Neural representations of courtship song in the Drosophila brain

Sina Tootoonian, Philip Coen, Risa Kawai, Mala Murthy

Research output: Contribution to journalArticle

44 Scopus citations

Abstract

Acoustic communication in drosophilid flies is based on the production and perception of courtship songs, which facilitate mating. Despite decades of research on courtship songs and behavior in Drosophila, central auditory responses have remained uncharacterized. In this study, we report on intracellular recordings from central neurons that innervate the Drosophila antennal mechanosensory and motor center (AMMC), the first relay for auditory information in the fly brain. These neurons produce graded-potential (nonspiking) responses to sound; we compare recordings from AMMC neurons to extracellular recordings of the receptor neuron population [Johnston's organ neurons (JONs)]. We discover that, while steady-state response profiles for tonal and broadband stimuli are significantly transformed between the JON population in the antenna andAMMCneurons in the brain, transient responses to pulses present in natural stimuli (courtship song) are not. For pulse stimuli in particular,AMMCneurons simply low-pass filter the receptor population response, thus preserving low-frequency temporal features (such as the spacing of song pulses) for analysis by postsynaptic neurons. We also compare responses in two closely related Drosophila species, Drosophila melanogaster and Drosophila simulans, and find that pulse song responses are largely similar, despite differences in the spectral content of their songs. Our recordings inform how downstream circuits may read out behaviorally relevant information from central neurons in the AMMC.

Original languageEnglish (US)
Pages (from-to)787-798
Number of pages12
JournalJournal of Neuroscience
Volume32
Issue number3
DOIs
StatePublished - Jan 18 2012

All Science Journal Classification (ASJC) codes

  • Neuroscience(all)

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