title: The Effects of Fifa 2015 Computer Games on Changes in Cognitive, Hormonal and Brain Waves Functions of Young Men Volunteers.
abstract: BACKGROUND
  Computer games have attracted remarkable attentions in general publics with different cultures and their effects are subject of research by cognitive neuroscientists. In the present study, possible effects of the game Fifa 2015 on cognitive performance, hormonal levels, and electroencephalographic (EEG) signals were evaluated in young male volunteers.
  
  
  METHODS
  Thirty two subjects aged 20 years on average participated mutually in playing computer game Fifa 2015. Identification information and general knowledge about the game were collected. Saliva samples from the contestants were obtained before and after the competition. Perceptive and cognitive performance including the general cognitive health, response delay, attention maintenance, and mental fatigue were measured using PASAT test. EEG were recorded during the play using EEG device and analyzed later using QEEG. Simultaneously, the players' behavior were recorded using a video camera. Saliva cortisol levels were assessed by ELISA kit. Data were analyzed by SPSS program.
  
  
  RESULTS
  The impact of playing computer games on cortisol concentration of saliva before and after the game showed that the amount of saliva plasma after playing the game has dropped significantly. Also the impact of playing computer games on mental health, before and after the game indicated that the number of correct answers has not changed significantly. This indicates that sustained attention has increased in participants after the game in comparison with before that. Also it is shown that mental fatigue measured by PASAT test, did not changed significantly after the game in comparison to before that. The impact of game on changes in brain waves showed that the subjects in high activity state during playing the game had higher power of the EEG signals in most of the channels in lower frequency bands in compared to normal state.
  
  
  CONCLUSIONS
  The present study showed that computer games can positively affect the stress system and the perceptual-cognitive system. Even though this impact was not significant in most cases, the changes in cognitive and hormonal test and also in brain waves were visible. Hence, due to the importance of this matter, it is necessary to create control systems in selecting the types of games for playing.
authors.affiliation: Department of Electrical Engineering, Faculty of Electrical Engineering, Qazvin Branch, Islamic Azad University, Qazvin, Iran.
authors.forename: Hamed
authors.initials: H
authors.lastname: Aliyari
authors.affiliation: Neuroscience Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran.
authors.forename: Masoomeh
authors.initials: M
authors.lastname: Kazemi
authors.affiliation: Neuroscience Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran.
authors.forename: Elaheh
authors.initials: E
authors.lastname: Tekieh
authors.affiliation: Neuroscience Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran.
authors.forename: Maryam
authors.initials: M
authors.lastname: Salehi
authors.affiliation: Neuroscience Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran.
authors.forename: Hedayat
authors.initials: H
authors.lastname: Sahraei
authors.affiliation: Department of Biomedical Engineering, Faculty of Electrical Engineering, Iran University of Science and Technology, Tehran, Iran.
authors.forename: Mohammad Reza
authors.initials: MR
authors.lastname: Daliri
authors.affiliation: Neuroscience Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran.
authors.forename: Hassan
authors.initials: H
authors.lastname: Agaei
authors.affiliation: School of Computer Engineering, Iran University of Science and Technology, Tehran, Iran.
authors.forename: Behrouz
authors.initials: B
authors.lastname: Minaei-Bidgoli
authors.affiliation: Department of Biomedical Engineering, Faculty of Electrical Engineering, Iran University of Science and Technology, Tehran, Iran.
authors.forename: Reza
authors.initials: R
authors.lastname: Lashgari
authors.affiliation: Neuroscience Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran.
authors.forename: Nahid
authors.initials: N
authors.lastname: Srahian
authors.affiliation: Neuroscience Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran.
authors.forename: Mohammad Mehdi
authors.initials: MM
authors.lastname: Hadipour
authors.affiliation: Faculty of Industrial Engineering, K.. N. Toosi University of Technology, Tehran, Iran.
authors.forename: Mostafa
authors.initials: M
authors.lastname: Salehi
authors.affiliation: Department of Scientific Research, Daj, Tehran, Iran.
authors.forename: Asghar
authors.initials: A
authors.lastname: Ranjbar Aghdam
keywords: Cognitive; Cortisol; EEG; Saliva; Video Games