sleep defn

science of sleep

[notes on this article on second reading below]


Big Think (@bigthink) tweeted at 6:13 AM – 17 Oct 2017 :

Early Research Suggests Sleep Disorders May Be Caused by Your Muscles, Not Your Brain: (

when body says no

embodiment et al


How lack of sleep affects health and tips for a good night’s rest



zeynep tufekci (@zeynep) tweeted at 6:16 AM – 27 Nov 2017 :

Sleep as consolidation, sleep as creation. “This substantial variability is not consistent with the idea that night-time activity replays day-time experiences for consolidation.” (

Adult zebra finches rehearse highly variable song patterns during sleep

Brain activity during sleep is fairly ubiquitous and the best studied possible function is a role in memory consolidation, including motor memory. One suggested mechanism of how neural activity effects these benefits is through reactivation of neurons in patterns resembling those of the preceding experience. The specific patterns of motor activation replayed during sleep are largely unknown for any system.

We show that male zebra finches (Taeniopygia guttata) frequently exhibit spontaneous song-like activity during the night, but that the fictive song patterns are highly variable and uncoordinated compared to the highly stereotyped day-time song production. This substantial variability is not consistent with the idea that night-time activity replays day-time experiences for consolidation. Although the function of this frequent activation is unknown, it may represent a mechanism for exploring motor space or serve to generate internal error signals that help maintain the high stereotypy of day-time song. In any case, the described activity supports the emerging insight that brain activity during sleep may serve a variety of functions.


brain benefits of deep sleep


sound (sounds like deep/fastish breathing) that makes delta waves (of deep sleep) occur during sleep


World Economic Forum (@wef) tweeted at 2:30 PM – 20 Feb 2018 :

Fitbit analyzed data on 6 billion nights of sleep – with fascinating results #sleep (


from Krishnamurti‘s total freedom


if you are totally aware during the day of all the mechanical movement, the ways of your thinking, desire, then you will find at night when you go to sleep, in spite of what all the scientists say, there are no dreams.. the mind the brain is quiet because all your problems, all your activities have been dissolved during the day, if you are attentive, are watchful, aware..  then when you go to sleep there is peace..  a quiet movement.. not agitated, anxious..  therefore, the brain brings order in itself, so the brain becomes young, fresh.. it cannot be young/fresh and decisive if there is any form of hurt..  when it sees hurt the brain has no resistance


Yaneer Bar-Yam (@yaneerbaryam) tweeted at 5:14 AM – 27 Jul 2018 :
Sleep deprivation shows that sleep is important. My discussion is in Chapter 3 of Dynamics of Complex Systems online at (

3.1 ff


via indy johar rt:

Hettie O’Brien (@hettieveronica) tweeted at 3:45 AM – 30 May 2019 :
this week I wrote about how the sleep industry individualises a social problem, and why we should stop tracking sleep and start politicising exhaustion (

Society’s approach to sleep precludes (prevents) the possibility that exhaustion could have an economic cause. Framing sleep as a biological issue, or an individual problem of excessive screen time, has enormous benefits for capitalism. It provides a lucrative market for companies to make money from time that was once uncolonised, offering an array of expensive cures: the perfect mattress, an Oura Ring, a body-clock light. Our sleep readings point to an epidemic of exhaustion, but offer little by way of an explanation. In an age of intensified work, it’s time to stop tracking sleep, and start politicising exhaustion.


Austin Kleon (@austinkleon) tweeted at 5:38 AM – 10 Jul 2019 :

Again, what’s good for kids is good for adults. Most kids (including mine) are chronically underslept. (We’ve been pretty fanatical about bedtime from the beginning.) (

‘fanatical about bedtime’ – part of the problem [like in keep going on routine/imprisonment ‘if it’s your own making’ can set you free]

imagining what we could see/become if we would listen deeper to their (infants) not yet scrambled ness ie: why/when they sleep.. don’t/can’t sleep

segmented sleepperry sleep alone law; peter on sleep; et al


the 24 hr mind – rosalind cartwright- the science of sleep via maria:

The more severe the depression, the earlier the first REM begins..This early REM displaces the initial deep sleep, which is not fully recovered later in the night.. related to physical repair. If we do not get enough deep sleep, our bodies take longer to heal and grow. The absence of the large spurt of HGH during the first deep sleep continues in many depressed patients even when they are no longer depressed (in remission).

What is carried forward from waking hours into sleep are recent experiences that have an emotional component, often those that were negative in tone but not noticed at the time or not fully resolved. One proposed purpose of dreaming, of what dreaming accomplishes (known as the mood regulatory function of dreams theory) is that dreaming modulates disturbances in emotion, regulating those that are troublesome. . Studies show that negative mood is down-regulated overnight.. How this is accomplished has had less attention.

I propose that when some disturbing waking experience is reactivated in sleep and carried forward into REM, where it is matched by similarity in feeling to earlier memories, a network of older associations is stimulated and is displayed as a sequence of compound images that we experience as dreams. This melding of new and old memory fragments modifies the network of emotional self-defining memories, and thus updates the organizational picture we hold of ‘who I am and what is good for me and what is not.’ In this way, dreaming diffuses the emotional charge of the event and so prepares the sleeper to wake ready to see things in a more positive light, to make a fresh start.

This does not always happen over a single night; sometimes a big reorganization of the emotional perspective of our self-concept must be made — from wife to widow or married to single, say, and this may take many nights. We must look for dream changes within the night and over time across nights to detect whether a productive change is under way. In very broad strokes, this is the definition of the mood-regulatory function of dreaming, one basic to the new model of the twenty-four hour mind I am proposing.

art and sleep as reset.. to fittingness

Sleep is a busy time, interweaving streams of thought with emotional values attached, as they fit or challenge the organizational structure that represents our identity. One function of all this action, I believe, is to regulate disturbing emotion in order to keep it from disrupting our sleep and subsequent waking functioning.


WIRED (@WIRED) tweeted at 6:02 AM – 1 Nov 2019 :
Get. More. Sleep. A new study has found that our bodies clear toxins out of our brains while we sleep and could open new avenues for treating and preventing neurodegenerative diseases like Alzheimer’s.


Not all stages of sleep are equal — deep sleep is the most restorative stage of your night’s rest. Here’s how to get more of it:
Original Tweet:

toward end.. plays (wave-like) sound that is like rhythm of deep sleep.. that gets brain ready for that rhythm and encourages deep sleep



Nightmares can follow adults from childhood, causing distress and sleep deprivation. Here’s how to stop having nightmares and get better sleep in 10 ways.

Nightmares occur during rapid eye movement sleep, the phase during which our muscles relax and we dream. Waking up during REM sleep enables recollection of the dream and resulting distress, said Jennifer Martin, a professor of medicine at the David Geffen School of Medicine at the University of California, Los Angeles, and member of the American Academy of Sleep Medicine’s board of directors.

“One of the most effective ways to treat nightmare problems in adults is actually to get them sleeping more soundly (so) they wake up less often,” Martin said.


wikipedia small


Arianna Huffington

segmented sleep