Converging evidences on language impairment in Landau-Kleffner Syndrome revealed by behavioral and brain activity measures

A case study

Ferenc Honbolygó, V. Csépe, Attila Fekésházy, M. Emri, T. Márián, Gergely Sárközy, Rozália Kálmánchey

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Objective: To assess the linguistic abilities of a boy having Landau-Kleffner Syndrome, and relate the focal disturbance of brain activity due to epilepsy to the cognitive and linguistic deficits. Methods: Several kinds of assessments were carried out, including epileptic source analysis using electronic source localization methods and PET, neuropsychological assessment of cognitive functions, and assessment of speech perception skills (discrimination of phonetic and stress cues) using ERPs. Results: The source of epileptic activity was localized in the left superior temporal lobe. The neuropsychological assessment showed dissociation between verbal and nonverbal functions, and the performance in former was bellow the normal range. ERPs obtained to the processing of phonetic and stress speech cues indicated that the two cues were processed asymmetrically: the mismatch negativity component (MMN) was obtained for the phoneme difference, but not for the stress pattern difference. Conclusions: Our data converged as it showed that the patient presented a selective impairment of the language system, and the verbal working memory system appeared to be especially defective. It is suggested that the language deficit is at least partly due to the focal disturbance of those neural networks that underlie the functioning of the working memory system. Significance: LKS is a childhood language disorder that might serve as a model in studying what happens to the language system if, in the course of development, the essential neural circuits are severely disturbed.

Original languageEnglish
Pages (from-to)295-305
Number of pages11
JournalClinical Neurophysiology
Volume117
Issue number2
DOIs
Publication statusPublished - Feb 2006

Fingerprint

Landau-Kleffner Syndrome
Cues
Phonetics
Language
Linguistics
Short-Term Memory
Brain
Language Disorders
Speech Perception
Aptitude
Temporal Lobe
Cognition
Epilepsy
Reference Values

Keywords

  • Acquired aphasia
  • Childhood epilepsy
  • MMN
  • Phoneme discrimination
  • Spike-and-wave activity
  • Stress perception

ASJC Scopus subject areas

  • Clinical Neurology
  • Radiology Nuclear Medicine and imaging
  • Neurology
  • Sensory Systems
  • Physiology (medical)

Cite this

Converging evidences on language impairment in Landau-Kleffner Syndrome revealed by behavioral and brain activity measures : A case study. / Honbolygó, Ferenc; Csépe, V.; Fekésházy, Attila; Emri, M.; Márián, T.; Sárközy, Gergely; Kálmánchey, Rozália.

In: Clinical Neurophysiology, Vol. 117, No. 2, 02.2006, p. 295-305.

Research output: Contribution to journalArticle

Honbolygó, Ferenc ; Csépe, V. ; Fekésházy, Attila ; Emri, M. ; Márián, T. ; Sárközy, Gergely ; Kálmánchey, Rozália. / Converging evidences on language impairment in Landau-Kleffner Syndrome revealed by behavioral and brain activity measures : A case study. In: Clinical Neurophysiology. 2006 ; Vol. 117, No. 2. pp. 295-305.
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