Determinants of adolescent obesity: a comparison with anorexia nervosa

This report investigates childhood and adolescent obesity through a comparison with anorexia nervosa, an eating disorder typically associated with the opposite end of the eating behavior spectrum. Many similarities in the etiologies of the two conditions are discussed, particularly with regard to the influence of family interactional patterns. More specifically, it appears that the families of both anorexics and the obese are characterized by overprotectiveness and enmeshment, resulting in a poor sense of identity and effectiveness. Such children, usually compliant and dependent in childhood, misuse the eating function in an attempt to assert their independence and gain control of their lives in adolescence. According to the Diagnostic and Statistical Manual of Mental Disorders (DSM-III-R), anorexia nervosa, but not obesity, meets the definition of an eating disorder. Although it appears that DSM-III-R is accurate in not classifying obesity as an eating disorder, it is important to keep the etiological similarities of the two conditions in mind when treating obesity.     

Psychological aspects of anorexia nervosa

Research on anorexia nervosa (AN), its etiology and treatment, and the results of outcome studies are reviewed. Early studies focused on psychodynamic aspects of AN whereas recently the brain's neurotransmitters and hypothalamic area, particularly, having been investigated as contributing to symptoms of AN. No treatment is successful for all AN patients. Recovery is slow and is often resisted. Diet, psychotherapy, and drugs have sometimes alleviated symptoms for some AN patients but the root cause and the best treatment have eluded a century of research.     

Possible differences in family patterns in anorexia nervosa and bulimia nervosa

This paper examines the interactions in three families, one where the daughter had anorexia nervosa and two where the daughters had bulimia nervosa, and proposes some differences in the families’ patterns of enmeshment. It is hypothesized that these may be linked to differences in the development of the mother—child relationship. Implications for the choice of therapeutic strategies are discussed.     

Action monitoring and perfectionism in anorexia nervosa

To study action monitoring in anorexia nervosa, behavioral and EEG measures were obtained in underweight anorexia nervosa patients (n=17) and matched healthy controls (n=19) while performing a speeded choice-reaction task. Our main measures of interest were questionnaire outcomes, reaction times, error rates, and the error-related negativity ERP component. Questionnaire and behavioral results indicated increased perfectionism in patients with anorexia nervosa. In line with their perfectionism and controlled response style patients made significantly less errors than controls. However, when controlling for this difference in error rates, the EEG results demonstrated a reduced error-related negativity in the patient group. These seemingly contradictory outcomes of improved performance and reduced error monitoring are discussed in relation with indications of anterior cingulate cortex hypoactivity in anorexia nervosa patients.     

Adolescent eating disorder: anorexia nervosa

Anorexia nervosa is an eating disorder observed with increasing frequency, especially among adolescent females. No consensus exists concerning the causes of the disorder. Social, psychosexual, family system, biological theories, and the regression hypothesis have been advanced to explain the phenomenon. The major characteristics are 25% loss of body weight, use of various means to lose weight, weight phobia, preoccupation with food, body image disturbances, as well as numerous associated medical conditions: bradycardia, hypotension, dehydration, hypothermia, electrolyte abnormalities, amenorrhea, metabolic changes, and abdominal distress. Anorexic adolescents resist treatment and may die if not cured. The following therapeutic modalities have been effective: hospitalization, and cognitive, behavioral, and family therapy. Some of the typical family patterns, early characteristics, social adjustment problems, and society's contribution to the disorder are presented.     

Predisposition factors in anorexia nervosa.

Since its first recognition, a number of researchers have endeavored to link anorexia nervosa to underlying pathology. For example, in the past, attempts were made to associate anorexia with such psychiatric disturbances as schizophrenia, anxiety disorders, and obsessive-compulsive and antisocial personality disorders. Most recent efforts have focused on the possible link between anorexia nervosa and affective disorders. This article reviews the literature concerned with investigating psychiatric disturbances and genetic variables hypothesized as predisposing factors in the etiology of anorexia nervosa. Particular emphasis is given to research which discusses the association between anorexia nervosa and depression. Psychopharmacological evidence and family genetics studies are reviewed. Suggestions for future research are also made.     

Perceived-competence deficit in anorexia nervosa.

Anorexia nervosa patients are portrayed as competent and accomplished and yet they feel ineffective and diffident. The assessment of this aspect of their self-esteem presents methodological problems. The Interests and Abilities Questionnaire was designed to measure interests and perceived abilities in typical adolescent activities. The disparity between interests and perceived abilities--perceived-competence deficit (PCD)--was hypothesized to be characteristic of anorexics. Three groups of females, aged 14 to 24, were studied: 13 anorexic inpatients, 13 psychiatric inpatients without an eating disorder but of similar severity of illness, and 48 nonclinical subjects. Similar to the nonclinical controls, anorexics were interested in a variety of activities; similar to control patients, anorexics rated their abilities lower than nonclinical subjects. In PCD, anorexics scored significantly higher than both control groups; this difference was not related to level of depression.     

Quantitative evidence for distinct cognitive impairment in anorexia nervosa and bulimia nervosa

It is generally agreed that at least some aspects of abnormal eating behaviour is indeed due in part to disordered cognition. The accumulated literature illustrates cognitive impairment in patients with anorexia nervosa (AN) and bulimia nervosa (BN). Yet beyond being inconsistent, these independent studies also do not reveal the magnitude of impairment within and across studies and fail to give due consideration to the magnitude of impairment so as to understand the severity and breadth of impairment and/or differences in cognitive profiles between patients with AN and BN. Hence, the present review on the subject sought to articulate the magnitude of cognitive impairment in patients with AN and BN by quantitatively synthesizing the existing literature using meta-analytic methodology. The results demonstrate modest evidence of cognitive impairment specific to AN and BN that is related to body mass index in AN in terms of its severity, and is differentially impaired between disorders. Together, these results suggest that disturbed cognition is figural in the presentation of eating disorders and may serve to play an integral role in its cause and maintenance. Implications of these findings with respects to future research are discussed.     

Adolescence, sexual conflict, and anorexia nervosa

Anorexia nervosa is a life-threatening mental disorder. As many as one out of every 250 girls between the ages of 12 and 18 may develop anorexia nervosa. The high incidence of the disorder among adolescent girls suggests that developmental sexual pressure inherent in adolescence may be associated with the onset of the disease. The symptoms of anorexia nervosa appear with the onset of puberty and the development of the secondary sex characteristics. Symptom formation is related to the following developmental issues: physiological changes (menstruation and breast development) and psychological changes (body image and sexual identity).