Format

Send to:

Choose Destination
See comment in PubMed Commons below
J AAPOS. 2010 Aug;14(4):317-22. doi: 10.1016/j.jaapos.2010.03.007. Epub 2010 Jul 3.

Functional magnetic resonance imaging of a child with Alice in Wonderland syndrome during an episode of micropsia.

Author information

  • 1Joint Doctoral Program in Language and Communicative Disorders, San Diego State University/University of California-San Diego, 5500 Campanile Drive, San Diego, CA 92182-1518, USA.

Abstract

BACKGROUND:

Alice in Wonderland syndrome is a perceptual disorder involving brief, transient episodes of visual distortions (metamorphopsia) and can occur in conjunction with certain viral infections. We used functional magnetic resonance imaging to examine visual processing in a 12-year-old boy with viral-onset Alice in Wonderland syndrome during an episode of micropsia (reduction in the perceived size of a form).

METHODS:

Functional magnetic resonance imaging was conducted in response to a passive viewing task (reversing checkerboard) and an active viewing task (line-length decisions in the context of the Ponzo illusion).

RESULTS:

In both tasks, the child with Alice in Wonderland syndrome showed reduced activation in primary and extrastriate visual cortical regions but increased activation in parietal lobe cortical regions as compared with a matched control participant.

CONCLUSIONS:

The active experience of micropsia in viral-onset Alice in Wonderland syndrome reflects aberrant activity in primary and extrastriate visual cortical regions as well as parietal cortices. The disparate patterns of activity in these regions are discussed in detail.

Published by Mosby, Inc.

PMID:
20598927
[PubMed - indexed for MEDLINE]
PMCID:
PMC2928409
Free PMC Article
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science Icon for PubMed Central
    Loading ...
    Write to the Help Desk