Executive functioning and spatial processing in anorexia nervosa: an experimental study and its significance for the...

Area of Science:

• Cognitive psychology
• Neuroscience
• Eating disorder research

Background:

• The allocentric lock theory (ALT) proposes that eating disorders stem from impaired multisensory integration in egocentric (self-centered) and allocentric (world-centered) reference frames.
• Specifically, ALT suggests egocentric processing is impaired while allocentric processing remains intact, leading to distorted body image.

Purpose of the Study:

• To investigate the visuo-spatial aspect of the ALT in individuals with anorexia nervosa (AN).
• To examine the relationship between visuo-spatial processing and cognitive flexibility in AN patients.

Main Methods:

• A case-control study involving 20 AN patients and 35 matched controls.
• Participants completed the Object Perspective Taking Test (OPTT) for egocentric processing and the Mental Rotation Test (MRT) for allocentric processing.
• A set-shifting task assessed cognitive flexibility, and the Brief Symptom Inventory measured distress.

Main Results:

• AN patients exhibited higher distress levels and poorer performance on the OPTT and set-shifting task compared to controls.
• AN patients did not show deficits in the MRT (allocentric processing).
• Correlations between OPTT and MRT were found in controls but not in AN patients. Set-shifting and BMI correlated with OPTT in AN patients.

Conclusions:

• Findings support the ALT, indicating impaired egocentric visual representations and intact allocentric visual functions in AN.
• Cognitive flexibility was associated only with the egocentric frame in AN patients.
• Deficits in egocentric processing in AN may be influenced by visual perception and cognitive flexibility.