Archive for Health

Attention span

duminică, martie 15th, 2009
Attention span is the amount of time a person can concentrate on a task without becoming distracted.
Most educators and psychologists agree that the ability to focus one’s
attention on a task is crucial for the achievement of one’s goals.
 

Length of the span

Attention span varies with age, with older children capable of longer periods of attention than younger children.[1]
The type of activity is also an important consideration, as people are
generally capable of a longer attention span when they are doing
something that they find enjoyable or intrinsically motivating.

Estimates for the length of human attention span are highly variable
and range from 3 to 5 minutes per year of age in young children, to a
maximum of around 20 minutes in adults.[2]
Nevertheless, the average movie lasts approximately two hours, and most
adults can follow the plot with only minimal lapses of attention.

Continuous attention span, or the amount of time a human can focus
on an object without any lapse at all, is very brief and may be as
short as 8 seconds.[3]
After this amount of time, it is likely that an individual’s eyes will
shift focus, or that a stray thought will briefly enter consciousness.
Fortunately, these short lapses are only minimally distracting and do
not tend to interfere with task performance.

Bookmark: Effects_of_temperament

[edit] Effects of temperament

In an early study of attention span, the mothers of 232 pairs of
twins were interviewed periodically about the similarities and
differences in behavior displayed by their twins during infancy and
early childhood. The results showed that each of the behavioral
variables (temper frequency, temper intensity, irritability, crying,
and demanding attention) had a significant inverse relationship with
attention span. In other words, the twin with longer attention span,
who was better able to remain absorbed in a particular activity without
distraction, was also the less temperamental twin.[4]

Bookmark: Historical_differences

[edit] Historical differences

The attention span of humans is apparently much shorter than it used to be. Neil Postman discusses this in his book, Amusing Ourselves to Death. One of his examples is the Lincoln-Douglas debates of 1858. These lasted for hours in front of a sustained audience, whereas modern debates do not approach that length.[5]

The instant gratification
made possible by modern technology appears to have had a detrimental
effect on attention span. One study of 2600 children found that early
exposure to television (around age two) is associated with later
attention problems at age seven.[6][7]
Internet browsing may have a similar effect because it enables rapid
viewing. Most internet users spend less than one minute on the average
website.[8]
It may be wise for parents to limit television and internet use in
children and encourage them to read books instead. A gradual
progression to longer books could be an effective way to develop a
healthy attention span.

Bookmark: See_also

[edit] See also

Bookmark: References

[edit] References

  1. ^ Ruff, H. A. & Lawson, K. R. (1990). Development of sustained, focused attention in young children during free play. Developmental Psychology, 26, 85-93.
  2. ^ Wandering attention span Retrieved October 23, 2008.
  3. ^ Wandering attention span Retrieved October 23, 2008.
  4. ^ Wilson, R. S., Brown, A. M., & Matheny, A. P. Jr. (1971). Emergence and Persistence of Behavioral Differences in Twins. Child Development, 42, 1381-1398.
  5. ^ Nunley, K. F. (2004). Keeping Pace with Today’s Quick Brains Retrieved October 23, 2008.
  6. ^ Christakis,
    D. A., Zimmerman, F. J., DiGiuseppe, D. L., & McCarty, C. A.
    (2004). Early television exposure and subsequent attentional problems
    in children. Pediatrics, 113, 708-713.
  7. ^ Editorial from The Washington Times Retrieved October 23, 2008.
  8. ^ BBC article on how the internet affects attention span Retrieved October 23, 2008.

10x to Wikipedia Project

Heart Attack

vineri, martie 13th, 2009

Figure A is an overview of a heart
and coronary artery showing damage (dead heart muscle) caused by a heart
attack. Figure B is a cross-section of the coronary artery with plaque buildup
and a blood clot.

During a heart attack, if the blockage in the
coronary artery isnt treated quickly, the heart muscle will begin to die
and be replaced by scar tissue. This heart damage may not be obvious, or it may
cause severe or long-lasting problems.

Severe problems linked to heart attack can include heart
failure
and life-threatening arrhythmias (irregular heartbeats). Heart failure is a condition in which
the heart cant pump enough blood throughout the body. Ventricular
fibrillation is a serious arrhythmia that can cause death if not treated
quickly.
 
 

Get Help Quickly

Acting fast at the first sign of heart attack
symptoms can save your life and limit damage to your heart. Treatment is most
effective when started within 1 hour of the beginning of symptoms.

The most common heart attack signs and symptoms
are:

  • Chest discomfort or painuncomfortable
    pressure, squeezing, fullness, or pain in the center of the chest that can be
    mild or strong. This discomfort or pain lasts more than a few minutes or goes
    away and comes back.
  • Upper body discomfort in one or both arms, the
    back, neck, jaw, or stomach.
  • Shortness of breath may occur with or before
    chest discomfort.
  • Other signs include nausea (feeling sick to your
    stomach), vomiting, lightheadedness or fainting, or breaking out in a cold
    sweat.

If you think you or someone you know may be having a
heart attack:

  • Call Local Emergency Number within a few minutes5
    at the mostof the start of symptoms.
  • If your symptoms stop completely in less than 5
    minutes, still call your doctor.
  • Only take an ambulance to the hospital. Going in
    a private car can delay treatment.
  • Take a nitroglycerin pill if your doctor has
    prescribed this type of medicine.

Outlook

Each year, about 1.1 million people in the United
States have heart attacks, and almost half of them die. CAD, which often
results in a heart attack, is the leading killer of both men and women in the
United States.

Many more people could recover from heart attacks if
they got help faster. Of the people who die from heart attacks, about half die
within an hour of the first symptoms and before they reach the hospital.

What Is a Heart Attack?

A heart attack occurs when blood flow to a section
of heart muscle becomes blocked. If the flow of blood isnt restored
quickly, the section of heart muscle becomes damaged from lack of oxygen and
begins to die.
Heart attack is a leading killer of both men and
women in the United States. But fortunately, today there are excellent
treatments for heart attack that can save lives and prevent disabilities.
Treatment is most effective when started within 1 hour of the beginning of
symptoms. If you think you or someone youre with is having a heart
attack, call emergency right away.

Overview

Heart attacks occur most often as a result of a
condition called coronary artery disease (CAD). In CAD, a fatty material called plaque
(plak) builds up over many years on the inside walls of the coronary arteries
(the arteries that supply blood and oxygen to your heart). Eventually, an area
of plaque can rupture, causing a blood clot to form on the surface of the
plaque. If the clot becomes large enough, it can mostly or completely block the
flow of oxygen-rich blood to the part of the heart muscle fed by the artery
 
10x to nhlbi

Watch out – simptoms of brain stroke

joi, martie 12th, 2009
Reading a paragraph can help you save lives.
This is how pieces of knowledge make us better.
After you go through this article, you will know the:
The Effects of Brain Strok
"Your
brain has three main components – the cerebrum (which consists of the
left and right cerebral hemispheres), the cerebellum, and the brain
stem. The cerebral hemispheres of the brain make up the largest part of
your brain. The cerebellum is the structure located behind the brain
stem, and the brain stem is the lowest section of the brain and is
connected to the spinal cord.
 
 
 
Region of the Cerebrum Damaged by Stroke Signs and Symptoms
Wernicke’s area (central language area) Difficulty
speaking understandably and comprehending speech; confusion between
left and right; difficulty reading, writing, naming objects, and
calculating
Broca’s area (speech) Difficulty speaking and, sometimes, writing
Parietal lobe on the left side of the brain Loss of coordination of the right arm and leg
Facial and limb areas of the motor cortex on the left side of the brain Paralysis of the right arm and leg and the right side of the face
Facial and arm areas of the sensory cortex Absence of sensation in the right arm and the right side of the face
Optic radiation Loss of the right half of the visual field of both eyes

"
When you are near a pearson and he is not behaving as usual, following the above simptoms list, you can understand better if he/she just had a stroke.
Let’s hope this table will be only new info for you and you’ll never need to make use of he info. Anyway, if you do call very fast the local emergency service and tell them clearly what simptoms you the pearson shows.
 
Oh, and by the way, after a pearson suffer a brain stroke, a brain lesion, that pearson can enter in a recovery program. :)
Anyone interested, just ask and will discuss this issue.
 
info available with thaks to this team

Amazing Brain Facts

miercuri, martie 11th, 2009
  1. Brain imaging studies show that human feelings originate inside the brain.there is much to discuss on this issue, starting with the point that if human feelings have other origins than the human brain – what would be the purpose of the psychiatrists !!
  2. The
    human brain structure is almost fully developed by age 11, though some
    higher self-management brain functions continue to develop into the mid
    20s.
  3. The diameter of an individual brain neuron is 4 microns, meaning 30,000 could fit on the head of a pin.
  4. The human brain has 10 billion neurons, making it the most powerful learning tool in the world.
  5. Each
    single brain neuron has from 1,000 to 10,000 connections with other
    neurons, making up to 10 trillion neuron connections possible.
  6. Alcohol interferes with brain processes by weakening connections between neurons.
  7. The same part of the brain interprets both your physical and emotional pain.
  8. Stress over long periods can weaken the brains ability to learn and remember.
  9. A dogs brain is 19 times smaller than a human adult brain; an elephant s brain 4 to 5 times bigger than ours.
  10. An adult bottle-nosed dolphins brain is about the size of a human adults brain
  11. The average adults brain weighs 3 to 4 lbs. but consumes 20% of the bodys supply of oxygen .
  12. Loss of oxygen for even 5 to 10 minutes can cause serious brain damage.
  13. Our brain requires 20% of the entire bodys blood flow.
  14. The human brain contains 400 miles of blood vessels.
  15. Brain
    imaging functional MRI equipment measures blood flow and provides a
    picture of brain activity during actual emotional experiences.
  16. There
    is no sense of pain within the brain itself. This allows neurosurgeons
    to probe areas of the brain while the patient is awake .
  17. A living brain is so soft you could cut it with a butter knife.
  18. Brain messages travel between neurons in just one thousandth of a second.
  19. Each time you have a new thought or memory, a new brain connection is made between two or more brain cells.
  20. Your brain generates up to 25 watts of power while you’re awake—enough to illuminate a light bulb.

facts partially true thanks to coping with kids

 

Violent games transform societies rules

luni, martie 9th, 2009

Watching media violence significantly increases the
risk that a viewer or video game player will behave aggressively in
both the short and long term, according to a University of Michigan
study published today in a special issue of the Journal of Adolescent
Health.

The study, by L. Rowell Huesmann, reviews more than half a century
of research on the impact of exposure to violence in television,
movies, video games and on the Internet.

The research clearly shows that exposure to virtual violence
increases the risk that both children and adults will behave
aggressively, said Huesmann, the Amos N. Tversky Collegiate Professor
of Communication Studies and Psychology, and a senior research
scientist at the U-M Institute for Social Research (ISR).
 
 

In his article, Huesmann points out that U.S. children spend an
average of three to four hours a day watching television. More than 60
percent of television programs contain some violence, he said, and
about 40 percent of those contain heavy violence.

Children are also spending an increasingly large amount of time
playing video games, most of which contain violence. Video game units
are now present in 83 percent of homes with children, he said.

According to research conducted by Huesmann and ISR colleague Brad
Bushman, media violence significantly increases the risk that both
children and adults will behave aggressively.

How significantly?

Exposure to violent electronic media has a larger effect than all
but one other well-known threat to public health. The only effect
slightly larger than the effect of media violence on aggression is that
of cigarette smoking on lung cancer, Huesmann said.

Our lives are saturated by the mass media, and for better or worse,
violent media are having a particularly detrimental effect on the
well-being of children, he said.

As with many other public health threats, not every child who is
exposed to this threat will acquire the affliction of violent behavior.
But that does not diminish the need to address the threat as a
society and as parents by trying to control childrens exposure to
violent media to the extent that we can. The reading is clearly
indebted to the authors piagetian concepts about psychosocial
development. But even in the light of a Vygotskian zone of proximal
development, narrative constructivism or REBT, the social consequences
of these findings would not be any less concerning.

 10x to huehueteotl

Knowledge is good, but good usage of knowledge is better

miercuri, martie 4th, 2009

During our life we are obliged by the society to invest between 4 – 12 /16 – 20 years into learning sistems.

 
But, that is a counter-productive attitude. Why? here is why:
A. everything we learned as in childhood 0-6/7 year will dominate our livesin the next years
 
B everything that we learn afterthat is not acquired on same principles
 
period A is fun, entertaining = happy training
everything that we learn while in a positive/ happy state is something that will be remembered for more time than things learned in a indiferrent state
period B is not the best way to promote learning and memory because you are confined in a space for 6-8 hours maybe more and most of the teachers forget their purpose in class = to make all information pleasent and understandable
 
anyway, there are lots of culture that promote ideas known from ancient times which can be put in one phrase = it doesn’t really matter what you do with a kids

Right half of brain & Left half of the brain

duminică, februarie 1st, 2009
A nice researcher, doctor, Neuroanatomist Jill Bolte Taylor studies the behaviour of the brain. One day, more precise, one morning she suffers a stroke. And she has the interesting oportunities of studying the brain behaviour upon herself.
 
Here is a video file in wich doctor Taylor shows us how she handled the situation.

Remember one thing: this person is a highly respected doctor. She talks about a set of experiences wich are also described by the people which ingest halucinogenous substances. The same experiences are described by students of different more or less esoteric systems.

With other words the level of understanding doctor Taylor reached can be reched without the "brain stroke" factor. And, btw she had 8 years with damge untill she finally recovered.

child learning and behaviour

sâmbătă, noiembrie 1st, 2008
Please watch this video very closely.
And try not to think:
Those poor kids, ah well good thing it’s not about me!

enjoy & send this message to all the people you know, parents or not, they must understand the implications of their acts upon the young ones.

ADHD – teorie si practica

vineri, mai 9th, 2008
ADHD is a disorder that affects both adults and children charicterized
by the lack of ability to filter out irrelevance, focus on things, and
prioritize in general. Though it seems to have relatively obvious
symptoms, in young children it can often be quite difficult to
diagnose.

Some forms of ADHD have a hyperactivity component, increasing
the likelihood of reacting based on impulsiveness, and an inability to
regulate their own activity. Non-hyperactive, or inattentive ADHD can
experience just as negative a range of symptoms stemming from an
inability to filter information correctly. You can end up with a child
who’s attention is demanded equally by their teacher, and the growing
grass.

These styles of activity, in general, are quite normal for
adolescents, and so it is a surprise to many when a pediatrician may
suggest further testing for ADHD. Children with ADHD tend to exhibit an
extreme version of the natural tendencies of children without the
condition. In addition the behavior will not develop at a normal pace,
and so outgrowing a phase is not often the best solution.

In other words, it’s very difficult to know if a child is suffering
from ADHD based on casual observation alone. In fact, it can be
difficult to diagnose even with the most sophisticated psychological
measures we currently have available to us. There is no blood test or
diagnostics to determine if someone has ADHD – it’s a mental condition,
not a noticeable physical problem or disease.

It is common in a situation such as this for a parent to question
whether or not ADHD even exists, or is a figment of the psychological
field’s (sometimes fertile) imagination. But beyond it’s difficulty to
diagnose in kids, it is one of the most well established mental
conditions on the diagnosable map today. Due to its association with
young children, a great deal of attention (no pun intended) has been
paid to the subject, and study after study confirms that ADHD is a
biological, brain-based condition

 
10x http://www.adhdnet.net/

Stress in Dairy Cattle causes Changes in Respiration & Heart Rates Body Temp Plasma Lactic Acid Levels & Plasma Creatinine Level

duminică, aprilie 27th, 2008

Changes in Respiration and Heart Rates, Body Temperatures, Plasma
Lactic Acid Levels and Plasma Creatinine Levels Caused by Stress in
Dairy CattleBookmark: RFN11, 2Bookmark: RFN2,


G. C. GrafBookmark: RFN33 and
W. E. Petersen


Department of Dairy Husbandry, University of Minnesota , St. Paul
 

ABSTRACT

Conceivably, one of the factors involved in milk production is the ability of the animal to adjust itself to a changing environment, and differences in levels of production between animals can in part be attributable to differences in abilities to make environmental adjustment. It is also to be expected that with a fuller knowledge of the effect of environmental factors upon levels of production more favorable conditions can be provided. This report deals with observations on the effects of low ambient temperature, exercise, intermittent electrical shock, adrenaline injections, dehorning, and parturition upon rectal temperature, respiration and heart rates, and plasma lactic acid and creatinine levels.

Gaalaas (9), Kibler and Brody (11), Rhoad (17), and Seath and Miller (19) have reported increased respiration rates with increases in environmental temperatures. Kelly and Rupel (10) and Seath and Miller (18) noted increased respiration rates with increases in relative humidity. Kibler and Brody (11) noted a progressive decrease in respiration rate of 10 to 15 per minute when temperatures were gradually dropped from 50 to 5 F.


FOOTNOTES

1 Scientific Journal Series Paper No. 2982, Minnesota Agricultural Experiment Station.

2 The data published in this paper have been taken from a thesis presented by the senior author to the Graduate School, University of Minnesota, in partial fulfillment of the requirements for the Ph.D. degree, August 1951.

3 Present address: Department of Dairy Husbandry, Virginia Polytechnic Institute, Blacksburg.

 

Journal of Dairy Science Vol. 36 No. 10 1036-1048

1953 by American Dairy Science Association  
10x http://jds.fass.org/cgi/content/abstract/36/10/1036?ck=nck 
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