Actually so many studies on partial and complete deprivation, which making confusion to know the real concept behind this.
Hello Arbind Kumar,
Sleep deprivation is a relative construct. The concern lies in its physiological and behavioural effects. Amount of prior sleep and sleep architecture, circadian time, period of wakefulness- all have shown to be related to ones respond to sleep loss. Person-to- person variability to sleep deprivation is important to consider - age, genetic sensitivity, personality types, and environmental characteristics in which sleep loss occurs.
Clinically,sleep deprivation constitutes a base of the diagnosis of insufficient sleep syndrome. Several primary sleep disorders also evolve from sleep deprivation.
Best wishes,
Tatyana
Partial sleep deprivation (REM deprivation) is more effective in treatment of endogenous depression then the total sleep deprivation. The mechanism is simmilar to REM supression by triciclyc antidepressive drugs.
Further to Nikola Ilankovic's response, non-REM sleep - as measured by EEG - is comprised of 4 distinct stages (i.e., stage 1-4) distinguished by characteristic waveforms. Stages 3 & 4 - often called deep sleep - are characterized by high-voltage slow wave activity, and thus is known as slow wave sleep (SWS). In normal sleep, the progression of sleep across the night follows a well-defined, predictable pattern: with sleep beginning with non-REM - progressing through stages 1 to 4 - then transitioning to REM after ~80min, after which non-REM and REM sleep alternate throughout the night in a ~90min cycle (see Principles and practice of sleep medicine, ed. Kryger, Roth, & Dement).
Given this defined sleep pattern, it is possible to selectively deprive a subject (i.e., a person or animal) of either SWS or REM, or both - which is called partial sleep deprivation. By contrast, total sleep deprivation involves keeping the subject awake at all times (i.e., not allowing any stage of non-REM or REM sleep). Please see Michael Bonnet's chapter "Sleep Deprivation" in the aforementioned text for detailed discussions on total sleep deprivation and partial sleep deprivation.
Note that partial sleep deprivation is sometimes confused with chronic sleep debt, but these are distinct terms. Chronic sleep debt refers to a condition that results from persistent short duration sleep - which is associated with increased daytime sleepiness, fatigue, cognitive impairments, and altered sleep architecture (i.e., rebound SWS and REM). So sustained partial sleep deprivation can cause chronic sleep debt, but they are very different terms.
Hope this helps!
Best regards,
Glenn.
Article Principles and practice of sleep medicine, third edition. Ed...
Interesting classification, Glenn. Seems to be more appropriate to call SWS or REM sleep, or both 'selective sleep stage deprivation' rather than partial sleep deprivation. Nonetheless, interesting discussion.
Kind regards, Tatyana
Good point, Tatyana! Indeed, the term selective sleep deprivation has been used in the literature. Because there may be some inconsistency in how these terms are used in the literature, I think the most important thing is to be very clear about what one is referring to.
CORRECTION: Upon further review, I was mistaken in my earlier post! Michael Bonnet defines Partial Sleep Deprivation as "nonsleep stage-specific reduction in total sleep" ("Sleep Deprivation" in Principles and practice of sleep medicine; p. 61). Thus in her post above, Tatyana was correct that the sleep deprivation I referred to is called Selective Sleep Deprivation.
My apologies for my error :(
Best regards, Glenn.
When attempting to define each of these constructs, I think it's important to also reference sleep restriction, which limits an individual's TST. This becomes trickier to distinguish from partial sleep deprivation when considering Bonnet's definition of "nonsleep stage-specific reduction in total sleep," as referenced in Dr. Landry's comment.
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