The neuroscientists attached electrodes to sleeping subjects' scalps to investigate whether dreaming or other brain processes that occur during rapid-eye-movement sleep
periods play a role in the processing of emotions.
If you don't get into restorative rapid-eye-movement sleep
, you will often (like postpartum women during the period of frequent feedings) have an increase in vivid dreams.
It also measures how much time is spent in rapid-eye-movement sleep
- the period when most dreams happen.
Furthermore, severity of sleep apnea as measured by the apnea-hypopnea index, and the degree of oxygen desaturations during rapid-eye-movement sleep
, accounted for more than 90% of the variability in measures of glucose tolerance including hemoglobin [A.
Heintz, Hatten, and other GENSAT researchers discovered that Gscl is produced by neurons in the interpeduncular nucleus, the brain region that also regulates rapid-eye-movement sleep
The shortened sleep periods included a marked decline in rapid-eye-movement sleep
, which is associated with dreaming.
In rapid-eye-movement sleep
(dream sleep) muscles all over the body contract and relax.