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Body image disturbance
Body image disturbance (BID) is a common symptom in patients with eating disorders and is characterized by an altered perception of one's own body.
The onset is mainly attributed to patients with anorexia nervosa who persistently tend to subjectively discern themselves as average or overweight despite adequate, clinical grounds for a classification of being considerably or severely underweight. The symptom is an altered perception of one's body and a severe state of bodily dissatisfaction characterizing the body image disturbance. It is included among the diagnostic criteria for anorexia nervosa in DSM-5 (criterion C).
The disturbance is associated with significant bodily dissatisfaction and is a source of severe distress, often persisting even after seeking treatment for an eating disorder, and is regarded as difficult to treat. Thus, effective body image interventions could improve the prognosis of patients with ED, as experts have suggested. However, there is no hard evidence that current treatments for body image disturbance effectively reduce eating disorder symptoms. Furthermore, pharmacotherapy is ineffective in reducing body misperception and it has been used to focus on correlated psychopathology (e.g., mood or anxiety disorders). However, to date, research and clinicians are developing new therapies such as virtual reality experiences, mirror exposure, or multisensory integration body techniques, which have shown some extent of efficacy.
The scientific study of bodily experiences began at the end of the 19th century. German physiologist Hermann Munk was the first to suggest the existence of a cortical representation of the body, supported by his vivisection experiments on the parietal cortex of dogs. A few years later, Carl Wernicke hypothesized a cortical map capable of collecting and processing sensory inputs from every point of the body. In 1905 Bonnier introduced the term body schema, defining it as the mental representation of the body necessary for the brain to perceive objects near, far, or within the body itself.
Bonnier also described three different partial body pattern alterations, hyperschématie (French; 'an overestimation of body size'), hyposchématie ('an underestimation of body size'), and paraschématie ('a displacement of body parts including internal organs'). Head and Holmes in 1911 expanded the concept of a body schema, introducing the concepts of postural schema and surface schema. They described a patient who could locate the stimuli applied to her body but could not locate her hand in space. They also defined the difference between schema and image. The schema defined as an unconscious representation necessary for movement and localization in space, and the "image" as a conscious body perception.
Therefore, in the history of medicine, distortions in the perception of one's body have mainly occurred in patients with neurological damage or with amputated limbs and a consequence of phantom limb syndrome. In the psychiatric field, the first systematic descriptions of bodily altered perception are already present in Schneider's classification of symptoms of schizophrenia in 1959. The German-American psychiatrist Hilde Bruch was the first physician to describe body image disturbance in eating disorders accurately.
Hilde Bruch first identified and described body image disturbance in anorexia nervosa. In her article "Perceptual and Conceptual Disturbances in Anorexia Nervosa" she wrote:
What is pathognomic of anorexia is not the severity of the malnutrition per se—equally severe degrees are seen in other malnourished psychiatric patients—but rather the distortion of body image associated with it: the absence of concern about emaciation, even when advanced, and the vigor and stubbornness with which the often gruesome appearance is defended as normal and right, not too thin, and as the only possible security against the dreaded fate of becoming fat.
Body image disturbance
Body image disturbance (BID) is a common symptom in patients with eating disorders and is characterized by an altered perception of one's own body.
The onset is mainly attributed to patients with anorexia nervosa who persistently tend to subjectively discern themselves as average or overweight despite adequate, clinical grounds for a classification of being considerably or severely underweight. The symptom is an altered perception of one's body and a severe state of bodily dissatisfaction characterizing the body image disturbance. It is included among the diagnostic criteria for anorexia nervosa in DSM-5 (criterion C).
The disturbance is associated with significant bodily dissatisfaction and is a source of severe distress, often persisting even after seeking treatment for an eating disorder, and is regarded as difficult to treat. Thus, effective body image interventions could improve the prognosis of patients with ED, as experts have suggested. However, there is no hard evidence that current treatments for body image disturbance effectively reduce eating disorder symptoms. Furthermore, pharmacotherapy is ineffective in reducing body misperception and it has been used to focus on correlated psychopathology (e.g., mood or anxiety disorders). However, to date, research and clinicians are developing new therapies such as virtual reality experiences, mirror exposure, or multisensory integration body techniques, which have shown some extent of efficacy.
The scientific study of bodily experiences began at the end of the 19th century. German physiologist Hermann Munk was the first to suggest the existence of a cortical representation of the body, supported by his vivisection experiments on the parietal cortex of dogs. A few years later, Carl Wernicke hypothesized a cortical map capable of collecting and processing sensory inputs from every point of the body. In 1905 Bonnier introduced the term body schema, defining it as the mental representation of the body necessary for the brain to perceive objects near, far, or within the body itself.
Bonnier also described three different partial body pattern alterations, hyperschématie (French; 'an overestimation of body size'), hyposchématie ('an underestimation of body size'), and paraschématie ('a displacement of body parts including internal organs'). Head and Holmes in 1911 expanded the concept of a body schema, introducing the concepts of postural schema and surface schema. They described a patient who could locate the stimuli applied to her body but could not locate her hand in space. They also defined the difference between schema and image. The schema defined as an unconscious representation necessary for movement and localization in space, and the "image" as a conscious body perception.
Therefore, in the history of medicine, distortions in the perception of one's body have mainly occurred in patients with neurological damage or with amputated limbs and a consequence of phantom limb syndrome. In the psychiatric field, the first systematic descriptions of bodily altered perception are already present in Schneider's classification of symptoms of schizophrenia in 1959. The German-American psychiatrist Hilde Bruch was the first physician to describe body image disturbance in eating disorders accurately.
Hilde Bruch first identified and described body image disturbance in anorexia nervosa. In her article "Perceptual and Conceptual Disturbances in Anorexia Nervosa" she wrote:
What is pathognomic of anorexia is not the severity of the malnutrition per se—equally severe degrees are seen in other malnourished psychiatric patients—but rather the distortion of body image associated with it: the absence of concern about emaciation, even when advanced, and the vigor and stubbornness with which the often gruesome appearance is defended as normal and right, not too thin, and as the only possible security against the dreaded fate of becoming fat.