Effect of Islamic fasting on visualattention by event-related potential analysis

Fasting can the psychological and mental state of a person. Previous studies conducted on evaluating the effects of Islamic fasting on visual spatial attention mechanism found no significant effects; however, the temporal mechanism of brain activities was not investigated in those studies. Thus, in...

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Main Author:	Molavi, Maziyar
Format:	Thesis
Language:	English
Published:	2016
Subjects:	RA0421 Public health Hygiene Preventive Medicine
Online Access:	http://eprints.utm.my/id/eprint/84177/1/MaziyarMolaviPFBME2016.pdf
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id	my-utm-ep.84177
record_format	uketd_dc
spelling	my-utm-ep.841772019-12-16T01:56:42Z Effect of Islamic fasting on visualattention by event-related potential analysis 2016 Molavi, Maziyar RA0421 Public health. Hygiene. Preventive Medicine Fasting can the psychological and mental state of a person. Previous studies conducted on evaluating the effects of Islamic fasting on visual spatial attention mechanism found no significant effects; however, the temporal mechanism of brain activities was not investigated in those studies. Thus, in this research we study the effect of Islamic fasting on visual spatial attention through the temporal mechanism of brain activities. This will give us the means to better understand the internal processes of the brain with regard to visual spatial attention. This is done by the process of motivation and emotion using images of food and dynamic facial expression as a realistic source of intervention. There are two major tasks utilized in this study. In the first task, the dot probe method was adopted on 26 participants to investigate the effect of food on visual spatial attention. The second task focused on facial expression using modified Posner method with 40 subjects. Both experiments were conducted before, during and after the month of Ramadan. The reaction time and the event related potential (ERP) components, extracted from recorded EEG during both tasks were measured as the output features of visual attention system. Findings of this study showed that spatial attention is affected by food and facial expression stimuli due to Islamic fasting. Furthermore, the facial expression task showed significant effect of gaze and its interaction with the emotional stimuli. Moreover, according to the findings of the reaction time and ERP analysis, the neural activity showed faster and preference for emotional input rather than gazing input. Besides, the happy facial expression stimuli produce faster results than neutral expression. These results indicated that ERP component coming from the right hemisphere of the brain has more effect than left side. This is consistent with the emotional lateralization concept of emotional processing rather than the valence concept. This is a significant finding since previous researches were not able to resolve these differences. 2016 Thesis http://eprints.utm.my/id/eprint/84177/ http://eprints.utm.my/id/eprint/84177/1/MaziyarMolaviPFBME2016.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:126001 phd doctoral Universiti Teknologi Malaysia, Faculty of Biosciences and Medical Engineering Faculty of Biosciences and Medical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	RA0421 Public health Hygiene Preventive Medicine
spellingShingle	RA0421 Public health Hygiene Preventive Medicine Molavi, Maziyar Effect of Islamic fasting on visualattention by event-related potential analysis
description	Fasting can the psychological and mental state of a person. Previous studies conducted on evaluating the effects of Islamic fasting on visual spatial attention mechanism found no significant effects; however, the temporal mechanism of brain activities was not investigated in those studies. Thus, in this research we study the effect of Islamic fasting on visual spatial attention through the temporal mechanism of brain activities. This will give us the means to better understand the internal processes of the brain with regard to visual spatial attention. This is done by the process of motivation and emotion using images of food and dynamic facial expression as a realistic source of intervention. There are two major tasks utilized in this study. In the first task, the dot probe method was adopted on 26 participants to investigate the effect of food on visual spatial attention. The second task focused on facial expression using modified Posner method with 40 subjects. Both experiments were conducted before, during and after the month of Ramadan. The reaction time and the event related potential (ERP) components, extracted from recorded EEG during both tasks were measured as the output features of visual attention system. Findings of this study showed that spatial attention is affected by food and facial expression stimuli due to Islamic fasting. Furthermore, the facial expression task showed significant effect of gaze and its interaction with the emotional stimuli. Moreover, according to the findings of the reaction time and ERP analysis, the neural activity showed faster and preference for emotional input rather than gazing input. Besides, the happy facial expression stimuli produce faster results than neutral expression. These results indicated that ERP component coming from the right hemisphere of the brain has more effect than left side. This is consistent with the emotional lateralization concept of emotional processing rather than the valence concept. This is a significant finding since previous researches were not able to resolve these differences.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Molavi, Maziyar
author_facet	Molavi, Maziyar
author_sort	Molavi, Maziyar
title	Effect of Islamic fasting on visualattention by event-related potential analysis
title_short	Effect of Islamic fasting on visualattention by event-related potential analysis
title_full	Effect of Islamic fasting on visualattention by event-related potential analysis
title_fullStr	Effect of Islamic fasting on visualattention by event-related potential analysis
title_full_unstemmed	Effect of Islamic fasting on visualattention by event-related potential analysis
title_sort	effect of islamic fasting on visualattention by event-related potential analysis
granting_institution	Universiti Teknologi Malaysia, Faculty of Biosciences and Medical Engineering
granting_department	Faculty of Biosciences and Medical Engineering
publishDate	2016
url	http://eprints.utm.my/id/eprint/84177/1/MaziyarMolaviPFBME2016.pdf
_version_	1747818442017210368

Effect of Islamic fasting on visualattention by event-related potential analysis

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