Cited by 79Neural dynamics and brain functionMemory and Neural MechanismsNeuroscience and Neuropharmacology Research

A Modeling Framework for Deriving the Structural and Functional Architecture of a Short-Term Memory Microcircuit

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Fisher, Dimitry, Olasagasti, Itsaso, Tank, David W., Aksay, Emre R.F., Goldman, Mark S.·2013·Neuron

Abstract

Although many studies have identified neural correlates of memory, relatively little is known about the circuit properties connecting single-neuron physiology to behavior. Here we developed a modeling framework to bridge this gap and identify circuit interactions capable of maintaining short-term memory. Unlike typical studies that construct a phenomenological model and test whether it reproduces select aspects of neuronal data, we directly fit the synaptic connectivity of an oculomotor memory circuit to a broad range of anatomical, electrophysiological, and behavioral data. Simultaneous fits to all data, combined with sensitivity analyses, revealed complementary roles of synaptic and neuronal recruitment thresholds in providing the nonlinear interactions required to generate the observed circuit behavior. This work provides a methodology for identifying the cellular and synaptic mechanisms underlying short-term memory and demonstrates how the anatomical structure of a circuit may belie its functional organization.

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Crossref · 10.1016/j.neuron.2013.06.041

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  • Persistent activity in the oculomotor integrator is generated independently by each half of the brain.

    “physiological studies indicating that persistent activity in the oculomotor integrator is generated independently by each half of the brain20,43,44.”

    From Predicting modular functions and neural coding of behavior from a synaptic wiring diagram (2024) · cites this paper as [43]

    The Results section, “Data incorporated into the model” (page not available), reports that neurons on the spared side maintained stable persistent firing at higher rates after contralateral inactivation. But it also reports drift at lower rates, and the Discussion section, “Functional versus structural connectivity” (page not available), says low firing rates are held stable primarily by inhibition driven by the opposing side. The source therefore supports independence only for part of the activity, not the unqualified claim. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • The best fits were obtained with an intrinsic time constant of ~1 s.

    “the best fits were obtained with an intrinsic time constant of ~1 s”
  • This may reflect that most neurons in the contralateral half are below a threshold for transmitting synaptic currents to the opposite side when the eyes are at ipsilateral positions.

    “This may reflect that most neurons in the contralateral half are below a threshold for transmitting synaptic currents to the opposite side when the eyes are at ipsilateral positions43.”

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Authors
Fisher, D., Olasagasti, I., Tank, D. W., Aksay, E. R. F., & Goldman, M. S.
Affiliations
  • University of California, Davis (US)
  • University Hospital Zurich (CH)
  • Princeton University (US)
  • Cornell University (US)
Corresponding author
  • Aksay, Emre R.F.
  • Goldman, Mark S.
Venue
Neuron
Publisher
Elsevier BV
Published
2013-09
Volume
79
Issue
5
Pages
987-1000
ISSN
0896-6273 (ISSN-L)
OpenAlex
W2019135050
Cited by
75
References
51
Citations by year
2026: 7 · 2025: 7 · 2024: 5 · 2023: 7 · 2022: 4 · 2021: 4 · 2020: 5 · 2019: 9 · 2018: 6 · 2017: 2 · 2016: 8 · 2015: 9 · 2014: 2
FWCI
3.11
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • National Science Foundation (1208218)
  • Alfred P. Sloan Foundation
  • Research to Prevent Blindness
  • Wellesley College
  • Searle Scholars Program
  • National Institutes of Health
  • University of California, Davis
  • National Institute of Mental Health (R01MH069726)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
short-term memory, synaptic connectivity, recruitment threshold, sensitivity analysis
MeSH terms
Animals, Goldfish, Memory, Short-Term, Models, Neurological, Nerve Net, Synaptic Transmission, Neurons, Recruitment, Neurophysiological

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