title: Hypothalamic BOLD response to glucose intake and hypothalamic volume are similar in anorexia nervosa and healthy control subjects.
abstract: BACKGROUND
  Inconsistent findings about the neurobiology of Anorexia Nervosa (AN) hinder the development of effective treatments for this severe mental disorder. Therefore, the need arises for elucidation of neurobiological factors involved in the pathophysiology of AN. The hypothalamus plays a key role in the neurobiological processes that govern food intake and energy homeostasis, processes that are disturbed in anorexia nervosa (AN). The present study will assess the hypothalamic response to energy intake and the hypothalamic structure in patients with AN and healthy controls.
  
  
  METHODS
  Ten women aged 18-30 years diagnosed with AN and 11 healthy, lean (BMI < 23 kg/m(2)) women in the same age range were recruited. We used functional magnetic resonance imaging (MRI) to determine function of the hypothalamus in response to glucose. Structural MRI was used to determine differences in hypothalamic volume and local gray matter volume using manual segmentation and voxel-based morphometry.
  
  
  RESULTS
  No differences were found in hypothalamic volume and neuronal activity in response to a glucose load between the patients and controls. Whole brain structural analysis showed a significant decrease in gray matter volume in the cingulate cortex in the AN patients, bilaterally.
  
  
  CONCLUSIONS
  We argue that in spite of various known changes in the hypothalamus the direct hypothalamic response to glucose intake is similar in AN patients and healthy controls.
authors.affiliation: Department of Radiology, Leiden University Medical Center Leiden, Netherlands.
authors.forename: Anna M
authors.initials: AM
authors.lastname: van Opstal
authors.affiliation: Department of Radiology, Leiden University Medical Center Leiden, Netherlands.
authors.forename: Anna M
authors.initials: AM
authors.lastname: Westerink
authors.affiliation: Department of Radiology, Leiden University Medical Center Leiden, Netherlands.
authors.forename: Wouter M
authors.initials: WM
authors.lastname: Teeuwisse
authors.affiliation: Center for Eating Disorders Ursula, Rivierduinen Leiden, Netherlands.
authors.forename: Mirjam A M
authors.initials: MA
authors.lastname: van der Geest
authors.affiliation: Center for Eating Disorders Ursula, Rivierduinen Leiden, Netherlands ; Department of Psychiatry, Leiden University Medical Center Leiden, Netherlands.
authors.forename: Eric F
authors.initials: EF
authors.lastname: van Furth
authors.affiliation: Department of Radiology, Leiden University Medical Center Leiden, Netherlands.
authors.forename: Jeroen
authors.initials: J
authors.lastname: van der Grond
keywords: anorexia nervosa; case control study; functional MRI; glucose sensing; hypothalamus; voxel based morphomerty