Search results
Results from the WOW.Com Content Network
One of the important questions in sleep research is clearly defining the sleep state. This problem arises because sleep was traditionally defined as a state of consciousness and not as a physiological state, [14] [15] thus there was no clear definition of what minimum set of events constitute sleep and distinguish it from other states of partial or no consciousness.
Modern humans often find themselves desynchronized from their internal circadian clock, due to the requirements of work (especially night shifts), long-distance travel, and the influence of universal indoor lighting. [31] Even if they have sleep debt, or feel sleepy, people can have difficulty staying asleep at the peak of their circadian cycle.
The amount of time spent sleeping during the unihemispheric slow-wave stage is considerably less than the bilateral slow-wave sleep. In the past, aquatic animals, such as dolphins and seals, had to regularly surface in order to breathe and regulate body temperature. USWS might have been generated by the need to perform these vital activities ...
A new study offers an explanation as to how deep sleep — also known as slow wave sleep — helps support the formation of memories in the brain, which could help with preventing dementia.
Chronic sleep deprivation (less than 8 hours of sleep) is associated with an increase in body mass index (BMI) and obesity. In a study with 3000 patients, it was found that men and women who sleep less than 5 hours have elevated body mass index (BMI). In another study that followed about 70.000 women for 16 years, there was a significant ...
Also: “Temperature is regulated near the same brain real estate that handles sleep,” adds W. Chris Winter, M.D., a neurologist and sleep specialist in Charlottesville, VA and member of ...
The sleep study was only conducted over a single night, so the data on sleep duration may not represent long-term sleep patterns. Blood pressure decreases by 10% at the time of sleep onset, and ...
Slow-wave sleep is an active phenomenon probably brought about by the activation of serotonergic neurons of the raphe system. [23] The slow-wave seen in the cortical EEG is generated through recurrent connections within the cerebral cortex, where cortical pyramidal cells excite one another in a positive feedback loop.