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Cycles of Sleep

SLEEP ARCHITECTURE

This describes the stages and cycles of sleep. There are two main categories of sleep:

1. Non-Rapid Eye Movement (NREM)
2. Rapid Eye Movement (REM)

Non Rapid Eye Movement (NREM)

  1. Transitional Phase - Between wakefulness and sleep. This lasts for one to seven minutes and is 5% of the total sleep time.
  2. Light Sleep Phase - This is 50% of the total sleep time.
  3. Slow Wave Phase (Delta Phase) - A deeper and more relaxed sleep associated with 20% of the total sleep time.

Rapid Eye Movement (REM)

This is a period of deep, refreshing sleep. Eyes move side to side and the skeletal muscles are nearly paralysed which results in a loss of muscle tone in the upper airway. This represents 25% of the total sleep time and is the stage where dreaming occurs.

Excessive Daytime Sleepiness (EDS)

People who suffer from obstructive sleep apnea have a fragmented sleep architecture which causes them to spend an excessive amount of time in the lighter stages of sleep at the expense of the Delta Phase and REM stage. This causes them to have excessive daytime sleepiness due to their lack of sleep at night.

Apnea and Hypoapnea

Apnea is defined as a period of cessation of breathing during sleep for ten seconds or longer. If the patient has more than five episodes of apnea per hour of sleep, this is considered clinically significant and helps confirm the diagnosis of obstructive sleep apnea. Hypoapnea occurs when the decrease in airflow results in a 4% decrease in oxyhemoglobin concentration in the blood.

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Ace Dental Care, PC

Monday:

9:00 am-7:00 pm

Tuesday:

9:00 am-7:00 pm

Wednesday:

9:00 am-7:00 pm

Thursday:

Closed

Friday:

9:00 am-5:00 pm

Saturday:

9:00 am-3:00 pm

Sunday:

Closed

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What Our Clients Say About Us

    "I would give her ten if I could. Dr. Williams has been my dentist for over twenty years. In that time, she has never broken an appointment with me. I am pretty type A when it comes to my teeth, and I like her because she always has great tips about how to take care of them. She is uber professional but has a good sense of humor. Her sense of humor is actually a pretty big deal when you have to sit with someone for an extended period of time. I've been in her chair for over an hour a couple of times. Once to get braces done and another time for a teeth whitening. Uncomfortable to say the least, but she went out of her way to ease the pain. I have not considered another Dentist ever since."

    Seun A.

    "Excellent Dentist"

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    "Dr. Williams is an excellent dentist! It's pretty evident that she cares about her patients and she always goes the extra mile. Every visit to her practice is pleasant...she's truly such a patient and kind doctor. Highly recommend!"

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