PSY 605 Lecture Notes - Lecture 3: Cardiovascular Disease, Rheumatoid Arthritis, Blood Sugar

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30 May 2018

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• Physiology and Psychology of Stress

• What Is Stress?

• Most simply

• Any physical and/or psychological challenge

• Cognitively

• Condition resulting when person-environment interactions lead individual to

perceive a discrepancy between demands and available resources (e.g., Lazarus,

1999)

• Experienced somatically and psychologically

• Organization of the Nervous System

• Autonomic Nervous System

• Fight-or-Flight Response

Increase in

• Epinephrine & norepinephrine

• Cortisol

• Heart rate & blood pressure

• Levels & mobilization of free fatty acids, cholesterol & triglycerides

• Platelet adhesiveness & aggregation: increases blood clots, prevents severe bleeding if

injured

Decrease in

• Blood flow to the kidneys, skin and gut

• General Adaptation Syndrome

• Selye’s (1956, 1976, 1982) 3 stage model

• Alarm

• Activation of HPA axis

• Body mobilized to resist stressor

• Resistance: after initial shock body prepares to repair itself by reducing sympathetic

arousal

• Sympathetic arousal declines somewhat

• Vulnerable to disease

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