Anticipation of body-scaled action is modified in anorexia nervosa

▶ Anticipation of action (passability through an aperture) is disturbed in anorexic patients. ▶ Abnormally high “passability ratio” (critical aperture size to shoulder width ratio) is found. ▶ This ratio is correlated with the duration of illness and the degree of body concern/dissatisfaction. ▶ Body size overestimation also relies on impaired neural processing of body dimensions (body schema). ▶ This might take its source in parietal networks.