Abstract：
:In this paper it is proposed to extend the classical models of sleepiness in two ways. Firstly, the role of a wake drive, besides a sleep drive, in determining sleepiness is emphasised. Although this has already been suggested in literature and convincing arguments can be found, it is not generally accepted. Secondly, we argue to incorporate trait aspects of sleepiness or a long-term person-specific level of sleepiness, besides short-term changes of sleepiness or 'state-sleepiness'. Shortly, a conceptualisation of sleepiness in which situational wake drive and sleep drive modify a basal level of both wake drive and sleep drive, is proposed. It implies that sleepiness can result from essentially different factors involved: a chronic condition or an acute state of either a high level of sleep drive, a low level of arousal or a combination of both. This is illustrated in a working model and potential assessment tools for the wake drive and state versus trait sleepiness are discussed.
journal_name
Med Hypothesesjournal_title
Medical hypothesesauthors
De Valck E,Cluydts Rdoi
10.1016/s0306-9877(02)00444-9keywords:
subject
Has Abstractpub_date
2003-04-01 00:00:00pages
509-12issue
4eissn
0306-9877issn
1532-2777pii
S0306987702004449journal_volume
60pub_type
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