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Clinical Neurophysiology 2010-Nov

The EEG response to photic stimulation is not increased in alcohol-related seizures.

Ní féidir ach le húsáideoirí cláraithe ailt a aistriú
Logáil Isteach / Cláraigh
Sábháiltear an nasc chuig an gearrthaisce
Trond Sand
Marte Bjørk
Geir Bråthen
Eylert Brodtkorb
Ralf Peter Michler
Gunnar Bovim

Keywords

Coimriú

OBJECTIVE

To investigate the occipital EEG response to 18 and 24Hz photic stimulation (the H-response) in alcohol-related seizures (ARS).

METHODS

Twenty-two ARS patients, 15 of whom had a withdrawal seizure (WS) were compared with patients with recent seizures of other causes: 21 patients with epilepsy, and 30 Alcohol Use Disorders Identification Test (AUDIT) negative patients with other seizures. EEG from 37 out-patients with epilepsy and 79 sciatica patents served as patient-controls. The spectral amplitude around 18 and 24Hz and a new photic H-ratio (24/18Hz relative amplitude) was calculated.

RESULTS

The H-ratio was significantly reduced in the ARS group compared to the sciatica group. H-ratio reduction correlated with the AUDIT score in ARS patients (p=0.02). No differences between WS and non-WS patients were found for H-response variables.

CONCLUSIONS

A dose-response relationship between AUDIT and the photic response H-ratio was observed in ARS patients. The EEG-driving response to 24Hz flashes was not increased in ARS.

CONCLUSIONS

The relative decrease in 24Hz photic response in ARS reflected drinking severity. The H-ratio is a candidate biomarker for ARS on the group level, although the moderate effect size precludes its use in individual patients.

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