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Auteur Bernard Querleux
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L'Oréal Research and Innovation - Aulnay - France
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Brain Activation in Response to a Tactile stimulation : functional magnetic resonance imaging (fMRI) versus cognitive analysis / Bernard Querleux in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 21, N° 2 (04/1999)
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Titre : Brain Activation in Response to a Tactile stimulation : functional magnetic resonance imaging (fMRI) versus cognitive analysis Type de document : texte imprimé Auteurs : Bernard Querleux, Auteur ; G. Gazano, Auteur ; O. Mohen-Domenech, Auteur ; J. Jacquin, Auteur ; Y. Burnod, Auteur ; P. Gaudion, Auteur ; O. Jolivet, Auteur ; J. Bittoun, Auteur ; H. Benali, Auteur Année de publication : 1999 Article en page(s) : p. 107-118 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Imagerie cérébrale' 'IRM fonctionnelle' 'Cortex somatosensoriel' 'Stimulation tactile' 'Peau humaine' Index. décimale : 668.5 Parfums et cosmétiques Résumé : The aim of this study was to compare fMRI analysis of somatosensory areas activated by passive touch, to cognitive analysis of the psychological profile of human subjects. Methods. The study was carried out on 21 females, after informed consent. Two artificial textures (smooth and rough), and two natural textures (the skin of an operator modified or not by a cosmetic product), were applied on the fingers of the subjects. A period of imagination to be touched was also included in the study. MR images of the somatosensory cortex were acquired on a 1.5T MRI system during the different behavioral conditions. Series of images were first processed to compensate for the inter-frame motions and then activation was assessed with a statistical method based on conditional analysis. After the MRI protocol, each subject was interviewed following a questionnaire from which psychological descriptors were extracted. Results. 1) Activations were quite similar for all textures in the contralateral sensory areas 2) In the ipsilateral sensory areas, activations were more important in response to a stimulation with the skin of an operator than with artificial textures. The activation was even more important after application of a cosmetic product on the skin. 3) Imagination of the tactile stimulation resulted in an activation mostly localized in the ipsilateral cortex. 4) A PLS analysis assessed that 2 psychological descriptors, rationality and sensorial reactivity, were related to an activation in the contralateral cortex, while 2 others, imagination and sensitivity, were related to ipsilateral areas activation. Conclusion. fMRI and cognitive analysis allowed us to map the physical component of the tactile perception in the contralateral cortex. This study also gave rise to a better understanding of the activation in ipsilateral areas, which was found to be mainly related to the subjective component of the stimulation. DOI : 10.1046/j.1467-2494.1999.198270.x En ligne : https://onlinelibrary.wiley.com/doi/10.1046/j.1467-2494.1999.198270.x Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26496
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 21, N° 2 (04/1999) . - p. 107-118[article]Resistance of human hair cuticle after a shaking process in wet conditions : comparison between chinese and caucasian hair / Anthony Galliano in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 32, N° 5 (10/2010)
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Titre : Resistance of human hair cuticle after a shaking process in wet conditions : comparison between chinese and caucasian hair Type de document : texte imprimé Auteurs : Anthony Galliano, Auteur ; C. Saint-Olive Baque, Auteur ; G. Marty, Auteur ; B. Nedelec, Auteur ; L. Gauchet, Auteur ; P. Littaye, Auteur ; P. Gu, Auteur ; E. Huguet, Auteur ; Bernard Querleux, Auteur ; I. Silberzan, Auteur ; S. Kravtchenko, Auteur ; J. Y. Kempf, Auteur Année de publication : 2010 Article en page(s) : p. 356-368 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cheveux -- Anatomie
Cheveux -- Soins et hygiène
CuticuleTags : 'Cheveux caucasien' chinois' 'Différences anatomiques' 'Vieillissement artificiel' 'Traitement de lissage' Index. décimale : 668.5 Parfums et cosmétiques Résumé : La cuticule est la première protection du cheveu contre les agressions extérieures, comme le brossage ou le brushing qui entraînent un vieillissement du cheveu. L’étude de cheveux chinois et caucasiens, naturels et traités chimiquement, ayant subis un vieillissement artificiel, a permis de comprendre certaines spécificités: la cuticule du cheveu chinois est arrachée en plus petites particules que celle du cheveu caucasien. Ceci semble dûà des considérations géométriques plutôt qu’à des origines ethniques. En effet, ce travail montre que deux caractéristiques géométriques du cheveu humain, la distance inter-écailles et l’angle des écailles, sont directement reliées au diamètre du cheveu et non à l’origine ethnique. Du fait qu’en moyenne le cheveu chinois est plus gros, ses écailles sont plus rapprochées et présentent un angle plus important. De plus, la cuticule du cheveu chinois semble plus sensible aux traitements chimiques que le cheveu caucasien, notamment pour un traitement de lissage que nous présentons en exemple. Cette nouvelle approche apparait intéressante pour la mise au point de produits cosmétiques adaptés aux spécificités des cheveux humains. DOI : 10.1111/j.1468-2494.2009.00563.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1468-2494.2009.00563.x Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10135
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 32, N° 5 (10/2010) . - p. 356-368[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012554 - Périodique Bibliothèque principale Documentaires Disponible Skin of african descent : biophysical and clinical characterization influence of age / Stéphane Diridollou in IFSCC MAGAZINE, Vol. 16, N° 2 (04-05-06/2013)
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Titre : Skin of african descent : biophysical and clinical characterization influence of age Type de document : texte imprimé Auteurs : Stéphane Diridollou, Auteur ; Frédéric Flament, Auteur ; Jean de Rigal, Auteur ; Bernard Querleux, Auteur ; Bertrand Piot, Auteur ; Felicia Dixon-Parks, Auteur ; Roland Bazin, Auteur Année de publication : 2013 Article en page(s) : p. 93-99 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dermatologie
Etude in vivo
Etudes cliniques
Etudes comparatives
Peau
Peau -- analyse
Peau noire
Vieillissement cutanéTags : Peau 'Afro-américain' Caucasien 'Propriétés biophysiques' 'Caractérisation clinique' Ethnicité Atlas Age Index. décimale : 668.5 Parfums et cosmétiques Résumé : The Clinical and biophysical data on African skin, its specific features and effects of aging are rather sparse. Accordingly, we aimed to characterize skin of African descent (African American skin) versus Caucasian skin through biophysical and clinical investigations. Additionally, clinical changes in some skin features as a function of age are reported.
In a first study, in vivo biophysical experiments were performed on the skin of 130 African American and 80 Caucasian women aged 18 to 87 living in the U.S. They included determination of the skin microrelief, color and color evenness, sebaceous function, surface hydration, mechanical properties, and skin structures (epidermis, subepidermal non-echogenic band, dermal epidermal junction, papillary-dermis and dermis). A second study involved a larger cohort of 200 African American and Caucasian women, aged 18-87, who were split into twelve matched 5-year age groups, in order to record age-related changes. Standardized photographs of the face were taken, focusing on various skin features. These included eye bags, under eye wrinkles, crow's feet.
These studies revealed that most of these skin features are common to both the Caucasian and African American populations. Nevertheless, some features were more prominent in or specific to the African American population including
• thicker epidermis and dermal-epidermal junction,
• thicker papillary dermis,
• stronger mechanical properties,
• specific clinical signs such as less depth of vertical upper lip wrinkles and
• more hyperpigmetation as well as pig mentary growths.
Moreover, clinical results showed that expression lines and tissue sagging appear at a later age in this population.
In addition, African American and Caucasian atlases were developed that can be used as an objective tool to evaluate product effectiveness, compare as well as identify the best products, and support efficacy claims.Note de contenu : - EXPERIMENTAL : Study 1 - Biophysical measurements - Color heterogeneity - Sebaceous function - Thickness of the dermal-epidermal junction and epidermis - Study 2 - Clinical
- RESULTS AND DISCUSSION : Biophysical measurements - Clinical evaluationPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18785
in IFSCC MAGAZINE > Vol. 16, N° 2 (04-05-06/2013) . - p. 93-99[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15157 - Périodique Bibliothèque principale Documentaires Disponible