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DTSTART;TZID=UTC:20220125T110000
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SUMMARY:CNLM Colloquium with Melissa Sharpe\, Ph.D.
DESCRIPTION:The CNLM will be hosting\, Dr. Melissa Sharpe\, Assistant Professor of Behavioral Neuroscience at the University of California\, Los Angeles in a colloquium where she will be presenting her latest research. \nThis year\, the series will be held in a virtual format with some speakers presenting in-person as well. We will keep registered participants updated on the possibility of an in-person event as the situation with COVID-19 evolves. \n\n\n\n\n\nThe finding that dopamine neurons support intracranial self-stimulation (ICSS) has been taken to suggest that phasic firing of dopamine neurons is reinforcing. This is one of the last findings preventing a move away from the value hypothesis of dopamine. Yet there are almost no studies investigating the cognitive basis of ICSS. We tested how dopamine stimulation is represented in the brain during ICSS. We found that physiological frequencies did not support robust ICSS or promote behavior that would indicate the stimulation was represented as a meaningful reward in a specific or general sense. However\, supraphysiological frequencies supported robust ICSS and this was associated with a representation of the stimulation as a specific sensory event that was capable of acting as a goal to motivate behavior. This demonstrates that dopamine neurons only support ICSS at supraphysiological frequencies\, and in a manner that does not reflect our subjective experience with endogenous firing of dopamine neurons during learning. These data provide important considerations for the interpretation of ICSS when used to interrogate the physiological function of dopamine and other neuronal populations.
URL:https://brain.uci.edu/event/cnlm-colloquium-with-melissa-sharpe-ph-d/
LOCATION:CNLM Herklotz Conference Center\, Irvine\, CA\, 92697\, United States
CATEGORIES:Scientific,Staff,Students,Students, Faculty, Staff Only
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ORGANIZER;CN="UCI Center for the Neurobiology of Learning and Memory":MAILTO:memory@uci.edu
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UID:10000286-1643108400-1643112000@brain.uci.edu
SUMMARY:CNCM Seminar: Dr. Joshua Trachtenberg
DESCRIPTION:Please join the UCI Center for Neural Circuit Mapping in a seminar featuring Dr. Joshua Trachtenberg of UCLA. \nFor more information\, please visit: https://cncm.som.uci.edu/seminars/
URL:https://brain.uci.edu/event/cncm-seminar-dr-joshua-trachtenberg/
LOCATION:Virtual Event
CATEGORIES:Scientific,Staff,Students
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