The DOI matches its Crossref record; 42 of the 42 references it cites were found in a registry or an index.
A large fraction of neocortical myelin ensheathes axons of local inhibitory neurons
Open accessAbstract
Myelin is best known for its role in increasing the conduction velocity and metabolic efficiency of long-range excitatory axons. Accordingly, the myelin observed in neocortical gray matter is thought to mostly ensheath excitatory axons connecting to subcortical regions and distant cortical areas. Using independent analyses of light and electron microscopy data from mouse neocortex, we show that a surprisingly large fraction of cortical myelin (half the myelin in layer 2/3 and a quarter in layer 4) ensheathes axons of inhibitory neurons, specifically of parvalbumin-positive basket cells. This myelin differs significantly from that of excitatory axons in distribution and protein composition. Myelin on inhibitory axons is unlikely to meaningfully hasten the arrival of spikes at their pre-synaptic terminals, due to the patchy distribution and short path-lengths observed. Our results thus highlight the need for exploring alternative roles for myelin in neocortical circuits.
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Metadata
- Authors
- Micheva, K. D., Wolman, D., Mensh, B. D., Pax, E., Buchanan, J., Smith, S. J., & Bock, D. D.
- Venue
- eLife
- Publisher
- eLife Sciences Publications, Ltd
- Published
- 2016-07-06
- Volume
- 5
- ISSN
- 2050-084X (ISSN-L)
- OpenAlex
- W2465069166
- Cited by
- 282
- References
- 42
- FWCI
- 15.47
- Type
- journal article
- Language
- en
- Open access
- gold
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- Micheva, K. D., Wolman, D., Mensh, B. D., Pax, E., Buchanan, J., Smith, S. J., & Bock, D. D. (2016). A large fraction of neocortical myelin ensheathes axons of local inhibitory neurons. eLife. https://doi.org/10.7554/elife.15784
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