei of the pigeon

J. Comp. Neurol.

Light and electron microscopic studies of the basilar papilla in the duck Anas platyrhynchos. I. The hatchling

J. Comp. Neurol.

Changes in tonotopic organization with age are due to an intensity-dependent, two-step process of hair-cell damage

Soc. Neurosci. Abstr.

The frequency selectivity of auditory nerve fibres and hair cells in the cochlea of the turtle

J. Physiol.

The mechanical properties of ciliary bundles of turtle cochlear hair cells

J. Physiol.

Auditory nerve fibre activity in the tokay gecko: I implications for cochlear processing

J. Comp. Physiol. A

Developmental alteration in the frequency map of the mammalian cochlea

Science

Developmental gradients in the embryonic chicken's basilar papilla

Acta Otolaryngol.

Development of the embryonic chick's statoacoustic ganglion

Acta Otolaryngol.