Related Experiment Video
Updated: May 16, 2025
Simultaneous Long-term Recordings at Two Neuronal Processing Stages in Behaving Honeybees
Published on: July 21, 2014
Consistent Hierarchies of Single-Neuron Timescales in Mice, Macaques, and Humans
Zachary R Zeisler1, Marques Love2, Ueli Rutishauser3,4,5,6
1Nash Family Department of Neuroscience, Lipschultz Center for Cognitive Neuroscience, and Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029 peter.rudebeck@mssm.edu.
Neuronal timescales show consistent hierarchical organization across species, with the hippocampus having the shortest and anterior cingulate cortex the longest. This brain organizing principle varies slightly across species, influenced by intrinsic and extrinsic factors.
Area of Science:
- Neuroscience
- Comparative Cognition
- Systems Neuroscience
Background:
- Neuronal intrinsic timescales are fundamental to neural processing.
- Hierarchical organization of timescales is proposed for the cortex.
- Cross-species consistency of this principle is largely unexplored.
Purpose of the Study:
- To investigate if hierarchical variation in neuronal timescales is a general brain organizing principle across mammalian species.
- To compare neuronal timescales across frontal cortex, amygdala, and hippocampus in mice, monkeys, and humans.
- To identify factors influencing variations in neuronal timescales.
Main Methods:
- Task-agnostic recording of thousands of single neurons in mice, monkeys, and humans.
- Estimation of neuronal timescales using a standardized computational method.
- Cross-species comparative analysis of timescale hierarchies in distinct brain regions.
Main Results:
- A largely consistent hierarchy of neuronal timescales was identified across frontal and limbic regions in all species studied.
- The hippocampus exhibited the shortest neuronal timescales, while the anterior cingulate cortex showed the longest.
- Variability in timescales was observed, particularly in the amygdala and orbitofrontal cortex, across species.
Conclusions:
- Hierarchically organized neuronal timescales represent a consistent organizing principle across mammalian species.
- This organization is not solely explained by spiking statistics or cytoarchitectonic features.
- Neuronal timescale organization likely results from a combination of intrinsic neuronal properties and extrinsic factors.
