Final answer:
Delayed Sleep Phase Syndrome (DSPS) is characterized by an inability to fall asleep at a conventional bedtime, difficulty waking up at the desired time, and significant daytime sleepiness as a result of chronic sleep deprivation.
Step-by-step explanation:
Delayed Sleep Phase Syndrome (DSPS) is a condition where a person's sleep is delayed by two or more hours beyond the conventional bedtime. This delay in falling asleep leads to difficulty in waking up at the desired time. The three main symptoms of DSPS include:
- Inability to fall asleep at the desired time: Individuals with DSPS have trouble falling asleep before the late night or early morning hours.
- Difficulty waking up on time: Due to the late bedtime, waking up for school or work at a conventional time is challenging, often resulting in excessive daytime sleepiness.
- Daytime sleepiness: The late bedtime and difficulty waking up lead to chronic sleep deprivation, causing significant daytime sleepiness and reduced alertness.
These symptoms can cause considerable distress and impact social, educational, and occupational functioning. Individuals with such symptoms need to seek medical advice for proper diagnosis and treatment.