http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Until relatively recently what happens while we sleep was a mystery. But that changed with the advent of polysomnography, the electrical recording of brain activity. This short film provides students with a clear visual introduction to the stages of sleep. It also shows why we can't fully understand our waking lives without understanding how sleep works.
Title from resource description page (viewed December 07, 2018).
Presenter: Gareth Gaskell, with Steve Taylor.