What Is Delayed Sleep Phase Syndrome?
Delayed sleep phase syndrome (DSPS) is a disorder of the circadian rhythm. In this, there is a delay in the sleep pattern than usual by a period of two hours or more. As a result, waking up is also delayed, and one might find getting up in the morning to go to school or work challenging. It is also called irregular sleep-wake rhythm disorder. A person with irregular sleep-wake rhythm disorder may have irregular sleep episodes and struggle to maintain a consolidated sleep schedule. In DSPS, it is not that an individual wishes to stay late, but they end up staying late because of a change in their internal body clock. DSPS is not a syndrome with an age predisposition and can occur in anyone. However, it is widely prevalent in teenagers and young adults. In adolescents, the incidence of DSPS is around seven to 16 percent.
What Is the Effect of Delayed Sleep Phase Syndrome?
Delayed sleep phase syndrome results in short sleep periods during the weekdays. They find it difficult to wake up in the morning during the weekends and sleep till late morning or early afternoon. This, in turn, disrupts their day-to-day activities and affects their performances in school or the workplace.
What Is the Cause of Delayed Sleep Phase Syndrome?
The cause of delayed sleep phase syndrome is not precisely known, but the following factors have been attributed:
- Pubertal Changes: The sleep-wake cycle tends to become longer with puberty, resulting in delayed sleep and wake-up times. As their age advances, they become more responsible and take up social activities, disrupting their sleep-wake cycle.
- Insomnia: People who have chronic insomnia develop delayed sleep phase syndrome. It has been estimated that around one-tenth of people affected with chronic insomnia get DSPS.
- Family History: Having a close relative or family member who has delayed sleep phase syndrome can put the individual at an increased risk of getting the syndrome. The percentage of risk is around 40 in these cases.
- Sleeping Habits: Sleeping habits limiting exposure to light in the morning or increasing light exposure at night might bring about delayed sleep phase syndrome.
-
Psychological Disorders: The following psychological disorders have an association with delayed sleep phase syndrome:
-
Anxiety.
-
Attention deficit hyperactivity disorder.
-
Depression.
What Are the Signs and Symptoms of Delayed Sleep Phase Syndrome?
The following signs and symptoms help in identifying sleep phase syndrome:
- Difficulty in Falling Asleep: Individuals with DSPS exhibit signs of insomnia further aggravated by social pressures, homework, or usage of cell phones and the internet.
- Difficulty in Waking Up: It is a sequel to delayed sleep time. Lack of sleep during the night eventually leads to delayed morning waking-ups on the weekends and daytime sleepiness on the weekdays when they wake up to work or school.
- Behavioral Problems: Delayed sleep phase syndrome might bring about depression and problems with behavior in those children and adolescents who experience it. Behavioral issues with DSPS include daytime sleepiness and missing school and work, which might lead to inattention and poor performance in academics or work.
- No Sleep Problems: If people with DSPS do not have any other associated sleep disorders, they do not have disturbed sleep. These individuals with delayed sleep phase syndrome only have difficulty falling asleep; however, after sleeping, they do not tend to have any disturbances and sleep with no or few awakenings through the night.
How Is Delayed Sleep Phase Syndrome Diagnosed?
The diagnosis of DSPS is described below:
-
The healthcare provider may assess the symptoms present in the affected individuals to help diagnose delayed sleep phase syndrome.
-
The doctor will ask the person to maintain a sleep log or sleep diary; a day-to-day sleep record helps identify this syndrome.
-
In addition, other devices like actigraphy and polysomnography help in diagnosis. An actigraph is a non-invasive device that resembles a wristwatch, and a polysomnogram is a sleep study done overnight to detect the presence of any other associated sleep disorders.
-
Melatonin test and core temperature rhythms are marked when tests are indicated for research purposes.
How Is Delayed Sleep Phase Syndrome Treated?
The treatment of DSPS is described below:
- Practicing Good Sleep Habits:
-
-
Avoid caffeine-containing products like chocolates, coffee, tea, medications, and energy drinks before bed.
-
Do not take any stimulants that disturb sleep, like nicotine, sleeping tablets, tobacco, and alcohol.
-
Keep the bedroom cool and calm.
-
Avoid stimulating devices like computers, televisions, tablets, and smartphones.
-
Avoid doing strenuous activities before going to bed.
-
- Chronotherapy:
In this method, bedtime is delayed by one to three hours more than usual to shift the internal clock. It is done in the subsequent days when an individual is free from social activities. These therapies should be tried during long vacations or school breaks. Chronotherapy is followed until the desired bedtime is reached. The success of this type of strategy lies in the fact that the body quickly adapts to sleeping late rather than trying to sleep early.
- Advancing Internal Clock:
Advance the bedtime in subsequent steps. Each successful night, the bedtime is advanced until the desired sleeping time is reached. For example, if an individual goes to bed by midnight on the first day, tries to sleep the next day by 11.45 PM, and so on till they achieve the desired time.
- Bright Light Therapy:
Increasing the exposure to bright light in the morning and reducing its exposure in the evening helps sleep.
- Medications:
Medications like Melatonin and sedatives can be tried to induce sleep, but these should be taken only on the physician's advice. Melatonin is a hormone responsible for controlling the sleep-wake cycle.
Conclusion:
Delayed sleep phase syndrome might seem like a negotiable problem, but remember, it is only the tip of an iceberg, and plenty of underlying things must be paid attention to. Therefore, if an individual seems to experience a disruption in the sleep-wake cycle, try to learn measures to overcome it. If not, reach out to the healthcare provider at the earliest.
