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Download 06-Understanding Stress and Disease
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Transcript
Understanding Stress and Disease How stress influences physical disease • Immune system protects body against stress-related diseases The immune system • Protects body against invasion of foreign material – Viruses – Bacteria – Foreign tissue (e.g. heart transplant) • Removes damaged cells Immune system disorders • Immune deficiency – AIDS • Acquired Immune Deficiency Syndrome – Caused by the HIV virus • Human Immunodeficiency Virus • Destroys the T-cells in the immune system • HIV destroys immune system - AIDS vulnerable to bacterial, viral, and other diseases Transplant rejection • Immune system tries to fight the foreign tissue • Drugs given to reduce effects of immune system Psychoneuroimmunology • Focus of interactions among – Behavior – Nervous system – Endocrine system – Immune system Psychoneuroimmunology • Behavior effects immune system • Immune system affects health Factors decreasing the immune system • Stress • Relationship conflict • Care giving - e.g. Alzheimer’s disease How stress can act to create diseases • Under stress, people – – – – Smoke more Drink more Use illicit drugs Get less sleep • These actions increase risk for various diseases • The higher the person’s stress, the more likely they will become ill. Common cold • Exposure to virus + stress = cold Cardiovascular disease & heart attack • Stress can increase the risk, and trigger heart attack in people with heart disease • Depression, anger, & tension can all increase the risk of heart attack Stress & psychological disorders • Depression – Increased with negative outlook and ruminating over problems • Anxiety disorders – PTSD • Intrusive memories • Recurrent dreams • Psychological and Physiological distress – Most people experiencing traumatic events do not develop PTSD Stress & psychological disorders • No strong relationship between stressful experiences and psychological disorders • While stress may increase the risk for physical and mental problems, most people under stress do not develop a disease, and remain healthy
