[…] the scientists were able to lower skin temperature less than a degree Centrigrade without affecting core body temperature. The changes were dramatic. People didn’t wake up as much during the night and the percentage of the sleep spent in stages 3 and 4 (deep sleep) increased.
Here’s an interesting fact: you don’t sweat or shiver during REM sleep. Sleep researcher Jim Horne compares the REM non-thermal regulation period to that of normal functioning of babies, who neither sweat nor shiver even when awake.
‘Often, depressed people say they don’t want to go out with their friends,’ says Salamone. But it’s not that they don’t experience pleasure, he says – if their friends were around, many depressed people could have fun.
‘Low levels of dopamine make people and other animals less likely to work for things, so it has more to do with motivation and cost/benefit analyses than pleasure itself,’ he explains.
If you are involved with someone who is unpredictably loving, you might not like it very much — but your reward circuit is sure going to notice the capricious behavior and give you information that might conflict with what you believe consciously is in your best interest.
These data might explain, in part, the paradox of people who complain constantly about their unreliable lovers, but keep coming back to them, time and again.
