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Lecture 3

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Western University
Health Sciences
Health Sciences 1001A/B
Shauna Burke

Lecture 3 Stress Proportion of Canadians who... - Are not frequently stressed: 57% - Have enough quality time: 47% - Feel supported in workplace: 77% - Cope well will stress: 26% - Know stress can lead to heath problems 80% - 53% don’t have enough time for family, friends, or partner or to do things they enjoy - 30% frequently lost sleep or felt nervous over previous month Stress and Anxiety - Anxiety disorders affect 12% of the population, causing mild to severe impairment - Hospitalization rates for anxiety disorders in general hospitals are twice as high among women as men - Social anxiety – very common Stress and Students - Many researchers believe college years are most stressful years in person’s life - Some of the more pertinent factors in experience of stress during university are lifestyle change, friendships, jealousy, and love What is stress? - Stress refers to o Situations that trigger physical and emotional reactions o The reactions themselves - The reading uses o Stressor: situation or event that triggers physical and emotional reaction o Stress response: reaction to stressor o Stress: describe general physical and emotional state that accompanies stress response Actions of Nervous system - Two systems in body responsible for physical response o Nervous system o Endocrine system - Autonomic nervous system o Parasympathetic division (relaxation)  Relaxation, food digestion, stores energy, promotes growth o Sympathetic division (fight or flight response)  Arousal during times of exercise and emergencies  Sympathetic nerves used  Norepinephrine nerves - During exam times, sympathetic is on, when finish sympathetic is exhausted and parasympathetic kicks in and immune system is down as body doesn’t have energy to fight anymore Actions of Endocrine system - Glands, tissues, and cells that help control the bodily functions by releasing hormones - Helps prepare the body to respond to a stressor The Two Systems Working Together - Chemical messages and actions of sympathetic nerves cause the release of key hormones - Hormones trigger physiological changes o Heart and respiration rates accelerate o Hearing and vision become more acute o Liver releases extra sugar to boost energy o Perspiration increases o Brain release endorphins - These changes called fight or flight reaction - Body tries to keep you in homeostasis The Fight-or-Flight Reaction in Modern Life - Has served as a survival mechanism - In modern times, the fight-or-flight reaction is “absurdly inappropriate” Emotional and Behavioral Responses to Stressors - Cognitive mental appraisal o Successful prediction  If can predict what might happen, less stress o Perception of control  If don’t feel like we have control then feel stressed o Highly individual and strongly related to emotions - Effective responses to stress o Talking, laughing, exercise, time management  Exercise huge way to reduce stress - Ineffective responses to stress o Overeating, procrastination, and frustration - Stress can also motivate you to change o Can push you into a state of action Personality and Stress - Personality o Types A, B, and C  Type A: get a negative view o Resilience
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