Shift Work Sleep Disorder (SWSD) is a sleep disorder that causes insomnia and excessive sleepiness. This disorder belongs to the group of Circadian Rhythm Sleep Disorders. It affects people whose working hours overlap with their usual sleeping hours. What are the symptoms of SWSD? A person who has SWSD may… Read More »Shift Work Sleep Disorder
Circadian Rhythm Sleep-wake Disorders
Circadian Rhythm Sleep Disorders (CRSD) are a group of sleep disorders that affect the timing of sleep. Circadian Rhythm is the natural sleep-wake cycle of the human body. When a person has CRSD, they are unable to sleep and wake during normal sleeping and waking hours. Most of the time people with CRSD are unable to cope with the sleep and wake times required for them to properly function on their work or school.
- Shift Work Sleep Disorder
- Sleep-Wake Rhythm Disorders
- Sleep-Wake Phase Disorders
- Advanced Sleep-Wake Phase Disorder
- Delayed Sleep-Wake Phase Disorder
- Irregular Sleep-Wake Rhythm Disorder
- Jet Lag: Symptoms, Risk Factors, and More
- Non-24 Hour Sleep-Wake Disorder
CRSD fall under two basic categories: Intrinsic and Extrinsic. When a person has Intrinsic Disorders, the person’s biological clock is not in alignment with what the rest of society follows. A person can be going to sleep or rising later than usual. They can also be going to sleep or rising at earlier times.
With Extrinsic Disorders, a person’s sleep-wake cycle is aligned with the normal light and darkness patterns. However, their biological clock gets disrupted by their uncommon schedules. The source of this uncommon schedule may be their schoolwork, travels, or occupational demands.
Advanced Sleep Phase Disorder (ASPD)
It is also known as Advanced Sleep Phase Syndrome (ASPS). This is a disorder wherein a person falls asleep a few hours before the normal bedtime and wakes up several hours earlier than most people.
Delayed Sleep Phase Disorder (DSPD)
This is a sleep disorder that is the opposite of ASPD. With DSPD, a person’s sleep pattern gets delayed. A person with DSPD has a much later than normal onset and offset of sleep. This means that they go to sleep later at night. As a consequence, they wake several hours later in the morning. Those with SDPD feel excessively sleepy during the first part of the day.
Irregular Sleep-Wake Rhythm
Those who suffer from this disorder have disorganized Circadian Rhythms. They do not have a clear sleep or wake pattern. When a person has this disorder, they may sleep off and on during the night and take several naps during the day.
Non-24-hour Sleep-Wake Disorder
This disorder is also called Hypernychthemeral Syndrome. In this disorder, a person’s sleep time adjusts later and later each day. This means that the waking time and period of alertness also adjust thus affecting the person’s job or personal life.
Shift Work Sleep Disorder
A person experiences this disorder if his work schedule conflicts with his Circadian Rhythm. This usually happens when the patient’s job requires him to work outside of the traditional 9 AM to 5 PM work schedule.
A person experiences jet lag when he quickly crosses time zones. This happens when a person travels by plane to a location that is 2 time zones away from his home.
Just like any other living organisms, humans have various biological rhythms. One of these is the Circadian Rhythm. The Circadian Rhythm is often called the body clock or the biological clock. The Circadian Rhythm controls sleep timing, among other things. Because of the Circadian Rhythm, a person’s sleepiness doesn’t continuously… Read More »Sleep-Wake Rhythm Disorders
Sleep-Wake Phase Disorders are medical conditions wherein the human body’s natural sleep-wake cycle or Circadian Rhythm gets affected. A normal Circadian Rhythm is one where a person sleeps or wakes at roughly the same each day. This cycle depends on a lot of factors like hormone levels and light exposure.… Read More »Sleep-Wake Phase Disorders
Advanced Sleep-Wake Phase Disorder (ASP) is a disorder that belongs to a group called Circadian Rhythm Sleep Disorders. When a person has this disorder, he sleeps at a time that is earlier than what is “normal” for others. This is the exact opposite of what Delayed Sleep-Wake Phase Disorder (DSP)… Read More »Advanced Sleep-Wake Phase Disorder
Delayed Sleep-Wake Phase Disorder (DSP) is a condition that belongs to the group of Circadian Rhythm Disorders. As its name implies, when a person has this disorder, their sleep gets delayed by two or more hours. This delay is a result of the normal sleep pattern shifting to a later… Read More »Delayed Sleep-Wake Phase Disorder
Irregular Sleep-Wake Rhythm Disorder is a circadian rhythm sleep disorder. Unlike other disorders that belong to this group, this one is rare. Most people go to bed at night and stay asleep until the morning. People afflicted with this disorder have disrupted sleep. They often achieve just a few hours… Read More »Irregular Sleep-Wake Rhythm Disorder
If you’ve traveled to another country or continent and found yourself feeling irritable and unable to sleep, you may have jet lag. It can also cause you to have unexplained headaches. Jet lag is also known as time zone change syndrome or desynchronosis. This is a physiological condition that a… Read More »Jet Lag: Symptoms, Risk Factors, and More
Non-24-Hour Sleep-Wake Disorder belongs to the group of Circadian Rhythm Sleep Disorders. When a person has this disorder, his or her sleep times are not in alignment with what we consider to be normal sleep times. A person with this disorder sleeps a bit later every day. He also wakes… Read More »Non-24 Hour Sleep-Wake Disorder