Delayed Sleep Phase Syndrome and PDA
What is DSPS? DSPS (Delayed Sleep Phase Syndrome); also sometimes called DSPD, and DSWPD (Delayed Sleep-Wake Phase Disorder), is a circadian rhythm sleep disorder which causes an individual's sleep-wake cycle to be significantly later than the social norm. An individual's sleep delay may be anything from a few hours later than society's average (for example, sleeping from midnight until 8AM) to – in very extreme cases – over twelve hours later (e.g., sleeping from midday until 8PM). It is common also for DSPSers to need more than eight hours sleep per "night", causing their natural wake times to be even later than might be expected following their already delayed sleep times. Additionally, DSPSers commonly experience extended sleep inertia , whereby our brains are slow to fully wake. Sleep inertia may last from one hour to several hours. During this time, the individual will feel groggy, verbally limited, and clumsy. As well as causing sleep-depriva...