Abstract
The right temporal variant of frontotemporal lobar degeneration (Rtv-FTLD) is a focal degenerative condition affecting predominantly the right temporal lobe. The aim of this study was to further characterize the profile of cognitive impairment and the neuroanatomical basis of Rtv-FTLD patients without behavioural disturbances. A group of three patients with this syndrome had a detailed neuropsychological assessment, along with Voxel-Based Morphometry (VBM) of their brain to determine location of cortical atrophy. VBM analyses showed a pattern of atrophy that was predominant in the right hemisphere and concerned primarily the right anterior temporal lobe region. Patients carried out a test of famous people in which their ability to recognize, name and provide semantic information about famous persons from their faces, their voices and their names was investigated. They all showed a severe defect in recognizing, naming and identifying famous people irrespective of modality. Therefore, their inability to recognize famous people resulted from a multimodal defect (semantic). These results highlight the semantic nature of the defect, and suggest that the anterior right temporal lobe may have a prominent role in processing person-based semantic knowledge. This study helps in further understanding the neuropsychological profile of patients with Rtv-FTLD.
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Abbreviations
- Rtv-FTLD::
-
Right temporal variant frontotemporal lobar degeneration
- MMSE::
-
Mini-Mental State Examination
- SD::
-
Semantic dementia
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Acknowledgements
We are grateful CM, FC and FG who kindly contributed to this study and would like to thank them for their longstanding enthusiasm and cooperation. We are also grateful to Nathalie Walker for helpful comments.
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Received in revised form: 14 March 2006
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Joubert, S., Felician, O., Barbeau, E. et al. The right temporal lobe variant of frontotemporal dementia. J Neurol 253, 1447–1458 (2006). https://doi.org/10.1007/s00415-006-0232-x
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DOI: https://doi.org/10.1007/s00415-006-0232-x