Visual and automatic cyclic alternating pattern (CAP) scoring

Arquivos de Neuro-Psiquiatria

Agostinho Rosa²  Gabriela Rodrigues Alves¹  Magneide Brito¹  Maria Cecília Lopes²  Sérgio Tufik¹ 

[1] ,ISR IST UTLLisboa,Portugal

关键词: cyclic alternating pattern;    CAP;    sleep;    visual scoring;    automatic scoring;    padrão alternante cíclico;    CAP;    sono;    estagiamento visual;    estagiamento automático;   

DOI  :  10.1590/S0004-282X2006000400008

来源: SciELO

【 摘 要 】

The classification of short duration events in the EEG during sleep, as the A stage of the cyclic alternating pattern (CAP) is a tedious and error prone task. The number of events under normal conditions is large (several hundreds), and it is necessary to mark the limits of the events with precision, otherwise the time sensitive classification of the CAP phases (A and B) and specially the scoring of different types of A phases will be compromised. The objective of this study is to verify the feasibility of visual CAP scoring with only one channel of EEG, the evaluation of the inter-scorer agreement in a variety of recordings, and the comparison of the visual scorings with a known automatic scoring system. Sixteen hours of one channel (C4-A1 or C3-A2) of NREM sleep were extracted from eight whole night recordings in European Data Format and presented to the different scorers. The average inter-scorer agreement for all scorers is above 70%, the pair wise inter-scorer agreement found was between 69% up to 77.5%. These values are similar to what has been reported in different type studies. The automatic scoring system has similar performance of the visual scorings. The study also has shown that it is possible to classify the CAP using only one channel of EEG.

【 授权许可】

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