Daniel A. Colón-Ramos, PhD
McConnell Duberg Professor of Neuroscience and Cell Biology, Yale University
Director, WTI Center for Neurodevelopment and Plasticity
Host(s): Carol Mason (Faculty) and Kapil Ramachandran (Faculty)
Electrical synapses act as a magnitude filter to modulate sensory information processing and behavioral choices in C. elegans
Synaptic configurations in precisely wired circuits underpin how sensory information is processed by the nervous system, and the emerging animal behavior. This is best understood for chemical synapses, but far less is known about how electrical synaptic configurations modulate, in vivo and in specific neurons, sensory information processing and context-specific behaviors. We discovered that INX-1, a gap junction protein that forms electrical synapses, is required to deploy context-specific behavioral strategies during C. elegans thermotaxis behavior. INX-1 couples two bilaterally symmetric interneurons, and this configuration is required for the integration of sensory information during migration of animals across temperature gradients. In inx-1 mutants, uncoupled interneurons display increased excitability and responses to subthreshold temperature stimuli, resulting in abnormally longer run durations and context-irrelevant tracking of isotherms. Our study uncovers a conserved configuration of electrical synapses that, by increasing neuronal capacitance, enables differential processing of sensory information and the deployment of context-specific behavioral strategies.
Relevant Publications:
Integration of Plasticity Mechanism within a Single Sensory Neuron of C. elegans Actuates a Memory
Venue Information:
Speaker Location: Jerome L. Greene Science Center, Kavli Auditorium, 9th Floor Lecture Hall
The Columbia Neuroscience Seminars have been organized to help build community and collaboration among researchers interested in this broad field across campus. The in-person activities, including the talks, provide meaningful interactions for the speakers, many of whom have traveled a long way to visit Columbia. However, if you are a Columbia researcher on another campus and are unable to attend the talk at the Jerome L. Greene Science Center, please email [email protected] at least 48 hours in advance to request an individual, one-time Zoom link (livestream only, no Q&A).
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Tuesdays@10 is a signature Zuckerman Institute initiative that aims to expose researchers at all levels to high-quality science and stimulate scientific discourse. The speakers featured in this series represent various fields and techniques in neuroscience, and include invited guests of the Columbia Neuroscience Seminars, the Zuckerman Institute's Local Circuits Affiliates Program, and other special seminar series through a combined, collaborative effort of one or more of the following: Columbia's Zuckerman Institute, the Center for Precision Psychiatry, the Department of Neuroscience, the Doctoral Program in Neurobiology and Behavior and the Columbia Translational Neuroscience Initiative, and with support from the Kavli Institute for Brain Science.
More information and a full schedule can be found here.