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The diversity of fishes provides a wealth of morphological variety to investigate at the developmental and genetic level. The diverse range of phenotypes offered by fish dentitions provides an excellent comparative context for studies of evolutionary developmental biology. This chapter discusses the evolution, development and regenerative capacity of chondrichthyan and osteichthyan dentitions. We provide an overview of the recent insights into how general fish dentitions are initiated and how they continue to redevelop over multiple tooth generations.
Poor sleep is a risk factor for depression, but little is known about the underlying mechanisms.
Aims
Disentangling potential mechanisms by which sleep may be related to depression by zooming downto the ‘micro-level’ of within-person daily life patterns of subjective sleep and affect usingthe experience sampling method (ESM).
Method
A population-based twin sample consisting of 553 women underwent a 5-day baseline ESM protocolassessing subjective sleep and affect together with four follow-up assessments of depression.
Results
Sleep was associated with affect during the next day, especially positive affect. Daytime negative affect was not associated with subsequent night-time sleep. Baseline sleep predicted depressive symptoms across the follow-up period.
Conclusions
The subtle, repetitive impact of sleep on affect on a daily basis, rather than the subtle repetitive impact of affect on sleep, may be one of the factors on the pathway to depression in women.
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