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Sebastien Marti

2 papers in the library · 47 citations · publishing 2016-2018

Papers

A theory of working memory without consciousness or sustained activity

bioRxiv Preprint Server December 14, 2016 Darinka Trübutschek, Sebastien Marti, Andrés Ojeda et al. 47 citations preprint

Working memory and conscious perception are often thought to rely on the same brain mechanisms, but recent evidence suggests non-conscious working memory exists. Using visual masking and magnetoencephalography in a spatial delayed-response task, participants reported the location of a subjectively unseen target above chance after a long delay. Conscious perception and conscious working memory showed sustained alpha/beta desynchronization over frontal cortex and decodable target location in posterior sensors. During non-conscious working memory, these signals vanished, contradicting models equating working memory with sustained neural firing. The findings support 'activity-silent' working memory, where slowly decaying synaptic changes allow cell assemblies to go dormant during the delay yet be retrieved above chance after seconds.

DOI: 10.1101/093815 Full text Subconscious recall Non-conscious memory Unaware retention Subconscious memory +20

Conscious Perception: Time for an Update?

arXiv Preprint Archive March 24, 2018 Moti Salti, Asaf Harel, Sebastien Marti

Conscious perception may not be a discrete event but a dynamic process in which a stimulus is continuously recoded to fit an ongoing stream of other perceived stimuli. This hypothesis can reconcile inconsistent findings on the timing of neural correlates of consciousness and makes testable predictions. The updating process is governed by context, stimulus saliency, and the observer's goal. The framework challenges the typical distinction between conscious and unconscious information processing.

Full text Q-bio.nc Consciousness Neuroscience Perception +1