H2020Индивидуална стипендия2019–2021

NeSt · Neural mechanisms of perceptual Stability in magnitude perception

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2019-06-01 → 2021-05-31
Финансиране от ЕС: 171 473 €
Участници: 1
Схема: MSCA-IF-EF-ST

Линиите свързват координатора с партньорите.

Накратко на български

Невронните механизми за възприемане на величините изследват как мозъкът поддържа стабилен образ на света, например колко обекта виждаме, въпреки постоянните движения на очите. Това помага да се разбере как се формира съзнателният ни опит въз основа на сензорната информация.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Neural mechanisms of perceptual Stability in magnitude perception

How do we perceive the world around us? An essential piece of information needed to understand the external environment is the magnitude dimension of the sensory experience: how many objects are around us? And how big are they? How long and how frequent are the important events occurring in a visual scene? To answer these questions, the brain must process magnitude information in a fast and reliable way. An important characteristic of sensory information allowing to make decisions in a reliable way is its stability: objects do not suddenly change in their appearance or position, and we usually perceive the world as a continuous, seamless, stream of information. This is however not trivial, as the machinery of our brain and sensory organs is noisy, and sensory information is made discontinuous by the instability of biological sensors like the eye, constantly moving and shifting to scan the environment. The overarching goal of NeSt was thus to understand how the brain ensures a stable and continuous processing of magnitude information. Understanding the mechanisms of stability is indeed fundamental to further understand how the brain works on a broader level, and to understand how our conscious experience is constructed based on the available sensory information. With NeSt, we have extensively explored the mechanisms and functional properties of stability in magnitude perception, characterizing the rules governing stability across different perceptual dimensions and sensory modalities, the consequences of stability on perception and decision-making, and the dynamics of brain processes involved in stability.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

Magnitude dimensions such as space, time, and numerosity represent fundamental aspects of the external world. A correct perception of these dimensions is needed to understand the spatial properties of the environment and navigate through it, its temporal structure, cause-effect relations, and duration of events, and the number of objects that are present in the visual scene. As magnitude dimensions share similar properties and are often intertwined in the perceptual environment, they are thought to share a similar neural mechanism called the generalized magnitude system. However, while object and events in the space surrounding us usually appear as stable, embedded in a seamless stream of perception, neuronal activity is usually very noisy, and biological sensors like the eye are unstable due to continuous movements. Visual magnitude representation is thus subject to the noisiness of neuronal processing. How does the brain achieve such a remarkable stability despite the noisy nature of its complex machinery? The goal of this proposal is to investigate the brain processes ensuring the stability and continuity of visual magnitude information, using psychophysical, electroencephalography (EEG), and brain stimulation techniques (TMS). Recent studies suggest that to achieve perceptual stability and continuity the brain integrates visual information over time, giving rise to perceptual biases known as serial dependence. While serial dependence has been linked to stability and investigated across several domains, little is known about how magnitude information is stabilized and whether a generalized stability mechanism exists. By taking an interdisciplinary approach, NeSt thus aims to address these issues from a novel perspective and shed new light on the mechanisms ensuring continuity and stability of spatial, temporal, and numerical information.

Оригинален текст от CORDIS (на английски).

Участници

SCUOLA INTERNAZIONALE SUPERIORE DI STUDI AVANZATI DI TRIESTE · TriesteКоординаторИталия