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  3. Neural Mechanisms for Dynamic Acoustic Communication in Flies
Mala-Murthy picture.jpeg
McGovern Institute for Brain Research
MIT Colloquium on the Brain and Cognition

Neural Mechanisms for Dynamic Acoustic Communication in Flies

Speaker(s)
Mala Murthy, PhD
Add to CalendarAmerica/New_YorkNeural Mechanisms for Dynamic Acoustic Communication in Flies10/22/2015 8:00 pm10/22/2015 9:30 pm46-3002 Singleton Auditorium
October 22, 2015
8:00 pm - 9:30 pm
Location
46-3002 Singleton Auditorium
Contact
Laura Halligan
Host
Michale Fee
    Description

    Social interactions require continually adjusting behavior in response to sensory feedback. For example, when having a conversation, sensory cues from our partner (e.g., sounds or facial expressions) affect our speech patterns in real time. Our speech signals, in turn, are the sensory cues that modify our partner’s actions. What are the underlying computations and neural mechanisms that govern these interactions? To address these questions, my lab studies the acoustic communication system of Drosophila. To our advantage, the fly nervous system is relatively simple, with a wealth of genetic tools to interrogate it. Importantly, Drosophila acoustic behaviors are highly quantifiable and robust. During courtship, males produce time-varying songs via wing vibration, while females arbitrate mating decisions. We discovered that, rather than being a stereotyped fixed action sequence, male song structure and intensity are continually sculpted by interactions with the female, over timescales ranging from tens of milliseconds to minutes – and we are mapping the underlying circuits and computations. We have also developed methods to relate song representations in the female brain to changes in her behavior, across multiple timescales. Our focus on natural acoustic signals, either as the output of the male nervous system or as the input to the female nervous system, provides a powerful, quantitative handle for studying the basic building blocks of communication. 

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