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Sleep Disorder Specialists Yorktown VA

Looking for Sleep Disorder Specialists in Yorktown? We have compiled a list of businesses and services around Yorktown that should help you with your search. We hope this page helps you find Sleep Disorder Specialists in Yorktown.

Carl O. Helvie
(757) 848-9193
Hampton, VA
Membership Organizations
American Holistic Health Association (AHHA)

Data Provided By:
Dunagan- A J District Of Columbia
(757) 989-5160
6515 George Washington Maine
Yorktown, VA
 
Food Herbs & More
(757) 898-0100
2821 Denbigh Boulevard
Yorktown, VA
 
Acupuncture & Oriental Medicine
(757) 898-0200
13195 Warwick Boulevard Suite 1D
Newport News, VA
 
A Perfect Style
(757) 249-5500
307 Oyster Point Rd
Newport News, VA
 
Debbie Gallagher Massage
(757) 898-4480
6500 George Washington Maine
Yorktown, VA
 
C V S/ Pharmacy
(757) 898-7943
4501 Lafayette Blvd
Fredericksburg, VA
 
Armstrong Chiropractic
(757) 873-7786
872 J Clyde Morris Blvd Ave
Newport News, VA
 
Accident and Injury Center of Denbigh
(757) 877-3770
13784 Warwick Boulevard Suite B
Newport News, VA
 
Body Shoppe Spa
(757) 596-4847
1730 George Washington Memorial Hwy
Yorktown, VA
 
Data Provided By:

The Different Stages of Sleep

 Sleep 

In 1952, sleep-researcher Nathaniel Kleitman discovered that although sleepers tended to have slow, rolling eye movements beneath their lids as they fell asleep, during some portions of their sleep their eyes darted rapidly in a highly coordinated way, moving more quickly and sharply than they could while they were awake. He dubbed the phenomenon rapid eye movement (REM), a phase of sleep that was later related to dreaming.

Later researchers using electroencephalogram (EEG) that measures the electrical activity in the brain discovered that the REM stage of sleep is different from non-REM (NREM) sleep.

Sleep occurs in a series of cycles, each lasting between sixty and ninety minutes. A normal sleep pattern involves four to seven such cycles during the course of the night. On average, people have five or six sleep cycles during a normal nighttime sleep session.

Each cycle has two main parts. 

During the first part, our level of consciousness falls while the level of unconsciousness rises. This part of the cycle involves changes in heart rate and breathing, and an overall slowing of brain activity. We do not dream during this phase. 

In the second part of the cycle, however, we do dream. The characteristic sign of this phase of sleep is rapid eye movement, or REM.

Generally, each ninety-minute sleep cycle contains a non- REM period (or slow-wave sleep) and the REM period. On average, each of these two main periods occupies about 50 percent of the cycle's elapsed time, or about forty-five minutes. However, the balance between the two periods shifts during the course of the night. During the first ninety-minute cycle, the REM phase might last only a few minutes. In the final cycle of the night, REM sleep occupies most of the time, perhaps an hour or more.

Non-REM sleep actually consists of four distinct substages, labeled 1 through 4. The stages are defined according to the ...

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