The contents of consciousness during sleep: Some theoretical problems

The approach of Hobson et al. is limited to the description of global state s of consciousness, although more detailed analyses of the specific content s of consciousness would also be required. Furthermore, their account of th e mind-brain relationship remains obscure. Nielsen's discussion suffers fro nt conceptual and definitional unclarity. Mentation during sleep could be c larified by reconceptualizing it its all issue about the contents of consci ousness. Vertes & Eastman do not consider the types of memory (emotional) a cid learning (implicit) that are relevant during REM sleep, and therefore d ismiss on inadequate grounds the possibility of memory functions associated with REM sleep.