Tag Archives: sleep

Napping, releasing the soul and brain maintenance

Decorative photograph of painting: The Punishment of Lust.I read recently about the renovation of a small Parisian flat into a single office for the writer, Simon Kuper (How I made my perfect office).  The furniture included a sofa by the window for his post-lunch 15-minute nap (20 minutes on a bad day).  There was a brief period when I regularly had a nap in my office in the middle of day.  Now, I regularly nap at the weekend in the afternoon, or a weekday in the early evening after dinner.  Research has found short daytime naps improve cognitive performance (Lovato & Lin, 2010) and may help to preserve brain health by slowing the rate at which the brain shrinks with age (Paz et al, 2023).  So, short naps are probably good for you, though longer naps have been associated with reductions in cognition, the ability to think and form memories (Li et al, 2016) as well as increased blood pressure (Vizmanos et al, 2023).  In his outstanding novel, ‘The Salt of the Earth‘, Jozef Wittlin describes sleep as releasing or giving freedom to the soul.  Perhaps it is the wandering of the soul that we sometime recall as dreams.  On a more sinister note, sleep is described as practice for death by Ernesto Sabato in his novel, ‘On Heroes and Tombs‘, when presumably our soul is released forever to drift to Nirvana as in Giovanni Segantini’s painting ‘The punishment of lust’ in which the souls of neglectful mothers are shown floating towards the mountains representing Nirvana, a Buddhist heaven.  In the light of the inevitability of death, I quite like the idea that we can practice for it; however, I prefer to think of naps preserving my aging brain and improving my cognition.

Image: photograph of ‘The punishment of lust’ by Giovanni Segantini in the Walker Gallery, Liverpool.

Sleep reinforces connections

alarm clockFor many students this is examination season and the temptation to study twenty-four hours a day is high.  However, recently reported research has implied that an extra three to four hours of sleep over as little as two days can restore memories.  This implies that a good strategy for exam preparation is to reduce revision in the 48 hours before an exam and sleep instead.

Researchers report that sleep helps the brain to reinforce connections between brain cells, which encode important memories, and to remove connections associated with useless information. Of course from an exam preparation perspective, this does imply that you need to have been studying during the course and hence have memories to reinforce. If you haven’t then stop reading this blog and carry on revising –  if necessary, all night!

For the older folks amongst my readers who sometimes feel they are suffering from early onset Alzheimer’s, having an early night or a late morning lie-in might really restore memories.

Sources:

The Hindu, Saturday 25th April, 2015, page 12

Keene AC & Joiner WJ, Neurodegeneration: Paying it off with sleep, Current Biology, 25(6):R234-236, 2015