To save content items to your account,
please confirm that you agree to abide by our usage policies.
If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account.
Find out more about saving content to .
To save content items to your Kindle, first ensure email@example.com
is added to your Approved Personal Document E-mail List under your Personal Document Settings
on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part
of your Kindle email address below.
Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations.
‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi.
‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
The central research topic of this chapter is embedded within three major fields of research, that is, sleep, memory, and cognitive aging research. Sleep is further characterized by changes in cerebral activity across the sleep-wake cycle. At a global level, brain activity decreases from waking to non-REM (NREM) sleep and returns back to waking levels during rapid eye movement (REM) sleep. Like sleep, memory is not a unitary system. In fact, there are several different classification schemes for human memory. In the context of sleep-dependent memory consolidation, an important distinction is usually drawn between declarative and non-declarative memory systems. Age-related cognitive decline is characterized by healthy and pathological processes in adult brain development. In this context, an important distinction is drawn between normal aging, mild cognitive impairment (MCI), and Alzheimer's disease (AD). Several psychiatric disorders such as Alzheimer's disease and depression are associated with disturbances of both sleep and memory.