Knowra Anorexia nervosa Anorexia nervosa Anorexia nervosa is an eating disorder marked by restricted energy intake, fear of weight gain or persistent weight-preventing behavior, and disturbed body image. It can cause severe medical complications and occurs across body sizes.
Energy homeostasis : The regulation of energy intake, storage, and expenditure to maintain bodily functions. Restriction disrupts energy balance and prompts bodily adaptations that can reinforce illness.
DSM-5-TR : The American Psychiatric Association's diagnostic manual for mental disorders, revised in 2022. Its criteria define anorexia nervosa in current US psychiatric practice.
Atypical anorexia nervosa : An eating disorder meeting anorexia nervosa criteria except that body weight is not significantly low. It shares core symptoms and medical risks while lacking the low-weight criterion.
Bradycardia : A slower-than-normal heart rate, which can result from illness, medication, or athletic conditioning. Severe energy restriction can slow the heart and require urgent medical assessment.
Anorexia nervosa genetics : Research into genetic contributions to risk for anorexia nervosa and related traits. Genetic studies suggest risk involves both psychiatric and metabolic biology.
Starvation response : The physiological and psychological changes that occur when the body receives too little energy over time. Prolonged restriction can alter mood, concentration, and physical functioning, deepening the cycle.
ICD-11 : The World Health Organization's international classification of diseases, in force since 2022. It provides an international diagnostic framework for anorexia nervosa.
Bulimia nervosa : An eating disorder involving recurrent binge eating and compensatory behaviors, without anorexia nervosa's low-weight requirement. Both can involve weight-related fear and restriction, but recurrent binge-purge patterns distinguish bulimia.
Osteoporosis : A disease in which reduced bone strength increases the risk of fractures. Low energy availability and hormonal changes can impair bone formation and density.
Neurobiology of anorexia nervosa : The study of brain and nervous-system processes associated with anorexia nervosa. It investigates how reward, threat, and cognitive-control systems relate to symptoms.
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