Binary and analog variation of synapses between cortical pyramidal neurons

dc.citation.articleNumbere76120
dc.citation.journalTitleeLife
dc.citation.volumeNumber11
dc.contributor.authorDorkenwald, Sven
dc.contributor.authorTurner, Nicholas L.
dc.contributor.authorMacrina, Thomas
dc.contributor.authorLee, Kisuk
dc.contributor.authorLu, Ran
dc.contributor.authorWu, Jingpeng
dc.contributor.authorBodor, Agnes L.
dc.contributor.authorBleckert, Adam A.
dc.contributor.authorBrittain, Derrick
dc.contributor.authorKemnitz, Nico
dc.contributor.authorSilversmith, William M.
dc.contributor.authorIh, Dodam
dc.contributor.authorZung, Jonathan
dc.contributor.authorZlateski, Aleksandar
dc.contributor.authorTartavull, Ignacio
dc.contributor.authorYu, Szi-Chieh
dc.contributor.authorPopovych, Sergiy
dc.contributor.authorWong, William
dc.contributor.authorCastro, Manuel
dc.contributor.authorJordan, Chris S.
dc.contributor.authorWilson, Alyssa M.
dc.contributor.authorFroudarakis, Emmanouil
dc.contributor.authorBuchanan, JoAnn
dc.contributor.authorTakeno, Marc M.
dc.contributor.authorTorres, Russel
dc.contributor.authorMahalingam, Gayathri
dc.contributor.authorCollman, Forrest
dc.contributor.authorSchneider-Mizell, Casey M.
dc.contributor.authorBumbarger, Daniel J.
dc.contributor.authorLi, Yang
dc.contributor.authorBecker, Lynne
dc.contributor.authorSuckow, Shelby
dc.contributor.authorReimer, Jacob
dc.contributor.authorTolias, Andreas S.
dc.contributor.authorMacarico da Costa, Nuno
dc.contributor.authorReid, R. Clay
dc.contributor.authorSeung, H. Sebastian
dc.date.accessioned2023-01-27T14:47:24Z
dc.date.available2023-01-27T14:47:24Z
dc.date.issued2022
dc.description.abstractLearning from experience depends at least in part on changes in neuronal connections. We present the largest map of connectivity to date between cortical neurons of a defined type (layer 2/3 [L2/3] pyramidal cells in mouse primary visual cortex), which was enabled by automated analysis of serial section electron microscopy images with improved handling of image defects (250 × 140 × 90 μm3 volume). We used the map to identify constraints on the learning algorithms employed by the cortex. Previous cortical studies modeled a continuum of synapse sizes by a log-normal distribution. A continuum is consistent with most neural network models of learning, in which synaptic strength is a continuously graded analog variable. Here, we show that synapse size, when restricted to synapses between L2/3 pyramidal cells, is well modeled by the sum of a binary variable and an analog variable drawn from a log-normal distribution. Two synapses sharing the same presynaptic and postsynaptic cells are known to be correlated in size. We show that the binary variables of the two synapses are highly correlated, while the analog variables are not. Binary variation could be the outcome of a Hebbian or other synaptic plasticity rule depending on activity signals that are relatively uniform across neuronal arbors, while analog variation may be dominated by other influences such as spontaneous dynamical fluctuations. We discuss the implications for the longstanding hypothesis that activity-dependent plasticity switches synapses between bistable states.
dc.identifier.citationDorkenwald, Sven, Turner, Nicholas L., Macrina, Thomas, et al.. "Binary and analog variation of synapses between cortical pyramidal neurons." <i>eLife,</i> 11, (2022) eLife Sciences Publications Ltd.: https://doi.org/10.7554/eLife.76120.
dc.identifier.digitalelife-76120-v2
dc.identifier.doihttps://doi.org/10.7554/eLife.76120
dc.identifier.urihttps://hdl.handle.net/1911/114273
dc.language.isoeng
dc.publishereLife Sciences Publications Ltd.
dc.rightsThis article is distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use and redistribution provided that the original author and source are credited.
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleBinary and analog variation of synapses between cortical pyramidal neurons
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
Files
Original bundle
Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
elife-76120-v2.pdf
Size:
4.54 MB
Format:
Adobe Portable Document Format