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State-Dependency Effects on TMS: A Look at Motive Phosphene Behavior
Published on: December 28, 2010
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Motivation, Perception, and Chance Converge to Make a Binary Decision.
Stephen X Zhang1, Lauren E Miner2, Christine L Boutros2
1Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA.
Neuron
|July 10, 2018
Summary
Male fruit flies
Area of Science:
- Neuroscience
- Ethology
- Behavioral Biology
Background:
- Courtship initiation in male fruit flies is a complex behavior.
- The role of chance neuronal events and motivational state in this decision is not fully understood.
Purpose of the Study:
- To investigate the role of chance neuronal events in male fruit fly courtship initiation.
- To elucidate the neural mechanisms underlying the influence of motivational state on courtship decisions.
Main Methods:
- Electrophysiological recordings from P1 courtship command neurons.
- Behavioral assays tracking courtship initiation and maintenance.
- Genetic manipulation to alter dopamine signaling and receptor expression.
Main Results:
- Neuronal events in male fruit flies can be modeled as a coin flip, with odds influenced by motivational state.
- Dopamine signaling desensitizes P1 neurons to inhibition, increasing courtship initiation probability.
- Dopamine potentiates P1 recurrent excitation, sustaining courtship in motivated males.
- Receptor diversity in P1 allows for tuning of initiation and maintenance propensities.
Conclusions:
- Chance neuronal events play a central role in male fruit fly courtship decisions.
- Motivational systems exploit neural noise to create scalable and flexible behaviors.
- This system provides a model for studying cue-triggered binary decisions.
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