Right anterior temporal lobe atrophy and person-based semantic defect: a detailed case study

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A Comprehensive Protocol for Manual Segmentation of the Medial Temporal Lobe Structures
12:30

A Comprehensive Protocol for Manual Segmentation of the Medial Temporal Lobe Structures

Published on: July 2, 2014

Thomas Busigny1, Laurence Robaye, Laurence Dricot

  • 1Université Catholique de Louvain (UCL), Faculté de Psychologie et des Sciences de l'Education (PSP), Unité de Cognition et Développement (CODE), Place du Cardinal Mercier, 10, B-1348 Louvain-la-Neuve, Belgium. thomas.busigny@uclouvain.be

Neurocase
|July 2, 2009
PubMed

Insights

This study details a rare frontotemporal dementia variant (Rtv-FTLD) causing progressive loss of person recognition. Despite deficits in semantic memory, core face perception abilities remained intact.

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neurology

Background:

  • Frontotemporal dementia (FTD) encompasses several neurodegenerative disorders.
  • Right temporal pole variant of FTD (Rtv-FTLD) is a less common subtype.
  • Impaired recognition of familiar individuals is a key symptom.

Observation:

  • A patient (MD) with Rtv-FTLD exhibited progressive difficulty recognizing familiar and famous people.
  • Comprehensive cognitive assessments evaluated face processing and semantic memory.
  • Neuroimaging was employed to investigate brain activity and structure.

Findings:

  • The patient displayed a cross-modal deficit specific to person-based information.
  • Broader semantic memory alterations were also identified.
  • Crucially, basic face perception and holistic processing remained unimpaired.
  • No abnormal activation was observed in canonical face-processing brain regions.

Implications:

  • This case sheds light on the specific neural underpinnings of person recognition deficits in Rtv-FTLD.
  • It suggests a dissociation between person-specific semantic knowledge and general face perception mechanisms.
  • Understanding these distinctions is vital for diagnosing and managing FTD subtypes.

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