Hearing ability decreases in aging locusts

Gordon, Shira D.; Windmill, James F. C.

doi:10.1242/jeb.115113

Cited by 11 publications

(10 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3A). This is similar to the decrease in displacement at the pyriform vesicle (Gordon and Windmill, 2015), between Locusts 13-days post final moult and older Locust groups ranging from 21-42-dayspost final moult. Locusts do not moult again after their fifth and final moult but continue to add new layers of cuticle in a circadian and temperature-dependent cycle (Neville, 1963).…”

Section: Tympanal Displacement Decreases With Agesupporting

confidence: 74%

Effects of age and noise on tympanal displacement in the Desert Locust

Austin,

Woodrow,

Montealegre-Z

et al. 2023

Preprint

View full text Add to dashboard Cite

Insect cuticle is an evolutionary-malleable exoskeleton that has specialised for various functions. Insects that detect the pressure component of sound bear specialised sound-capturing tympani evolved from cuticular thinning. Whilst the outer layer of insect cuticle is composed of non-living chitin, its mechanical properties change during development and aging. Here, we measured the displacements of the tympanum of the desert Locust, Schistocerca gregaria, to understand biomechanical changes as a function of age and noise-exposure. We found that the stiffness of the tympanum decreases within 12 hours of noise-exposure and increases as a function of age, independent of noise-exposure. Noise-induced changes were dynamic with an increased tympanum displacement to sound within 12 hours post noise-exposure. Within 24 hours, however, the tone-evoked displacement of the tympanum decreased below that of control Locusts. After 48 hours, the tone-evoked displacement of the tympanum was not significantly different to Locusts not exposed to noise. Tympanal displacements reduced predictably with age and repeatably noise-exposed Locusts (every three days) did not differ from their non-noise-exposed counterparts. Changes in the biomechanics of the tympanum may explain an age-dependent decrease in auditory detection in tympanal insects.

show abstract

Section: Tympanal Displacement Decreases With Agesupporting

confidence: 74%

Effects of age and noise on tympanal displacement in the Desert Locust

Austin,

Woodrow,

Montealegre-Z

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…We must now add changes in the cuticle of the tympanum, or possibly its supporting structures. Solitary locusts ( 8 ) had larger tympanal movement over a wide frequency range, but stronger neural responses only to high frequencies (15–20 kHz), whereas aged locusts had lower neural responses that were not correlated with tympanal movement ( 33 ), so the relationship between tympanal movement and sensory response is not straightforward. Aged Drosophila ears had less mechanical gain and reduced stiffness, which was used to predict a 50% reduction in functioning mechanically activated ion channels ( 7 ).…”

Section: Discussionmentioning

confidence: 99%

“…Insects can provide experimental advantages because of their relatively simple anatomy, ease of breeding, rapid development, and reduced costs. Insects have also provided useful models of aging, including loss of hearing with age ( 7 , 8 ), with the additional advantage of a short lifespan.…”

Section: Introductionmentioning

confidence: 99%

Gene transcription changes in a locust model of noise-induced deafness

French

Warren

2021

Journal of Neurophysiology

View full text Add to dashboard Cite

Locust ears have functional and genetic similarities to human ears, including loss of hearing from age or noise exposure. We measured transcript abundances in transcriptomes of noise-exposed and control locust ears. The data indicate remodeling of the ear tympanum and profound reductions in metabolism that may explain reduced sound transduction. These findings advance our understanding of this useful model and suggest further experiments to elucidate mechanisms that ears use to cope with excessive stimulation.

show abstract

“…Gordon & Windmill, 2015). This hearing system is of great interest because as a passive mechanical system it combines both sound reception and frequency analysis.…”

Section: Locustmentioning

confidence: 99%

Mechanical Specializations of Insect Ears

Windmill¹,

Jackson²

2016

Springer Handbook of Auditory Research

Self Cite

View full text Add to dashboard Cite

In this chapter some of the mechanical specializations that insects have evolved to carry out acoustic sensory tasks are reviewed. Although it is easy to perceive insect hearing organs as simplistic compared to other animals, the mechanisms involved can be complex. This chapter therefore acts as an introduction to the complexities of some insect hearing systems, as viewed from a mechanical perspective. The chapter provides some of the background knowledge readers require to investigate the subject in greater depth, while acknowledging that this subject is an active, developing, and broad area of research. Following a brief background section on the physics of sound as applied to the insect ear, the mechanical

show abstract

Hearing ability decreases in aging locusts

Cited by 11 publications

References 11 publications

Effects of age and noise on tympanal displacement in the Desert Locust

Effects of age and noise on tympanal displacement in the Desert Locust

Gene transcription changes in a locust model of noise-induced deafness

Mechanical Specializations of Insect Ears

Contact Info

Product

Resources

About