eating

EATING BEHAVIOR

  • Encompasses food choice, motives, feeding practices, dieting, and eating-related problems.

  • Influenced by several factors:

    • Individual Factors: Physiological, psychological processes, social factors, food rules, observing food behavior.

    • Environmental Factors: Access to food, macro-level economic systems, food, and agricultural policies.

UNDERSTANDING EATING BEHAVIOR

Neurobiological Perspective

  • Involves:

    • Regulatory Pathways: Brain-gut axis, homeostatic and hedonic pathways.

    • Homeostatic Motivations: Energy intake matching expenditure, emphasizing physiological need.

    • Hedonic Motivations: Seeking pleasure from food, intertwining "want" and "like" for pleasurable experiences.

Evolutionary Perspective

  • Eating behavior is an adaptive process essential for survival and reproduction.

  • Homeostasis is influenced by the unpredictable nature of food availability in natural environments.

  • Positive value of food stems from its association with pleasure.

FOOD POSITIVE VALUE

  • Taste is a crucial component influencing eating behavior.

  • Different flavors correspond to specific outcomes:

    • Valued Tastes: Sweet, salty, and fatty tastes are associated with energy and essential nutrients.

    • Less Valued Taste: Bitter is often related to toxins.

OTHER FACTORS INFLUENCING EATING BEHAVIOR

  • Factors include:

    • Cultural, Evolutionary, Social influences.

    • Family, Individual backgrounds.

    • Economic Status, Psychological triggers.

  • Food may be used as a coping mechanism for stress, but can lead to negative feelings and regret.

BODY MASS INDEX (BMI)

  • Calculated by taking weight in kilograms divided by the square of height in meters (BMI=racweight(kg)height(m2)BMI = rac{weight (kg)}{height (m^2)}).

  • BMI Categories:

    • Underweight: < 18.5

    • Normal weight: 18.5 - 24.9

    • Overweight: 25 - 29.9

    • Obesity Class I: 30 - 34.9

    • Obesity Class II: 35 - 39.9

    • Obesity Class III: > 40

ISSUES WITH BMI

  • BMI does not differentiate between fat and muscle mass.

  • It can inaccurately classify athletic individuals as obese due to higher muscle mass.

  • Body fat percentage provides a more comprehensive assessment of health.

OBESITY

  • Defined as a chronic disease characterized by excess body fat.

  • Causes:

    • Genetic, hormonal, metabolic factors.

    • Environmental effects such as eating habits and lifestyle.

    • Psychologically driven behaviors such as tension reduction and lack of foresight related to consequences.

    • Not classified as a mental disorder but correlated with mental health issues.

EATING AND FEEDING DISORDERS (DSM-5)

  • Characterized by persistent disturbances in eating behavior affecting physical health and psychosocial functioning.

  • Share similarities with substance use disorders, including cravings and compulsive patterns.

Anorexia Nervosa

  • Criteria:

    • Restriction of energy intake leading to low body weight.

    • Intense fear of gaining weight.

    • Distorted body image.

    • Prevalence in young females: 0.4%, with a female to male ratio of 10:1.

Bulimia Nervosa

  • Criteria:

    • Recurrent binge-eating episodes followed by compensatory behaviors (e.g., purging).

    • Lack of control during binges.

    • Prevalence: 1% - 1.5% in young females, also a 10:1 female to male ratio.

Binge-Eating Disorder

  • Criteria:

    • Recurrent binge-eating episodes, eating beyond comfortable fullness.

    • Feelings of disgust or guilt post-binge.

    • Occurs at least once a week for 3 months, with prevalence of 1.6% females and 0.8% males.

Muscle Dysmorphic Disorder (Bigorexia)

  • A variant of body dysmorphic disorder focusing on perceived insufficient muscle mass.

  • Symptoms include body image distortion and anxiety over fitness and body fat.

Orthorexia Nervosa

  • Characterized by an obsessive focus on healthy eating, often leading to distress regarding food choices.

  • Can severely impact daily activities and relationships due to rigid dietary practices.

EATING DISORDER INVENTORY (EDI)

  • A self-report tool to assess psychological traits linked to anorexia and bulimia, designed for ages 12 and over.

  • Comprises eight subscales across 64 items; not meant for diagnosing but rather for screening and measuring outcomes.

EDI Subscales

  1. Drive for Thinness: Concern with dieting and fear of weight gain.

  2. Bulimia: Binge-eating episodes and purging behaviors.

  3. Body Dissatisfaction: Dissatisfaction with physical appearance.

  4. Ineffectiveness: Feelings of inadequacy and insecurity.

  5. Perfectionism: Unsatisfied unless perfect.

  6. Interpersonal Distrust: Difficulty forming close relationships.

  7. Interoceptive Awareness: Ability to recognize sensations of hunger versus satiety.

  8. Maturity Fears: Fear of adult life demands.

LEARNING AND SELF-EXPLORATION

  • Keeping an Eating Diary to track eating habits, including:

    • Quantity, type, time, place, company, activity, and mood during meals.

  • Helps in adjusting eating behaviors according to personal needs without the need to submit the diary for review.