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New uses of LFPs: Pathway-specific threads obtained through spatial discrimination.
O Herreras1, J Makarova1, V A Makarov2
1Department of Systems Neuroscience, Cajal Institute, CSIC, Avenida Doctor Arce 37, Madrid 28002, Spain.
Neuroscience
|September 30, 2015
Summary
Local field potentials (LFPs) are complex neural signals. New spatial discrimination techniques can now disentangle LFPs, revealing pathway-specific neural activity for better interpretation.
Area of Science:
- Neurophysiology
- Computational Neuroscience
Background:
- Local field potentials (LFPs) reflect coordinated neural assembly firing, crucial for information processing.
- Interpreting LFPs is challenging due to contributions from multiple neural pathways and populations, obscuring cellular-level insights.
- Spatial factors significantly influence LFP measurements, complicating traditional amplitude and polarity analyses.
Purpose of the Study:
- To review how spatial features of cells and populations shape LFPs.
- To explain why LFPs become indecipherable during co-activation of multiple pathways.
- To present advances in disentangling LFPs using spatial discrimination techniques.
Main Methods:
- Review of recent technical and analytical advances in LFP analysis.
- Discussion of spatial discrimination techniques for separating neural pathway activity.
- Reconstruction of pathway-specific LFP activity.
Main Results:
- Spatial features of neural populations determine LFP amplitude and extension.
- Pathway-specific LFP components can be successfully disentangled.
- Disentangled LFPs offer simpler cellular interpretation and improved experimental applications.
Conclusions:
- Pathway-specific LFP analysis overcomes limitations of traditional methods.
- This approach facilitates parallel population activity readout, behavioral correlation, and plasticity testing.
- Future research can unravel synaptic underpinnings of oscillations and inter-oscillatory dynamics.
