Exam 1 Flashcards
Definition of health
“A positive state of physical, mental, and social well-being – not just the
absence of injury or disease – that varies over time along a continuum.”
Health psychologists focus on…
Understanding psychological and behavioural factors involved in health, finding effective theory/methods to change behaviours, maintenance of health and management of disease.
Chronic disease
Now main cause of death in Canada
Mind-body question
What role does a person’s mind play in becoming ill and getting well?
Biomedical model
The mind and body are entirely separate. All diseases and physical disorders can be explained by disturbances in physiological processes. These disturbances result from injury, infection, and biochemical imbalances. In essence: disease is physical and entirely separate from the processes of the mind. This remains the dominant view in medicine today.
Psychosomatic medicine
Field of medicine formed in the 1930s, linking patterns of personality to specific illnesses. Key premise that anxiety takes a physical toll on the nervous system through the autonomic nervous stem, eventually causing an actual physical problem.
Behavioural medicine
Amid the growing popularity of behaviour modification/cognitive-behavioural approaches of the 60s/70s, observable, testable interventions for health and illness were in demand. Physiological psychologists demonstrated that emotions influenced body systems, such as blood pressure. This revealed that the mind-body link is direct and pervasive, giving rise to biofeedback and integarating knowledge from social sciences.
Current view of the mind-body relationship
All conditions of health and illness are influenced by psychological and social factors. Physical health, therefore, is inextricably intertwined with one’s psychological and social environment. Staying well is determined by good health habits, which are for the most part under one’s control as well as by SDHs.
Smith, Gallo et al. (2012) on personality traits and health
- Low conscientiousness correlated to higher rates of heart diseases
- High happiness and enthusiasm correlated to longer lifespan
- High levels of anxiety, depression, hostility and pessimism at risk for dying early, developing heart conditions
Operant conditioning
In which behaviour is changed because of its consequences: reinforcement (reward) strengthens the behaviour; punishment suppresses it.
Mortality
Occurrence of death, typically on a large scale
Morbidity
Refers to illness, injury, or disability.
Prevalence
Number of cases of illness, disease or disability. It includes both continuing (previously reported) and new cases at a given moment in time.
Incidence
Number of new cases of illness, disease or disability reported during a specific time.
Epidemic
Usually refers to a situation in which the incidence, generally of an infectious disease, has increased rapidly.
Pandemic
Refers to an epidemic that has increased to international or worldwide proportions.
Sympathetic nervous systems
Readies body to deal with stress (catabolic system): the mobilization and exertion of energy
Parasympathetic nervous system
Acts in the opposite direction to SNS: restores body to steady state after threat passes. An anabolic system (concerned with conserving bodily energy)
Neurotransmitters: catecholamines
Neurotransmitters are chemicals that regulate nervous system functioning. When the SNS is triggered due to a perceived threat; it prompts the release of neurotransmitters termed catecholamines (norepinephrine and epinephrine). They enter the bloodstream and are carried throughout the body, ramping up sympathetic stimulation.
Limbic system
Collection of structures that border the midline of the brain. This includes the amygdala (detection of threats), hippocampus (emotional memories), cingulate gyrus, septum, and areas of the hypothalamus (emotional functioning). Plays an important role in stress and emotional responses.
The heart
Organ which functions as a pump, circulating blood throughout the body. The cardiac cycle consists of two phases: systole and diastole. During systole, blood is pumped out of the heart and BP increases. During diastole, blood is taken into the heart and BP drops; the heart rests.
Blood pressure (BP)
The pressure of circulating blood against the walls of the blood vessels. Most of this pressure is from the heart pumping blood through the circulatory system. Normal BP is usually at 120/80mmHg. Systolic BP is pressure when the heart contracts, and diastolic BP is pressure when the heart rests.
Atherosclerosis
Cholesterol deposits plaque buildup on artery walls.
Arteriosclerosis
Hardening of the arteries; arteries thicken and lose flexibility.
Hypertension
High blood pressure
Myocardial infarction
Heart attack
Congestive heart failure
An underlying problem has reduce cardiac capacity to pump
Stroke
Blockage in brain vessel
Function of the immune system
The surveillance system of the body; identifying foreign bodies (bacteria and viruses), attacking and removing them. Impacts infection, allergies, cancer, and autoimmune disease.
Psycho-neuro-immunology
Study of interactions between psychological and neuroendocrine processes that affect
Direct transmission of microbes
Transmission through bodily contact: shaking hands, kissing, sex (HPV, genital herpes).
Indirect (or environmental) transmission of microbes
Passed through airborne particles, soil, dust, water, food (COVID-19, influenza).
Biological transmission of microbes
A transmitting agent picks up microbes, changes them, and passes on the disease to a human (yellow fever).
Mechanical transmission of microbes
Microbes are transmitted by a carrier not involved in disease process (hepatitis).
Incubation period
Time from contraction of infection to appearance of symptoms.
Period of nonspecific symptoms
General discomfort, fatigue, headaches, low mood. This is referred to as Sickness Behaviour, which is associated with the immune system doing its job (releasing cytokines to coordinate the immune response).
Acute phase
Disease and symptoms are at their height. Followed by death or a decline in symptoms while microbes are being expelled from body.
Localized infection
Infection stuck in a particular infection (ear infection).