Stress and Adaptation: Physiological and Psychological Responses

Ch 43: Stress and Adaptation

Physiologic Stressors

Physiologic stressors are factors that disrupt the body's normal functioning and can trigger adaptive responses. These stressors may originate from internal or external sources.

• Chemical agents: Substances such as toxins, drugs, or pollutants that affect cellular function.

• Physical agents: Environmental factors like heat, cold, radiation, or trauma.

• Infectious agents: Pathogens including bacteria, viruses, and fungi.

• Nutritional imbalances: Deficiencies or excesses in nutrients affecting health.

• Hypoxia: Reduced oxygen supply to tissues.

• Genetic or immune disorders: Inherited conditions or immune system dysfunctions.

Psychosocial Stressors

Psychosocial stressors arise from social and psychological events or conditions that impact mental health and well-being.

• Accidents: Unexpected events causing injury or trauma.

• Traumatic experiences: Stressful events affecting family or friends.

• Horrors of history: Exposure to distressing historical events.

• Fear of aggression or mutilation: Anxiety about personal safety.

• Media exposure: Events brought into homes via television and internet.

• Rapid societal changes: Adjustments to evolving social, political, or work environments.

• Pandemic-related stressors: Social isolation, political divides, and changes in work life.

Physiologic Homeostasis

Local Adaptation Syndrome (LAS)

LAS is a localized response to stress, affecting a specific body part rather than the whole body. It is a short-term, homeostatic adaptation.

• Reflex pain response: An automatic reaction to pain, mediated by the central nervous system.

• Inflammatory response: A localized reaction to injury or infection, involving immune cells and chemical mediators.

Note: The inflammatory response is not a central nervous system response to pain; the reflex pain response is.

General Adaptation Syndrome (GAS)

GAS describes the body's global response to stress, as proposed by Selye (1976). It consists of three stages:

• Alarm Reaction: Initial perception of stressor; activation of defense mechanisms; fight-or-flight response; hormonal changes (e.g., increased adrenaline).

• Stage of Resistance: Body attempts to adapt; vital signs and hormone levels normalize; homeostasis is restored or adaptation fails.

• Stage of Exhaustion: Adaptive mechanisms are depleted; body either recovers or succumbs (potentially leading to illness or death).

Psychological Homeostasis

Mind–Body Interaction

Psychological homeostasis involves the interplay between mental and physical health. Stress can manifest as anxiety and trigger coping or defense mechanisms.

• Anxiety: Emotional response to perceived threats; can range from mild to severe.

• Coping mechanisms: Behaviors used to manage stress and anxiety.

• Defense mechanisms: Unconscious psychological strategies to protect oneself from anxiety or distress.

Note: Moderate anxiety, not mild anxiety, narrows perceptual fields and focuses attention on immediate concerns.

Coping Mechanisms

Coping mechanisms are conscious or unconscious actions to deal with stress.

• Crying, laughing, sleeping, cursing

• Physical activity, exercise

• Deep breathing, mindfulness exercises

• Smoking, drinking (maladaptive coping)

• Withdrawal, lack of eye contact

• Limiting relationships to similar values/interests

Task-Oriented Reactions to Stress

• Attack behavior: Confronting the stressor directly.

• Withdrawal behavior: Avoiding or retreating from the stressor.

• Compromise behavior: Finding a middle ground to reduce stress.

Defense Mechanisms

Defense mechanisms are unconscious strategies to protect against anxiety. Common types include:

• Compensation: Overcoming perceived weaknesses by emphasizing strengths.

• Denial: Refusing to acknowledge reality.

• Displacement: Redirecting emotions to a safer target.

• Dissociation: Separating aspects of experience from consciousness.

• Introjection: Incorporating others' values into oneself.

• Projection: Attributing one's own feelings to others.

• Rationalization: Offering logical explanations for questionable behavior.

• Reaction formation: Adopting attitudes opposite to one's true feelings.

• Regression: Reverting to earlier developmental behaviors.

• Repression: Blocking unpleasant thoughts from consciousness.

• Sublimation: Channeling unacceptable impulses into acceptable activities.

• Undoing: Attempting to cancel out an unacceptable action.

Example: Rationalization is illustrated when a patient blames poor food quality for their behavior after throwing a lunch tray, rather than acknowledging their emotional state.

Effects of Stress

Impact on Basic Human Needs

Stress can affect physical, emotional, and social needs, influencing health and illness.

• Long-term stress: May lead to chronic health issues, impaired immune function, and psychological disorders.

• Family stress: Changes in structure, roles, routines, and financial stability can cause anger, helplessness, and guilt.

• Crisis: Acute stressor overwhelming coping mechanisms, requiring intervention.

Family Stressors

• Changes in family structure and roles

• Anger, helplessness, guilt

• Loss of control over routines

• Concerns about financial stability

Factors Affecting Stress and Adaptation

Sources of Stress

• Developmental stress: Occurs during normal growth and development stages (e.g., adolescence, aging).

• Situational stress: Unpredictable events such as illness, injury, marriage, divorce, loss, new job, or role change.

Example: Marriage or divorce is a situational stressor.

Stressful Activities in Nursing Profession

Nursing professionals face unique stressors, including:

• Assuming responsibilities without adequate preparation

• Working with unqualified personnel

• Lack of supportive supervision

• Caring for patients in critical or end-of-life situations

• Conflict with peers

• Managing disengaged or nonadherent patients

• Ethical dilemmas

Teaching Healthy Activities of Daily Living

Promoting healthy habits can help manage stress and improve well-being.

• Regular exercise

• Rest and sleep

• Balanced nutrition

• Use of support systems

• Stress management techniques

Stress Management Techniques

• Relaxation: Techniques such as deep breathing, progressive muscle relaxation.

• Mindfulness: Focusing attention on the present moment.

• Anticipatory guidance: Preparing for potential stressors by discussing possible outcomes.

• Guided imagery: Creating mental images to reduce responsiveness to stress stimuli.

• Crisis intervention: Structured support during acute stress or crisis.

Note: Guided imagery involves creating a mental image and concentrating on it to reduce responsiveness to stimuli; anticipatory guidance involves preparing for future events.

Crisis Intervention

• Stabilization

• Acknowledgment

• Facilitation of understanding

• Encouragement of effective coping

• Recovery

• Referral

Evaluating the Care Plan

Effective stress management is evaluated by the patient's ability to:

• Verbalize causes and effects of stress and anxiety

• Identify and use sources of support

• Use problem-solving to address stressors

• Practice healthy lifestyle habits and anxiety-reducing techniques

• Report decreased anxiety and increased comfort