www.mamboteam.com
Hypersomnie idiopathique, hypersomnies centrales primaires et secondaires; somnolence, fatigue et sommeil  
Accueil arrow Narcolepsie avec cataplexie arrow Recherches passées arrow 2008 Saletu M
24-05-2017
 
 
Menu principal
Accueil
Le sommeil
Hypersomnie idiopathique
Hypersomnies secondaires
Narcolepsie avec cataplexie
Thèse de Neurosciences
Liens
Plan de Hypersomnies.fr


Image Exemple



2008 Saletu M Convertir en PDF 

 Event-related-potential low-resolution brain electromagnetic tomography (ERP-LORETA) suggests decreased energetic resources for cognitive processing in narcolepsy.

 

Saletu M, Anderer P, Saletu-Zyhlarz GM, Mandl M, Zeitlhofer J, Saletu B.
Event-related-potential low-resolution brain electromagnetic tomography (ERP-LORETA) suggests decreased energetic resources for cognitive processing in narcolepsy.
Clin Neurophysiol. 2008 Aug;119(8):1782-94. Epub 2008 Jun 20.

 

    Résumé en anglais

 

OBJECTIVE: Event-related potentials (ERPs) are sensitive measures of both perceptual and cognitive processes. The aim of the present study was to identify brain regions involved in the processes of cognitive dysfunction in narcolepsy by means of ERP tomography.

METHODS: In 17 drug-free patients with narcolepsy and 17 controls, ERPs were recorded (auditory odd-ball paradigm). Latencies, amplitudes and LORETA sources were determined for standard (N1 and P2) and target (N2 and P300) ERP components. Psychometry included measures of mental performance, affect and critical flicker fusion frequency (CFF).

RESULTS: In the ERPs patients demonstrated delayed cognitive N2 and P300 components and reduced amplitudes in midline regions, while N1 and P2 components did not differ from controls. LORETA suggested reduced P300 sources bilaterally in the precuneus, the anterior and posterior cingulate gyri, the ventrolateral prefrontal cortex and the parahippocampal gyrus. In psychometry, patients demonstrated deteriorated mood, increased trait anxiety, decreased CFF and a trend toward reduced general verbal memory and psychomotor activity.

CONCLUSIONS: Narcoleptic patients showed prolonged information processing, as indexed by N2 and P300 latencies and decreased energetic resources for cognitive processing.

SIGNIFICANCE: Electrophysiological aberrations in brain areas related to the 'executive attention network' and the 'limbic system' may contribute to a deterioration in mental performance and mood at the behavioral level.

 
< Précédent   Suivant >
 
Top! Top!