Search results for " Cognition"

Ghost stochastic resonance in FitzHugh–Nagumo circuit

2014

International audience; The response of a neural circuit submitted to a bi-chromatic stimulus and corrupted by noise is investigated. In the presence of noise, when the spike firing of the circuit is analysed, a frequency not present at the circuit input appears. For a given range of noise intensities, it is shown that this ghost frequency is almost exclusively present in the interspike interval distribution. This phenomenon is for the first time shown experimentally in a FitzHugh-Nagumo circuit.

Fluent Speakers of a Second Language Process Graspable Nouns Expressed in L2 Like in Their Native Language

2017

According to embodied cognition, language processing relies on the same neural structures involved when individuals experience the content of language material. If so, processing nouns expressing a motor content presented in a second language should modulate the motor system as if presented in the mother tongue. We tested this hypothesis using a go-no go paradigm. Stimuli included English nouns and pictures depicting either graspable or non-graspable objects. Pseudo-words and scrambled images served as controls. Italian participants, fluent speakers of English as a second language, had to respond when the stimulus was sensitive and refrain from responding when it was not. As foreseen by emb…

Toward a link between brain plasticity and satiety

2021

International audience

Quand notre intestin parle à notre cerveau...

2017

Trois scientifiques interviendront une dizaine de minutes chacun sur les thèmes suivants : • Intestin et humeur, ou les relations entre microbiote, stress et dépression, par le professeur Pierre Déchelotte (CHU de Rouen). • Intestin et maladies métaboliques (obésité, diabète) : l’influence des hormones, par le professeur Claude Knauf (Université de Toulouse) • Intestin et comportement alimentaire : l’influence des nutriments sur les sensations de faim et de satiété, par le docteur Gilles Mithieux (Inserm, Lyon). Suivront 30 à 60 minutes de questions – réponses avec le public.

Quand notre intestin parle à notre cerveau...

2016

Pourquoi j'ai encore faim ?

2019

Comment les sensations de faim et de satiété sont produites par notre cerveau ? Quelle zone de notre cerveau va s’activer aux horaires des repas et sur la base de quelles stimulations ? À travers quelques exemples, Alexandre Benani illustrera l’importance du dialogue entre nos organes et notre cerveau dans l’élaboration de ces sensations.

Odorants' metabolism in Human: a critical role in odor perception revealed

2018

Functional analysis of broadly tuned odorant receptors expressed in the mouse septal organ through patch-clamp recordings in an intact preparation an…

2010

The septal organ (SO) is a small island of olfactory epithelium located at the ventral base of the nasal septum. SO neurons express identified odorant receptors, but its function remains unknown. Using perforated patch clamp recordings, we investigated the response properties of SO neurons in the intact epithelium of mice to a panel of 45 odorants or mixtures. Out of 328 neurons tested, approximately 70% responded to odor stimulation. Among the responsive neurons, 72.5 % responded to multiple odorants. Responding neurons were tested with increasing concentrations of 3 odorants (octanoic acid, (+) camphor, amylacetate) and a mixture (fox urine). Dose-response curves show nanomolar threshold …

Bodies That Matter: Miniaturisation and the Origin(s) of ‘Art’

2020

Small things matter, especially in the so-called ‘arts’. From the visual arts to music and literature, ‘miniatures’ are a transcultural and transhistorical phenomenon that involves our aesthetic attitudes but also our everyday life, our emotional, social and cognitive life. Miniaturisation characterises our cognitive life and, of course, the ‘cognitive life of things’ that we produce, manipulate and discard. My paper is articulated into two sections: the first gives a quick overview of the miniatures of Homo sapiens, especially those of the paleolithic age, and a brief survey of the very challenging history of miniature-interpretation in twentieth-century philosophy of culture. In the secon…

The odour of human milk: Its chemical variability and detection by newborns

2019

International audience; Human milk odour has for long elicited research interest with regard to its function in breastfeeding initiation. The present review aims to provide an overview of the behavioural effects of human milk odour in the human neonate, considering different types of response measures in a feeding or non-feeding context. Further, an overview of the current knowledge of odorant composition and factors influencing milk odour is provided by summarizing results from analytical studies using olfactometry, and addressing changes in milk odour due to storage, lactational stage, and maternal dietary intake of odorous substances. We finally highlight some issues for future research.