J Clin Neurol.  2007 Sep;3(3):161-164. 10.3988/jcn.2007.3.3.161.

Bilateral Ageusia in a Patient with a Left Ventroposteromedial Thalamic Infarct: Cortical Localization of Taste Sensation by Statistical Parametric Mapping Analysis of PET Images

Affiliations
  • 1Department of Neurology, Konyang University College of Medicine, Daejeon, Korea.
  • 2Department of Neurology, Ewha Womans University, School of Medicine, Seoul, Korea. jjeong@ewha.ac.kr
  • 3Department of Neurology, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Korea.

Abstract

Unilateral taste loss is usually observed on the side contralateral to a thalamic infarction, despite gustatory function being represented bilaterally. We report a rare case of bilateral taste loss in a patient with an acute left unilateral thalamic infarction, with unilateral left insular hypometabolism demonstrated by statistical parametric map analysis of PET images. Our observations suggest that the left insular cortex and left ventroposteromedial thalamic nuclei are critical to bilateral gustatory sensation.

Keyword

Unilateral thalamic stroke; Bilateral taste loss; PET
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