The Holy Grail of Biological Questions: Why Do We Sleep?

The Holy Grail of Biological Questions: Why Do We Sleep?
In this blog, I am going to deal with a question that has stumped some of the most talented researchers in the world.  That should hopefully get your attention- this vexing question seems simple, but represents the “holy grail” of biology.  The question: why do we sleep?  Consider this- we spend approximately one-third of lives doing it and scientists are still not quit sure why.  (Much of this and future blogs on...

S.A.D. and Circadian Rhythms
“If we had no winter, the spring would not be so pleasant: if we did not sometimes taste of adversity, prosperity would not be so welcome.”   - Anne Bradstreet, British poet   It’s that time of the year again.  Especially for those of us not fortunate enough to live in warmer climes- the winter is coming.  As we all know, along with the season comes shorter days and longer nights.  Some of us may...

Bugs, Bugs, Bugs
It's annoying for anyone to have a buzzing mosquito flying around the room. They land for an instant, never long enough to swat them, but just enough to arouse, then off they go again for another circle of the room. This is not only irritating to a child but can be downright frightening.   To help keep mosquitoes and other flying insects out of the house, make sure doors are closed quickly. Don't stand and chat with a neighbor with the...

The Function of Sleep Not Quite Explained
We finished the last blog in mid-thought.  We were talking about REM sleep and the idea of brain plasticity- the rewiring of our brains that take place when we learn new information.   A recent study in rats showed that 4 days of REM sleep deprivation decreased the amount of new cells in the part of the brain that is associated with long-term memory, in other words they did not make those new circuits.   Another study with...

Relieving Those Restless Legs
Let’s continue talking about restless legs syndrome (RLS).   We reviewed some of the symptoms, causes, and adverse effects of restless legs syndrome in the past two blogs, now let’s talk about how RLS is diagnosed.  Due to the unusual sensations that patients with RLS complain of, it is sometimes difficult for a healthcare provider to determine if these complaints are actually related to RLS.  Contrary to popular...

Treating the Winter Blues
In my last blog we began a discussion of seasonal affective disorder or SAD.  We will pick up where we left off.   There is actually some debate in the psychiatric community whether or not SAD is actually a separate diagnosis, apart from general depression.  Those who claim it is not suggest that it is no more than a seasonal coincidence that occurs in someone with recurring episodes of depression.  As support to this idea...

Lack of Exercise = Lack of Sleep
Tommy sprawls on the couch, his eyes glued to the TV screen and the latest Spiderman movie. Shelly is curled up in the easy chair, her only movement her fingers on the controls of her Game Boy.   It's a perfect summer day filled with golden sunshine and light breezes. Tommy should be outside playing baseball. On the sidewalk across the street, Shelly's friends are engaged in a game of hopscotch. But hey! Both the kids are quiet and...

Memory, Brain Function, and REM Sleep: Are They Related?
In my last blog we discussed at length the different stages of sleep, namely non-REM and REM, the biological need for sleep to stay alive, and started discussing what some researchers believe may be the function of some portions of non-REM sleep.  We reviewed how there is some evidence linking declarative memory (memory of facts and figures) to slow wave sleep and procedural memory (the ability to perform tasks like riding a bike or playing...