Agriculture
Middle school science adventures
Springing forward
Getting the dirt on carbon
Amphibians
Newts
Poison Dart Frogs
Frogs and Toads
Animals
Sea Giants and Island Pygmies
Odor-Chasing Penguins
Sleep Affects a Bird's Singing
Behavior
Island of Hope
A brain-boosting video game
Brainy bees know two from three
Birds
Ibises
Tropical Birds
Blue Jays
Chemistry and Materials
Mother-of-Pearl on Ice
Scientist Profile: Wally Gilbert
The hungry blob at the edge of the universe
Computers
Small but WISE
A New Look at Saturn's rings
Computers with Attitude
Dinosaurs and Fossils
Hunting by Sucking, Long Ago
Big Fish in Ancient Waters
Dino Babies
E Learning Jamaica
Results of GSAT are in schools this week
2014 GSAT Results for Jamaican Kids
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Earth
Digging into a Tsunami Disaster
Unnatural Disasters
Groundwater and the Water Cycle
Environment
Groundwater and the Water Cycle
Fungus Hunt
Inspired by Nature
Finding the Past
Your inner Neandertal
A Volcano's Deadly Ash
Childhood's Long History
Fish
Hammerhead Sharks
Halibut
Saltwater Fish
Food and Nutrition
How Super Are Superfruits?
Food for Life
Allergies: From Bee Stings to Peanuts
GSAT English Rules
Pronouns
Who vs. Whom
Adjectives and Adverbs
GSAT Exam Preparation Jamaica
42,000 students will sit for the GSAT Exam in two weeks
How are students placed after passing the GSAT exam
GSAT Scholarship
GSAT Exams Jamaica Scholarships
42,000 students will sit for the GSAT Exam in two weeks
GSAT Scholarship
2014 GSAT Results for Jamaican Kids
GSAT Mathematics
42,000 students will sit for the GSAT Exam in two weeks
GSAT Practice Papers | GSAT Mathematics | Maths
Monkeys Count
Human Body
A New Touch
What the appendix is good for
A Better Flu Shot
Invertebrates
Krill
Flatworms
Wasps
Mammals
Pugs
Mongooses
German Shepherds
Parents
The Surprising Meaning and Benefits of Nursery Rhymes
What Not to Say to Emerging Readers
How children learn
Physics
Dreams of Floating in Space
Powering Ball Lightning
Spin, Splat, and Scramble
Plants
Farms sprout in cities
White fuzzy mold not as friendly as it looks
Seeds of the Future
Reptiles
Turtles
Snapping Turtles
Komodo Dragons
Space and Astronomy
Killers from Outer Space
Saturn's Spongy Moon
Evidence of a Wet Mars
Technology and Engineering
Space Umbrellas to Shield Earth
Musclebots Take Some Steps
Switchable Lenses Improve Vision
The Parts of Speech
Adjectives and Adverbs
What is a Verb?
What is a Noun
Transportation
Reach for the Sky
Where rivers run uphill
Robots on the Road, Again
Weather
Watering the Air
Antarctica warms, which threatens penguins
The Best Defense Is a Good Snow Fence
Add your Article

The chemistry of sleeplessness

When the school year starts, it can be tough to switch from lazy summer mornings to the blaring buzz of an alarm clock. After a few early mornings, extreme fatigue might make you feel like you’re going to fall over. The amazing thing is that you probably manage to stay awake all day long and into the night. But how? A chemical in the brain called dopamine might be part of the answer. According to new research, dopamine is what keeps people who don’t get enough sleep from conking out. The chemical also has a complicated influence on your ability to think and learn when you don’t get enough zzzzz’s. To study sleep loss and its effect on the brain, scientists from the National Institutes of Health in Bethesda, Md., and the Brookhaven National Laboratory in Upton, N.Y., rounded up 15 healthy volunteers. The scientists tested each person’s memory and ability to pay attention twice: once after a good night’s sleep and once after being kept up all night long. During the tests, the scientists measured levels of dopamine in the brains of the volunteers. The results showed that when the volunteers stayed up all night, dopamine levels increased in two parts of the brain: the striatum and the thalamus. The striatum responds to motivations and rewards. The thalamus controls how alert you feel. Higher levels of dopamine, the study suggested, kept the volunteers awake even though they felt tired. In addition, the new research suggests that dopamine levels might play a part in controlling how well people can function without sleep. Some people are miraculously able to think clearly and react quickly, even when they haven’t had much sleep. Other people have a really hard time paying attention when exhausted, and their reaction times slow way down. The researchers found that higher levels of dopamine don’t fend off the trouble people have thinking and learning while sleep-deprived. But the new research does suggest that dopamine levels may play a part in controlling how well people can function without sleep. Dopamine is a complicated chemical, and sleep-deprivation is a complicated state of mind. Even when people think they feel OK, exhaustion makes it difficult for them to learn or think as well as they can when they’re rested. “A little bit of dopamine is good,” says Paul Shaw, a sleep researcher at Washington University in St. Louis. “More is bad. Less is bad too. You’ve got to be in the sweet spot,” to think, respond and learn to your full potential.

The chemistry of sleeplessness
The chemistry of sleeplessness








Designed and Powered by HBJamaica.com™