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Haptic Perception in Extreme Obesity: qEEG Study Focused on Predictive Coding and Body Schema

Haptic perception (HP) is a perceptual modality requiring manual exploration to elaborate the physical characteristics of external stimuli through multisensory integrative cortical pathways. Cortical areas exploit processes of predictive coding that collect sensorial inputs to build and update inter...

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Autores principales: Gambino, Giuditta, Giglia, Giuseppe, Schiera, Girolamo, Di Majo, Danila, Epifanio, Maria Stella, La Grutta, Sabina, Lo Baido, Rosa, Ferraro, Giuseppe, Sardo, Pierangelo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7760572/
https://www.ncbi.nlm.nih.gov/pubmed/33255709
http://dx.doi.org/10.3390/brainsci10120908
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author Gambino, Giuditta
Giglia, Giuseppe
Schiera, Girolamo
Di Majo, Danila
Epifanio, Maria Stella
La Grutta, Sabina
Lo Baido, Rosa
Ferraro, Giuseppe
Sardo, Pierangelo
author_facet Gambino, Giuditta
Giglia, Giuseppe
Schiera, Girolamo
Di Majo, Danila
Epifanio, Maria Stella
La Grutta, Sabina
Lo Baido, Rosa
Ferraro, Giuseppe
Sardo, Pierangelo
author_sort Gambino, Giuditta
collection PubMed
description Haptic perception (HP) is a perceptual modality requiring manual exploration to elaborate the physical characteristics of external stimuli through multisensory integrative cortical pathways. Cortical areas exploit processes of predictive coding that collect sensorial inputs to build and update internal perceptual models. Modifications to the internal representation of the body have been associated with eating disorders. In the light of this, obese subjects were selected as a valid experimental model to explore predictive coding in haptic perception. To this purpose, we performed electroencephalographic (EEG) continuous recordings during a haptic task in normally weighted versus obese subjects. EEG power spectra were analyzed in different time intervals. The quality of haptic performance in the obese group was poorer than in control subjects, though exploration times were similar. Spectral analysis showed a significant decrease in theta, alpha and beta frequencies in the right temporo-parietal areas of obese group, whereas gamma bands significantly increased in the left frontal areas. These results suggest that severe obesity could be characterized by an impairment in haptic performances and an altered activation of multisensory integrative cortical areas. These are involved in functional coding of external stimuli, which could interfere with the ability to process a predicted condition.
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spelling pubmed-77605722020-12-26 Haptic Perception in Extreme Obesity: qEEG Study Focused on Predictive Coding and Body Schema Gambino, Giuditta Giglia, Giuseppe Schiera, Girolamo Di Majo, Danila Epifanio, Maria Stella La Grutta, Sabina Lo Baido, Rosa Ferraro, Giuseppe Sardo, Pierangelo Brain Sci Article Haptic perception (HP) is a perceptual modality requiring manual exploration to elaborate the physical characteristics of external stimuli through multisensory integrative cortical pathways. Cortical areas exploit processes of predictive coding that collect sensorial inputs to build and update internal perceptual models. Modifications to the internal representation of the body have been associated with eating disorders. In the light of this, obese subjects were selected as a valid experimental model to explore predictive coding in haptic perception. To this purpose, we performed electroencephalographic (EEG) continuous recordings during a haptic task in normally weighted versus obese subjects. EEG power spectra were analyzed in different time intervals. The quality of haptic performance in the obese group was poorer than in control subjects, though exploration times were similar. Spectral analysis showed a significant decrease in theta, alpha and beta frequencies in the right temporo-parietal areas of obese group, whereas gamma bands significantly increased in the left frontal areas. These results suggest that severe obesity could be characterized by an impairment in haptic performances and an altered activation of multisensory integrative cortical areas. These are involved in functional coding of external stimuli, which could interfere with the ability to process a predicted condition. MDPI 2020-11-25 /pmc/articles/PMC7760572/ /pubmed/33255709 http://dx.doi.org/10.3390/brainsci10120908 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Gambino, Giuditta
Giglia, Giuseppe
Schiera, Girolamo
Di Majo, Danila
Epifanio, Maria Stella
La Grutta, Sabina
Lo Baido, Rosa
Ferraro, Giuseppe
Sardo, Pierangelo
Haptic Perception in Extreme Obesity: qEEG Study Focused on Predictive Coding and Body Schema
title Haptic Perception in Extreme Obesity: qEEG Study Focused on Predictive Coding and Body Schema
title_full Haptic Perception in Extreme Obesity: qEEG Study Focused on Predictive Coding and Body Schema
title_fullStr Haptic Perception in Extreme Obesity: qEEG Study Focused on Predictive Coding and Body Schema
title_full_unstemmed Haptic Perception in Extreme Obesity: qEEG Study Focused on Predictive Coding and Body Schema
title_short Haptic Perception in Extreme Obesity: qEEG Study Focused on Predictive Coding and Body Schema
title_sort haptic perception in extreme obesity: qeeg study focused on predictive coding and body schema
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7760572/
https://www.ncbi.nlm.nih.gov/pubmed/33255709
http://dx.doi.org/10.3390/brainsci10120908
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