Agriculture
Hungry bug seeks hot meal
Seeds of the Future
Cleaning Up Fish Farms
Amphibians
Frogs and Toads
Newts
Tree Frogs
Animals
G-Tunes with a Message
Return of the Lost Limbs
Missing Moose
Behavior
Fighting fat with fat
Between a rock and a wet place
Baby Number Whizzes
Birds
Cardinals
Parrots
Blue Jays
Chemistry and Materials
Hitting the redo button on evolution
A Light Delay
A Spider's Silky Strength
Computers
Hitting the redo button on evolution
Seen on the Science Fair Scene
A New Look at Saturn's rings
Dinosaurs and Fossils
Digging for Ancient DNA
A Dino King's Ancestor
An Ancient Feathered Biplane
E Learning Jamaica
Results of GSAT are in schools this week
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
2014 GSAT Results for Jamaican Kids
Earth
A Dire Shortage of Water
Island of Hope
Groundwater and the Water Cycle
Environment
Sea Otters, Kelp, and Killer Whales
Lessons from a Lonely Tortoise
Groundwater and the Water Cycle
Finding the Past
A Long Trek to Asia
The Taming of the Cat
A Big Discovery about Little People
Fish
Electric Catfish
Mahi-Mahi
Perches
Food and Nutrition
Chew for Health
Eat Out, Eat Smart
Allergies: From Bee Stings to Peanuts
GSAT English Rules
Capitalization Rules
Who vs. Whom
Pronouns
GSAT Exam Preparation Jamaica
10 Common Mistakes When Preparing for the GSAT Math Test
Scotiabank Jamaica Foundation Grade Six Achievement Test (GSAT) Scholarships
How are students placed after passing the GSAT exam
GSAT Exams Jamaica Scholarships
GSAT Practice Papers | GSAT Mathematics | Maths
42,000 students will sit for the GSAT Exam in two weeks
Results of GSAT are in schools this week
GSAT Mathematics
Math is a real brain bender
Prime Time for Cicadas
Math and our number sense: PassGSAT.com
Human Body
What the appendix is good for
Gut Germs to the Rescue
Hear, Hear
Invertebrates
Bedbugs
Leeches
Black Widow spiders
Mammals
Rhinoceros
Bandicoot
Asiatic Bears
Parents
Raise a Lifelong Reader by Reading Aloud
Choosing a Preschool: What to Consider
The Surprising Meaning and Benefits of Nursery Rhymes
Physics
Strange Universe: The Stuff of Darkness
Hold on to your stars, ladies and gentlemen
Invisibility Ring
Plants
Sweet, Sticky Science
Tracking the Sun Improves Plant Pollen
Making the most of a meal
Reptiles
Reptiles
Black Mamba
Geckos
Space and Astronomy
A Galaxy Far, Far, Far Away
Galaxies Divide Sharply Along Color Lines
Gravity Tractor as Asteroid Mover
Technology and Engineering
A Light Delay
Machine Copy
Dancing with Robots
The Parts of Speech
Problems with Prepositions
Countable and Uncountable Nouns
What is a Noun
Transportation
Revving Up Green Machines
Seen on the Science Fair Scene
Robots on a Rocky Road
Weather
Either Martians or Mars has gas
A Dire Shortage of Water
Recipe for a Hurricane
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™