The co-morbidity of eating disorders and anxiety disorders: a review

The effect of posttraumatic stress disorder on risk-taking propensity among crack/cocaine users in residential substance abuse treatment

BACKGROUND

The co-occurrence of posttraumatic stress disorder (PTSD) and substance use disorders (SUDs) has been found to be associated with a range of negative clinical outcomes (e.g., relapse, suicide, legal problems, HIV infection). However, less is known about the particular factors that may be placing individuals with a co-occurring PTSD and SUD diagnosis at risk for these outcomes. The construct of risk-taking propensity may hold particular promise.

METHODS

To investigate the relevance of risk-taking propensity to PTSD-SUD patients, differences in risk-taking propensity were examined among 90 crack/cocaine dependent patients in residential substance abuse treatment with (n=20) or without (n=70) a current PTSD diagnosis. Risk-taking propensity was assessed using an established behaviorally based measure, the Balloon Analogue Risk Task (BART).

RESULTS

Crack/cocaine dependent patients with PTSD exhibited significantly greater levels of risk-taking propensity than patients without PTSD, and this difference remained significant even when controlling for the presence of comorbid psychiatric disorders and current psychotropic medication use. No evidence was found for a different pattern of change in risk-taking propensity from the beginning to the end of the task as a function of PTSD status.

CONCLUSIONS

Although preliminary, results suggest the need to further investigate risk-taking propensity as a factor that may be associated with the negative clinical outcomes observed among crack/cocaine users with PTSD.

Adolescent eating disorders: definitions, symptomatology, epidemiology and comorbidity

Eating disorders have morbidity and mortality rates that are among the highest of any mental disorders and are associated with significant functional impairment. This article provides an up-to-date review on recent developments and expanding knowledge in adolescent anorexia nervosa, bulimia nervosa, and related disorders. It covers diagnoses and assessment, recognition of typical symptoms, medical and psychiatric comorbidities, and current trends in epidemiology.

Neuropsychologische Befunde bei Anorexia und Bulimia nervosa im Kindes- und Jugendalter

Zusammenfassung: Anorexia und Bulimia nervosa sind häufige psychiatrische Erkrankungen des Kindes- und Jugendalters, die insbesondere Mädchen betreffen. Im Akutzustand der Starvation treten bei Essstörungen eine Vielzahl von hormonellen, neuropsychologischen und hirnmorphologischen Veränderungen auf, von denen einige nur teilweise reversibel sind. Komorbide psychiatrische Erkrankungen verkomplizieren das Krankheitsbild und erschweren adäquate therapeutische Interventionen. Der folgende Artikel setzt sich ausführlich mit den neuropsychologischen Defiziten bei Essstörungen, möglichen Einflussfaktoren auf die kognitive Leistungsfähigkeit und daraus resultierenden Implikationen für den klinischen Alltag auseinander.

Behavioral neuroendocrinology and treatment of anorexia nervosa

Outcome in anorexia nervosa remains poor and a new way of looking at this condition is therefore needed. To this aim, we review the effects of food restriction and starvation in humans. It is suggested that body weight remains stable and relatively low when the access to food requires a considerable amount of physical activity. In this condition, the human homeostatic phenotype, body fat content is also low and as a consequence, the synthesis and release of brain neurotransmitters are modified. As an example, the role of neuropeptide Y is analyzed in rat models of this state. It is suggested that the normal behavioral role of neuropeptide Y is to facilitate the search for food and switch attention from sexual stimuli to food. Descriptive neuroendocrine studies on patients with anorexia nervosa have not contributed to the management of the patients and the few studies in which hormones have been administered have, at best, reversed an endocrine consequence secondary to starvation. In a modified framework for understanding the etiology and treatment of anorexia nervosa it is suggested that the condition emerges because neural mechanisms of reward and attention are engaged. The neural neuropeptide Y receptor system may be involved in the maintenance of the behavior of eating disorder patients because the localization of these receptors overlaps with the neural systems engaged in cue-conditioned eating in limbic and cortical areas. The eating behavior of patients with anorexia nervosa, and other eating disorders as well, is viewed as a cause of the psychological changes of the patients. Patients are trained to re-learn normal eating habits using external support and as they do, their symptoms, including the psychological symptoms, dissolve.