Stress and Perception of Emotional Stimuli: Long-term Stress Rewiring the Brain
Introduction: Long-term stressful situations can drastically influence one mental life. However, the effect of mental stress on recognition of emotional stimuli needs to be explored. In this study, recognition of emotional stimuli in a stressful situation was investigated. Four emotional conditions,...
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| Format: | Article |
| Language: | English |
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Iran University of Medical Sciences
2018-03-01
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| Series: | Basic and Clinical Neuroscience |
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| Online Access: | http://bcn.iums.ac.ir/browse.php?a_code=A-10-654-1&slc_lang=en&sid=1 |
| _version_ | 1797284997024972800 |
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| author | Reza Khosrowabadi |
| author_facet | Reza Khosrowabadi |
| author_sort | Reza Khosrowabadi |
| collection | DOAJ |
| description | Introduction: Long-term stressful situations can drastically influence one mental life. However, the effect of mental stress on recognition of emotional stimuli needs to be explored. In this study, recognition of emotional stimuli in a stressful situation was investigated. Four emotional conditions, including positive and negative states in both low and high levels of arousal were analyzed.
Methods: Twenty-six healthy right-handed university students were recruited within or after examination period. Participants stress conditions were measured using the Perceived Stress Scale-14 (PSS-14). All participants were exposed to some audio-visual emotional stimuli while their brains responses were measured using the Electroencephalography (EEG) technique. During the experiment, the subject perception of emotional stimuli is evaluated using the Self-Assessment Manikin (SAM) questionnaire. After recording, EEG signatures of emotional states were estimated from connectivity patterns among 8 brain regions. Connectivity patterns were calculated using Phase Slope Index (PSI), Directed Transfer Function (DTF), and Generalized Partial Direct Coherence (GPDC) methods. The EEG-based connectivity features were then labeled with SAM responses. Subsequently, the labeled features were categorized using two different classifiers. Classification accuracy of the system was validated by leave-one-out method.
Results: As expected, performance of the system is significantly improved by grouping the subjects to stressed and stress-free groups. EEG-based connectivity pattern was influenced by mental stress level.
Conclusion: Changes in connectivity patterns related to long-term mental stress have overlapped with changes caused by emotional stimuli. Interestingly, these changes are detectable from EEG data in eyes-closed condition. |
| first_indexed | 2024-03-07T17:55:49Z |
| format | Article |
| id | doaj.art-6a66279d68e04a8ba26172997342039a |
| institution | Directory Open Access Journal |
| issn | 2008-126X 2228-7442 |
| language | English |
| last_indexed | 2024-03-07T17:55:49Z |
| publishDate | 2018-03-01 |
| publisher | Iran University of Medical Sciences |
| record_format | Article |
| series | Basic and Clinical Neuroscience |
| spelling | doaj.art-6a66279d68e04a8ba26172997342039a2024-03-02T12:14:09ZengIran University of Medical SciencesBasic and Clinical Neuroscience2008-126X2228-74422018-03-0192107120Stress and Perception of Emotional Stimuli: Long-term Stress Rewiring the BrainReza Khosrowabadi0 Institute for Cognitive and Brain Sciences, Shahid Beheshti University, Tehran, Iran. Introduction: Long-term stressful situations can drastically influence one mental life. However, the effect of mental stress on recognition of emotional stimuli needs to be explored. In this study, recognition of emotional stimuli in a stressful situation was investigated. Four emotional conditions, including positive and negative states in both low and high levels of arousal were analyzed. Methods: Twenty-six healthy right-handed university students were recruited within or after examination period. Participants stress conditions were measured using the Perceived Stress Scale-14 (PSS-14). All participants were exposed to some audio-visual emotional stimuli while their brains responses were measured using the Electroencephalography (EEG) technique. During the experiment, the subject perception of emotional stimuli is evaluated using the Self-Assessment Manikin (SAM) questionnaire. After recording, EEG signatures of emotional states were estimated from connectivity patterns among 8 brain regions. Connectivity patterns were calculated using Phase Slope Index (PSI), Directed Transfer Function (DTF), and Generalized Partial Direct Coherence (GPDC) methods. The EEG-based connectivity features were then labeled with SAM responses. Subsequently, the labeled features were categorized using two different classifiers. Classification accuracy of the system was validated by leave-one-out method. Results: As expected, performance of the system is significantly improved by grouping the subjects to stressed and stress-free groups. EEG-based connectivity pattern was influenced by mental stress level. Conclusion: Changes in connectivity patterns related to long-term mental stress have overlapped with changes caused by emotional stimuli. Interestingly, these changes are detectable from EEG data in eyes-closed condition.http://bcn.iums.ac.ir/browse.php?a_code=A-10-654-1&slc_lang=en&sid=1Long-term stress Effective connectivity Electroencephalography (EEG) Emotion |
| spellingShingle | Reza Khosrowabadi Stress and Perception of Emotional Stimuli: Long-term Stress Rewiring the Brain Basic and Clinical Neuroscience Long-term stress Effective connectivity Electroencephalography (EEG) Emotion |
| title | Stress and Perception of Emotional Stimuli: Long-term Stress Rewiring the Brain |
| title_full | Stress and Perception of Emotional Stimuli: Long-term Stress Rewiring the Brain |
| title_fullStr | Stress and Perception of Emotional Stimuli: Long-term Stress Rewiring the Brain |
| title_full_unstemmed | Stress and Perception of Emotional Stimuli: Long-term Stress Rewiring the Brain |
| title_short | Stress and Perception of Emotional Stimuli: Long-term Stress Rewiring the Brain |
| title_sort | stress and perception of emotional stimuli long term stress rewiring the brain |
| topic | Long-term stress Effective connectivity Electroencephalography (EEG) Emotion |
| url | http://bcn.iums.ac.ir/browse.php?a_code=A-10-654-1&slc_lang=en&sid=1 |
| work_keys_str_mv | AT rezakhosrowabadi stressandperceptionofemotionalstimulilongtermstressrewiringthebrain |