Gamma amplitude is coupled to opposed hippocampal theta-phase states during the encoding and retrieval of episodic memories in humans

Ludovico Saint Amour di Chanaz, Alexis Pérez-Bellido, Xiongbo Wu, Diego Lozano‐Soldevilla, Daniel Pacheco-Estefan, Katia Lehongre, Estefanía Conde‐Blanco, Pedro Roldán, Claude Adam, Virginie Lambrecq, Valério Frazzini, Antonio Donaire, Mar Carreño, Vincent Navarro, Antoni Valero‐Cabré, Lluís Fuentemilla