Non-linear dimensionality reduction on extracellular waveforms reveals cell type diversity in premotor cortex.
Elife
; 102021 08 06.
Article
de En
| MEDLINE
| ID: mdl-34355695
ABSTRACT
Cortical circuits are thought to contain a large number of cell types that coordinate to produce behavior. Current in vivo methods rely on clustering of specified features of extracellular waveforms to identify putative cell types, but these capture only a small amount of variation. Here, we develop a new method (WaveMAP) that combines non-linear dimensionality reduction with graph clustering to identify putative cell types. We apply WaveMAP to extracellular waveforms recorded from dorsal premotor cortex of macaque monkeys performing a decision-making task. Using WaveMAP, we robustly establish eight waveform clusters and show that these clusters recapitulate previously identified narrow- and broad-spiking types while revealing previously unknown diversity within these subtypes. The eight clusters exhibited distinct laminar distributions, characteristic firing rate patterns, and decision-related dynamics. Such insights were weaker when using feature-based approaches. WaveMAP therefore provides a more nuanced understanding of the dynamics of cell types in cortical circuits.
Mots clés
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Cortex moteur
/
Voies nerveuses
Type d'étude:
Prognostic_studies
Limites:
Animals
Langue:
En
Journal:
Elife
Année:
2021
Type de document:
Article
Pays d'affiliation:
États-Unis d'Amérique