Regulating synaptic strength diversity in hippocampal neurons

Monday, December 10, 2018 - 4:00pm to 5:00pm
Greene Science Center, 9th Floor, 3227 Broadway, New York
Synapses are the fundamental nodes of information transmission in the brain. The efficacy of synaptic transmission, called synaptic strength and its use-dependent changes are crucial for how the brain perceives the environment, learns and stores memories. The highly diverse synaptic strengths found in a given connection at a particular moment in the hippocampal circuit may therefore reflect varied information coding and on-going learning associated with hippocampal-dependent tasks. However, the cellular and molecular basis by which synaptic strength diversity arises, that is, how synaptic strengths are set and controlled across a synapse population remain to be clarified. We have addressed this question by examining the interaction between multiple synapses of hippocampal neurons using a combination of electrophysiology and imaging approaches. We provide evidence for a novel cellular mechanism involving glial cells in regulating the heterogeneity of synaptic strengths across inputs received by single hippocampal neurons. Our findings underscore the role for glia in orchestrating synaptic transmission properties across a synapse population.
Name: 
Yukiko Goda, PhD
Home Institution: 
RIKEN Center for Brain Science
Event Types: 
Neurobiology Seminars