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Fun Facts About The Brain

Saturday, May 23rd, 2009 Posted in Interesting | No Comments »

Dimensions and Sizes

  • Average dimensions of the adult brain: Width = 140 mm/5.5 in, Length = 167 mm/6.5 in, Height = 93 mm/3.6 in.
  • How much does human brain weigh? At birth our brains weigh and average of 350-400g (about 4/5 lbs), as adults the brain averages 1300-1400g (about 3 lbs).
  • If Stretched out the cerebral cortex would be 0.23 sq. m(2.5sq.ft), the area of a night table.
  • Total surface area of the cerebral cortex is 2,500 cm2 or 2.69 sq.ft.

Composition

  • The composition of the brain = 77-78% water, 10-12% lipids, 8% protein, 1% carbs, 2% soluble organics, 1% inorganic salt.
  • The breakdown of intracranial contents by volume (1,700 ml, 100%): brain = 1,400 ml (80%); blood = 150 ml (10%); cerebrospinal fluid = 150 ml (10%).
  • The cerebellum contains half of all the neurons in the brain but comprises only 10% of the brain.
  • The cerebral cortex is about 85% of the brain.
  • Percentage of total cerebral cortex volume = frontal lobe 41%, temporal lobe 22%, parietal lobe 19%, occipital lobe 18%.
  • There are about 100 billion neurons in the human brain, the same number of stars in our galaxy.
  • The left hemisphere of the brain has 186 million more neurons than the right hemisphere.
  • 750-1000ml of blood flow through the brain every minute or about 3 full soda cans.
  • In that minute the brain will consume 46cm3 (1/5 cups) of oxygen from that blood.
  • Of that oxygen consumed, 6% will be used by the brain’s white matter and 94% by the grey matter.

Times

  • The brain can stay alive for 4 to 6 minutes without oxygen. After that cells begin die.
  • The slowest speed at which information travels between neurons is 416 km/h or 260 mph, thats as “slow” as todays supercar’s top speed (the Bugatti EB 16.4 Veyron clocked at 253 mph).
  • 10 seconds is the amount of time until unconsciousness after the loss of blood supply to the brain.
  • Time until reflex loss after loss of blood supply to the brain, 40-110 seconds.
  • During early pregnancy the rate of neuron growth is 250,000 neurons a minute.

Other Fun Facts About The Human Brain

  • Results from cognitive tests show 30% of 80-year-olds perform as well as young adults.
  • Your brain is about 2% of your total body weight but uses 20% of your body’s energy.
  • The energy used by the brain is enough to light a 25 watt bulb.
  • More electrical impulses are generated in one day by a single human brain than by all the telephones in the world.
  • How much does human brain think? 70,000 is the number of thoughts that it is estimated the human brain produces on an average day.
  • After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
  • Albert Einsteins brain weighed 1,230 grams (2.71 lbs), significantly less then the human average of 1,300g to 1,400g (3 lbs).
  • Each year Americans consume 50 billion aspirin tablets or 15.5 million tons.
  • 89.06 is the percentage of people who report normally writing with their right hand, 10.6% with their left and 0.34% with either hand.

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What to Do If You Get Flu-Like Symptoms

Saturday, May 16th, 2009 Posted in Health Tips | No Comments »

The H1N1 flu virus — swine flu to you — is causing illness around the world and is likely to do so for some time to come. As a result, you or people around you may become ill. If so, you need to recognize the symptoms and know what to do.

Here are some points from the U.S. Centers for Disease Control and Prevention (CDC).

Symptoms

Common symptoms include fever, headache, tiredness, cough, sore throat, runny nose, body aches, diarrhea, and vomiting. Nearly all persons with flu will have at least two of these symptoms.

The high risk groups for H1N1 flu are not known at this time but it’s possible that they may be the same as for seasonal influenza. People at higher risk of serious complications from seasonal flu include people age 65 years and older, children younger than 5 years old, pregnant women, people of any age with chronic medical conditions (such as asthma, diabetes, or heart disease), and people who are immunosuppressed (e.g., taking immunosuppressive medications, infected with HIV).

Avoid contact with others

If you are sick, you may be ill for a week or longer. You should stay home and avoid contact with other persons, except to seek medical care. If you leave the house to seek medical care, wear a mask or cover your coughs and sneezes with a tissue. In general you should avoid contact with other people as much as possible to keep from spreading your illness.

You can spread the flu to others starting 1 day before you have symptoms to at least 7 days after you become ill (children can be up to at least 10 days).

Available treatment

It is expected that most people will recover without needing medical care.

If you have severe illness or you are at high risk for flu complications, contact your health care provider or seek medical care. Your health care provider will determine whether flu testing or treatment is needed. Be aware that if the flu becomes widespread, there will be little need to continue testing people, so your health care provider may decide not to test for the flu virus.

Antiviral drugs can be given to treat those who become severely ill with influenza. These antiviral drugs are prescription medicines (pills, liquid or an inhaler) with activity against influenza viruses, including H1N1 flu virus. These medications must be prescribed by a health care professional.

There are two influenza antiviral medications that are recommended for use against H1N1 flu. The drugs that are used for treating H1N1 flu are called oseltamivir (trade name Tamiflu) and zanamivir (Relenza). As the H1N1 flu spreads, these antiviral drugs may become in short supply. Therefore, the drugs will be given first to those people who have been hospitalized or are at high risk of complications. The drugs work best if given within 2 days of becoming ill, but may be given later if illness is severe or for those at a high risk for complications.

Emergency warning signs

If you become ill and experience any of the following warning signs, seek emergency medical care.

In children emergency warning signs that need urgent medical attention include:

  • Fast breathing or trouble breathing
  • Bluish or gray skin color
  • Not drinking enough fluids
  • Severe or persistent vomiting
  • Not waking up or not interacting
  • Being so irritable that the child does not want to be held
  • Flu-like symptoms improve but then return with fever and worse cough

In adults, emergency warning signs that need urgent medical attention include:

  • Difficulty breathing or shortness of breath
  • Pain or pressure in the chest or abdomen
  • Sudden dizziness
  • Confusion
  • Severe or persistent vomiting
  • Flu-like symptoms improve but then return with fever and worse cough

Protect yourself

  • Stay informed. Health officials will provide additional information as it becomes available.
  • Cover your nose and mouth with a tissue when you cough or sneeze. Throw the tissue in the trash after you use it.
  • Wash your hands often with soap and water, especially after you cough or sneeze. Alcohol-based hand cleaners are also effective.
  • Avoid touching your eyes, nose or mouth. Germs spread this way.
  • Try to avoid close contact with sick people.
  • If you are sick with a flu-like illness, stay home for 7 days after your symptoms begin or until you have been symptom-free for 24 hours, whichever is longer. Keep away from other household members as much as possible. This is to keep you from infecting others and spreading the virus further.
  • Learn more about how to take care of someone who is ill in “Taking Care of a Sick Person in Your Home”
  • Follow public health advice regarding school closures, avoiding crowds, and other social distancing measures.

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Clean hands protect against H1N1 (Swine Flu) infection

Sunday, May 3rd, 2009 Posted in Health Tips | 1 Comment »

Protect yourself

  • Clean your hands regularly.
  • Wash your hands with soap and water, and dry them thoroughly.
  • Use alcohol-based handrub if you don’t have immediate access to soap and water.

How do I wash my hands properly?

Washing your hands properly takes about as long as singing “Happy Birthday” twice,
using the images below.

Source from World Health Organization (WHO)

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What You Need to Know about H1N1 (Swine Flu)

Wednesday, April 29th, 2009 Posted in Health Tips, Useful Tips | 3 Comments »

1. How do symptoms of swine flu differfrom other types of flu?

None, really, although this flu might include gastrointestinal symptoms (diarrhea and vomiting), as well as the usual respiratory symptoms. The basic symptoms for swine flu are similar to the seasonal flu we are vaccinated for each year, which may include:

• Fever (greater than 100°F or 37.8°C)
• Sore throat
• Cough
• Stuffy nose
• Chills
• Headache and body aches
• Fatigue

2. If I felt flu-like, how would I know if I had swine flu?

You wouldn’t really, nor would your physician know for sure without a respiratory specimen taken within the first 4-5 days. The specimen would then be sent to the US Centers for Disease Control and Prevention (CDC).

The cases so far in the US have been relatively mild compared to the illness described in patients in Mexico. We do not yet know why the US cases have been milder.

The important point is to call your doctor if you think you have the flu. Prescription anti-viral drugs such as TamiFlu or Relenza can be called in by your doctor. Unless you are:

• exceptionally ill with flu-like symptoms
• are chronically ill
• immune-suppressed
• quite elderly
• or have a very young child, under age 2.

It is best not to report to the hospital, clinic or doctor’s office, where you could risk spreading the disease. Again, call your doctor first to get instructions as to what you need to do next.

3. How long are people contagious?

Adults are potentially contagious for the length of time one has symptoms, up to 7 days following the beginning of illness. The “shedding stage” of the virus is during the first 4-5 days of illness. Children can be considered contagious longer, up to 10 days. The initial incubation period is 24-48 hours.

4. Is there medication for this?

Yes, Tamiflu or Relenza have shown to be effective against these recently reported strains of swine flu. Altogether, there are four anti-viral drugs that we commonly use to treat various strains of flu.

5. Can I start taking medicine for it now, just in case I get it later?

That is not presently advised. Preventative medication might be advised for very special circumstances where a person had to expose themselves to potentially ill people during an epidemic (which we do not yet have here). Such people might include ER workers. An outbreak in a nursing home, for instance, might lead to protecting all the other residents with a drug like TamiFlu.

For the general public, the current answer is no to prophylactic (preventative) use with anti-viral medications. Its coverage time is limited.

Do not confuse over-the-counter “cold and flu” preparations for anti-flu medications that require a prescription.

6. Are the symptoms in children different from adult symptons?

Though the basic symptoms are similar, the signs of potentially life-threatening complications differ.

The CDC advises those with these symptoms to seek emergency care immediately: Emergency warning signs in children are:

• Fast breathing or trouble breathing
• Bluish skin color
• Not drinking enough fluids
• Not waking up or interacting
• Being very irritable
• Fever with a rash Emergency warning signs in adults are:
• Difficulty breathing or shortness of breath
• Pain or pressure in the chest or abdomen
• Sudden dizziness
• Confusion
• Severe or persistent vomiting

7. Is there a vaccine?

Not yet, but the CDC has this current strain of virus and will consider whether to add it to next year’s flu vaccine as time goes on.

8. If I took the swine flu vaccine in the swine flu scare during the 70s, would that cover me? What about this year’s flu shot I just took?

We don’t know yet. Previous vaccines could be expected to afford only partial, incomplete protection at best.

This new strain of the swine flu virus (H1N1) actually has a mixture of swine and avian components (not to be confused with the deadly avian flu of Southeast Asia).

9. Can I catch it from pigs?

No. This strain is one that is communicable through human-to-human contact. It is a mutated form of a swine virus.

10. Can I catch it from eating pork?

Absolutely not! Swine flu is not transmitted by food. It is not a so-called foodborne illness. Bacon, ham and other pork products are safe to eat, assuming they are prepared properly. An internal temperature of 160 degrees for cooked meat will kill any bacteria or virus.

Swine flu is transmitted by airborne droplets from an infected person’s sneeze or cough; or from germs on hands, or germ-laden surfaces. Eating pork will not give you swine flu any more than eating chicken will give you bird flu.

11. How does it cross from a pig to a human?

The swine virus mutates so that it can infect humans and be spread by humans.

12. Can it kill me?

Deaths have been reported from the Mexico City outbreak. So far the cases in the US have been mild and there have been no deaths as of this writing (Monday, April 27) We do not know all the factors geographically and demographically that may contribute to the mildness or severity of this flu. But, like seasonal flu, there is the potential for serious outcomes.

13. Why the big concern if the regular flu kills 35,000 people a year, which is why we are all encouraged to get a flu shot?

This is a new flu strain that our bodies have not been exposed to before. The flu strains that the CDC creates a vaccine for each year all have the potential to cause great harm, especially in elderly, pediatric and chronically ill patients.

This particular flu strain has struck seemingly healthy, young adults, with some resulting in death in Mexico. It also appears to be quite contagious. We will know more about this strain in the coming days.

14. How is it different from avian (bird) flu?

Avian flu so far has had difficulty infecting humans unless they are exposed intensely to birds, because the virus has not mutated in a way that makes it transmissible by humans to other humans. This virus has origins genetically from both pigs and birds, and the big difference from the avian flu is that this swine virus can be transmitted readily from human to human.

15. Is this just another scare that will go away like bird flu?

Bird flu is a theoretical threat and will need a mutation to be able to be transmitted among humans to become a serious threat. The present “swine/avian” virus clearly has already caused a major outbreak in Mexico City and San Luis Potosi, Mexico and has spread to places in the US (California, New York, Texas, Kansas and Ohio).

What is not clear yet is whether this virus will result in a so-called pandemic—worldwide spread with major outbreaks — or whether it will fizzle out. But, even if it fizzles out, there is logical concern that it might re-emerge next flu season.

16. Should I cancel my vacation to Mexico?

At this writing, the situation is very fluid, changeable. I suggest checking frequently with the CDC Web site for possible Travel Alerts. I probably would not travel to Mexico City for a vacation that could easily be rescheduled, if for no other reason than the city has tried to limit access to crowded or public places where transmission might be facilitated. That does not sound like a very pleasant vacation to me!

Having said that, there are more than 4,000 flights to Mexico from the US and none have been cancelled as of this writing. However, some international airports in Europe and Asia are stepping up precautions and issuing alerts. Again, check the CDC’s Travel Alerts page.

17. What if I’m on a plane? Should I wear a mask?

Not necessary. The air on a plane is filtered. Transmission might occur if someone sitting close to you coughs or sneezes on you. The newer designs of aircraft airflow keep the air in a top-down flow, not forced air from front to back. However, if you do have a respiratory illness, it might be best not to travel.

18. How long does the germ live on surfaces, like on my desk if someone sneezes in my office?

Influenza virus survives only minutes on inanimate objects or hands, so these are very inefficient ways to spread the illness. Influenza is most easily spread by droplets that come into contact with our mucus membranes such as when someone coughs or sneezes in our faces.

If we shake hands with an infected person who has just wiped their nose and then we rather quickly rub our nose or eyes with our own hand, then we could get the flu. So, good hand washing does play a role in diminishing the spread of the disease.

19. Other than hand washing and covering my mouth if I sneeze or cough, what can I do to take care of myself and others?

If you are ill, stay home. Control your sneezes and coughs. If you cough into your hand, remember the virus could be live on your hand at least for a few minutes, so wash your hands before touching anyone else. If you get symptoms suggesting the flu, call your doctor, who can call in a prescription for medication to treat the flu.

Resist going to the doctor’s office or a hospital ER for influenza symptoms unless you are seriously ill. You do not want to spread the disease to others.

20. What else can I do?

Keep in touch with the most recent CDC messages through the following links:

www.cdc.gov/swineflu/investigation.htm
www.cdc.gov/swineflu/general_info.htm
www.cdc.gov/swineflu/whatsnew.htm

Go to the sources of verifiable information such as WHO (World Health Organization) or the CDC.

Most important, be alert, not panicked.

“There is a huge difference between preparedness and paranoia”, says Dr. Robert Emery, occupational health expert at the UT School of Public Health at Houston. “Although we’re dealing with a new strain of flu, a set of universally applicable preventive measures exist that can be employed right away by everyone to help stop the spread of this disease”

Proper hand hygiene:

There’s a right way and useless way to wash hands — and wash away — micro-organisms. The object is to break down the protective membranes of germs, dislodge them from your hands and let them go down the drain. Plain soap in the right hands is strong stuff.

• Lather well with a bar of soap or squirt a coin size of liquid soap in the palm of your hand.
• Vigorously rub your hands together, soap up between your fingers, AND your wrists, front and back for 15 seconds. Sing the first chorus of any song you know and that’ll take you through the 15 seconds.
• Rinse under warm, RUNNING water. Remember, the object is to dislodge germs. The force of water is key.
• Dry thoroughly your hands with a disposable towel or under the blower, again, rubbing your hands together.
• Discard the towel.

If you’re using alcohol-based gels as hand cleansers:

• Put a dime-sized amount in one hand:
• Vigorously rub your hands together and in between your fingers until the GEL IS DRY—about 30 seconds.
• DO NOT touch your face!

Once your hands are clean, do not touch your face, nose, eyes or lips. Rubbing your eyes and nose provides a freeway for micro-organisms and good breeding ground once they’ve arrived.

Cover your cough

If you must cough or sneeze, cover your mouth with a tissue, your sleeve or your hand.
• Throw the tissue away in a waste basket. Do not leave discarded tissues on your desk or other surfaces.
• Then, wash you hands thoroughly.
• The throw-it-away part is essential. Micro-organisms live a life span from a few seconds to days on inanimate surfaces such as desks, table tops, faucets…tissues. If your tissues are scattered on your coffee table, they then are in contact with community surfaces. Both the tissues and the surface it sits on can spread germs to the person who touches the coffee table.

If you begin to feel ill: feverish, achy, have a dry, painful cough, sore throat, go home from school or work and call your health care provider for further instructions.

If you feel sick with flu-like symptoms and you care for the very young or the very elderly or the chronically ill, inform your health care provider when you call their office.

If you have recently traveled to Mexico or to one of the areas worldwide that has reported a swine flu outbreak, inform your health care provider. He or she may prefer to treat you with prescription anti-viral medications from home, or may request that you come in for a visit. Follow instructions from your health care providers.

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What is Deep Vein Thrombosis (DVT)?

Wednesday, April 15th, 2009 Posted in Health Tips, Travel | No Comments »

DVT is Deep Venous (Vein) Thrombosis, more commonly referred to as “economy class syndrome” in the media. Of late, DVT has gained accelerated notoriety in the world’s press as the general public’s awareness of the problem has became more prevalent.

The link between DVT and long haul air travel was first introduced in medical journals in the 1950s which highlighted the potential risk long periods of immobility during long haul flights presented.

Even today, there remains a great deal of ignorance surrounding DVT, despite the fact that more people are flying than ever before.

First and foremost, DVT is not a problem restricted to air travellers, and anyone travelling for prolonged distances by car, bus or train are at equal risk.  There is, in fact, no real evidence to suggest that air travel is responsible for an increased likelihood for DVT over any other situation where the condition may be arising.

In short, DVT is a result of extended periods of immobility (flights lasting in excess of five hours) which can lead to the development of a blood clot.

DVT is most common in the lower limbs, whereby pain, swelling and discoloration of the affected region may occur. The leg may also show a congestion of superficial veins.

Unfortunately, these are only general symptoms and in the majority of cases, symptoms are hard to initially discern.

Clinical diagnosis of DVT is difficult, and a specialist is usually required to confirm diagnosis, as the symptoms of DVT can closely match a number of other medical conditions.

In extreme cases, a pulmonary embolism may occur, which is the result of small pieces of the clot detaching and being carried through the blood stream to the heart and lungs.

The product of an extensive clot in the leg, this may happen several days or hours after the formulation of the clot. This may result in chest pains, shortness of breath and even sudden death.

Our blood clots naturally as a means of protection against the severe blood loss from damage to veins and arteries. Blood is supposed to clot only when it is outside the blood vessel, however, in abnormal cases, the blood can clot while still in the blood vessel.

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Facts About Friday the 13th

Friday, March 20th, 2009 Posted in Interesting | No Comments »

The origin of the link between bad luck and Friday the 13th is murky. The whole thing might date to Biblical times (the 13th guest at the Last Supper betrayed Jesus). By the Middle Ages, both Friday and 13 were considered bearers of bad fortune.

Here are some Friday-the-13th facts:

  • According to Smithsonian Magazine “fear of the #13 costs American a billion dollars per year in absenteeism, train and plane cancellations, and reduced commerce on the 13th of the month.”
  • Fear of Friday the 13th dates back to Nordic Mythology. Many of their thirteenth Gods met with violent deaths, such as Loki, the trickster.
  • Ancient Romans regarded the number 13 as a symbol of death, destruction and misfortune.
  • Lizzy Borden uttered a total of 13 words at her trial.
  • There were 13 original colonies.
  • A witches coven consists of 13 members.
  • Tarot Card number 13 is the Death Card, depicting the Grim Reaper (although it is read as transition or change and not literal death).
  • Hotels rarely have a room number 13. Usually it is called 12a or 14. Same with floors of buildings and the elevators without a #13 button. Highways sometimes will skip exit 13 altogether also.
  • There are 13 steps leading to the gallows.
  • 13 knots in a hangman’s noose.
  • 13 feet which the guillotine blade falls.
  • The driver of Princess Diana hit pillar #13 at Place de l’Alma when she was killed in Paris, France.
  • 13 people, Christ and his 12 disciples, were in attendance at the last supper. This is where the Christian belief ties in, making Friday a believed unlucky day, as the crucifixtion occurred on a Friday.
  • Certain ocean liners will be held in dock until after midnight to appease passenger’s fears on Friday the 13th.
  • British study concluded that even though there were less cars on the road on Friday the 13th (as compared with other Fridays) more accidents were reported.
  • Trisadekaphobia is the technical name for fear of Friday the 13th.
  • Apollo 13, 1970, the 13th mission launched from pad #39 (13 x 3), mission was aborted, after an explosion occurred in the fuel cell of their service module. The rocket had left launcing pad at 13:13 CST and the date was April 13th.
  • Epluribus Unum has 13 letters.
  • The US Seal has 13 stars, bars, feathers in the eagle’s tail, 13 bars in one claw, 13 olive branches in the other.
  • A “quatrorzieme” is a professional 14th guest hired by the French who had only 13 guests in attendance for dinner, who felt that was unlucky.
  • A baker’s dozen consists of 13 for a reason! So the story goes a witch near Albany, NY demanded 13 items every time she came in to a particular bakery, and one day the old baker could not afford her extra biscuit. She sneered some strange words at the man, and he suffered terrible luck from then on, until he brought her another 13 rolls. After that life was once again easy for the baker and word spread around town. The custom is still sometimes practiced today.

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