Temperature effects on the tympanal membrane and auditory receptor neurons in the locust

Monika Eberhard, Shira Gordon, James Windmill, Bernhard Ronacher

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Poikilothermic animals are affected by variations in environmental temperature, as the basic properties of nerve cells and muscles are altered. Nevertheless, insect sensory systems, such as the auditory system, need to function effectively over a wide range of temperatures, as sudden changes of up to 10°C or more are common. We investigate the performance of auditory receptor neurons and properties of the tympanal membrane of Locusta migratoria in response to temperature changes. Intracellular recordings of receptors at two temperatures (21°C & 28°C) revealed a moderate increase in spike rate with a mean Q10 of 1.4. With rising temperature, the spike rate-intensity-functions exhibited small decreases in thresholds and expansions of the dynamic range, while spike durations decreased. Tympanal membrane displacement, investigated using microscanning laser vibrometry, exhibited a small temperature effect, with a Q10 of 1.2. These findings suggest that locusts are affected by shifts in temperature at the periphery of the auditory pathway, but the effects on spike rate, sensitivity, and tympanal membrane displacement are small. Robust encoding of acoustic signals by only slightly temperature-dependent receptor neurons and almost temperature-independent tympanal membrane properties might enable locusts and grasshoppers to reliably identify sounds in spite of changes of their body temperature.
LanguageEnglish
Pages837-847
Number of pages11
JournalJournal of Comparative Physiology A: Neuroethology, Sensory, Neural, and Behavioral Physiology
Volume200
Issue number9
Early online date22 Jul 2014
DOIs
Publication statusPublished - 2014

Fingerprint

Grasshoppers
locust
locusts
temperature effect
Thermal effects
Neurons
neurons
membrane
Membranes
receptors
Temperature
temperature
body temperature changes
sensory system
Body Temperature Changes
Locusta migratoria
Auditory Pathways
grasshopper
body temperature
grasshoppers

Keywords

  • temperature
  • tympanal membrane
  • auditory receptor neurons
  • hearing
  • insect

Cite this

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title = "Temperature effects on the tympanal membrane and auditory receptor neurons in the locust",
abstract = "Poikilothermic animals are affected by variations in environmental temperature, as the basic properties of nerve cells and muscles are altered. Nevertheless, insect sensory systems, such as the auditory system, need to function effectively over a wide range of temperatures, as sudden changes of up to 10°C or more are common. We investigate the performance of auditory receptor neurons and properties of the tympanal membrane of Locusta migratoria in response to temperature changes. Intracellular recordings of receptors at two temperatures (21°C & 28°C) revealed a moderate increase in spike rate with a mean Q10 of 1.4. With rising temperature, the spike rate-intensity-functions exhibited small decreases in thresholds and expansions of the dynamic range, while spike durations decreased. Tympanal membrane displacement, investigated using microscanning laser vibrometry, exhibited a small temperature effect, with a Q10 of 1.2. These findings suggest that locusts are affected by shifts in temperature at the periphery of the auditory pathway, but the effects on spike rate, sensitivity, and tympanal membrane displacement are small. Robust encoding of acoustic signals by only slightly temperature-dependent receptor neurons and almost temperature-independent tympanal membrane properties might enable locusts and grasshoppers to reliably identify sounds in spite of changes of their body temperature.",
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Temperature effects on the tympanal membrane and auditory receptor neurons in the locust. / Eberhard, Monika; Gordon, Shira; Windmill, James; Ronacher, Bernhard.

In: Journal of Comparative Physiology A: Neuroethology, Sensory, Neural, and Behavioral Physiology, Vol. 200, No. 9, 2014, p. 837-847.

Research output: Contribution to journalArticle

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