Neuroanatomy of a neurobehavioral disturbance in the left anterior thalamic infarction

Yoshiyuki Nishio, Mamoru Hashimoto, Kazunari Ishii, Etsuro Mori

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

Background and purpose: Cognitive and behavioural symptoms represent primary clinical manifestations of anterior thalamic infarcts (ATIs) in the tuberothalamic artery territory. The aim of the study is to understand the pathomechanism of cognitive and behavioural disturbances in left ATI (LATI). Methods: 6 patients with isolated LATIs were investigated using neuropsychological assessments, MRI stereotactic lesion localisation and positron emission tomography. Results: The patients were characterised clinically by verbal memory impairment, language disturbances dominated by anomia and word-finding difficulty and apathy. The ventral anterior nucleus (VA) proper, magnocellular VA (VAmc), ventral lateral anterior nucleus (VLa), ventral lateral posterior nucleus (VLp) and mammillothalamic tract were involved in all patients. Compared with healthy controls, the regional cerebral blood flow was lower in the thalamus, the dorsolateral, medial and orbital frontal lobes, the anterior temporal lobe, the inferior parietal lobule and the occipital lobe of the left hemisphere. Conclusions: The authors propose that the Papez circuit disruption at the mammillothalamic tract and possibly thalamomedial temporal disconnection at the VA region is responsible for memory impairment and that the thalamo-anterior temporal disconnection is associated with language disturbance in LATI, respectively.

Original languageEnglish
Pages (from-to)1195-1200
Number of pages6
JournalJournal of Neurology, Neurosurgery and Psychiatry
Volume82
Issue number11
DOIs
Publication statusPublished - 2011 Nov

ASJC Scopus subject areas

  • Surgery
  • Clinical Neurology
  • Psychiatry and Mental health

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