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Physiological Foundation of Stress01:24

Physiological Foundation of Stress

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Stress triggers a coordinated physiological response involving the sympathetic nervous system (SNS) and the hypothalamic-pituitary-adrenal (HPA) axis. This dual activation ensures that the body is prepared for both immediate and prolonged stress management. The process begins with the perception of a stressor. This initial phase activates the SNS, leading to the rapid release of adrenaline (epinephrine) from the adrenal glands.
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Psychological responses to stress encompass the various cognitive and emotional reactions individuals experience when faced with challenging or threatening situations, such as a job loss. Prolonged exposure to stressors can disturb emotional balance, increasing negative emotions (e.g., anxiety and sadness) and diminishing positive emotions (e.g., joy and satisfaction). These persistent emotional shifts are associated with an increased risk of both physical illness and mental health issues, such...
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Stress is a multifaceted response to events perceived as challenging or threatening, highlighting physical, emotional, cognitive, and behavioral reactions. Physically, stress can lead to fatigue, sleep disruptions, and various health issues such as frequent colds, chest pains, and nausea. Emotionally, it can manifest as anxiety, depression, irritability, and anger triggered by both minor and major life events. Cognitively, it may result in difficulty in concentration, memory, and...
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Stanley Schachter and Jerome Singer proposed the two-factor theory of emotion, which emphasizes the interplay between physiological arousal and cognitive labeling in forming emotional experiences. This theory suggests that emotions are not simply a result of physiological responses but rather a combination of these responses and the individual's cognitive interpretation of them.
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Components of Stress01:23

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Stress analysis under multiple loading conditions is intricate, necessitating a comprehensive grasp of normal and shearing stresses. Consider a small cube at point O, subjected to stress on all six faces, visible or not. Normal stress components σx, σy, σz act perpendicularly to the x, y, and z axes. Shearing stress components τxy and τxz are exerted on faces perpendicular to these axes.
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Stress Concentrations01:13

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The concept of stress concentration is crucial for understanding how materials respond under bending stresses, particularly when there are irregularities or discontinuities in the material's geometry. Normally, stress in a symmetric member subjected to pure bending is assumed to be uniformly distributed across the entire cross-section. However, this assumption does not hold when there are variations in the cross-sectional geometry or the presence of notches and holes.
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Assessment of Stress Effects on Cognitive Flexibility using an Operant Strategy Shifting Paradigm
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Opera trainees' cognitive functioning is associated with physiological stress during performance.

Negin Motamed Yeganeh1, Taylor McKee1, Janet F Werker1

  • 1The University of British Columbia, Canada.

Musicae Scientiae : the Journal of the European Society for the Cognitive Sciences of Music
|May 24, 2024
PubMed
Summary
This summary is machine-generated.

Opera singers with better cognitive functions, like attention and executive function, experience less performance stress. Higher cognitive function correlates with lower physiological stress during demanding musical performances.

Keywords:
executive functionsheart rate variabilitymusic performanceopera performancephysiological stress

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Area of Science:

  • Cognitive Neuroscience
  • Music Psychology
  • Psychophysiology

Background:

  • Opera singers face significant stress during performances, impacting their ability to execute demanding musical pieces.
  • Previous research indicates a link between enhanced cognitive functions and reduced stress levels in individuals.
  • Cognitive functions such as attention, memory, and executive function are crucial during musical performances.

Purpose of the Study:

  • To investigate the relationship between cognitive functions and physiological stress in opera trainees during performance.
  • To explore how attention, memory, and executive function relate to stress indicators in a live opera setting.

Main Methods:

  • Collected cardiac activity data (heart-rate variability - HRV) from 24 opera trainees during rest and live performance.
  • Assessed cognitive functions using standardized neuropsychological tests: attention (IVA-2), memory (CVLT-3, WMS-IV), and executive function (Trail Making Test).
  • Analyzed the correlation between HRV (as a stress indicator) and cognitive measures in different states (rest vs. performance).

Main Results:

  • Heart-rate variability during rest positively correlated with attention.
  • Heart-rate variability during performance positively correlated with executive function.
  • These findings suggest cognitive function-specific relationships with stress during opera performance.

Conclusions:

  • Greater cognitive function, particularly executive function, is associated with lower physiological stress during opera performances.
  • The study provides initial evidence supporting a connection between cognitive abilities and managing performance stress in musicians.
  • These insights may inform training strategies for opera singers to enhance both cognitive resilience and performance outcomes.