Showing posts with label Life science. Show all posts
Showing posts with label Life science. Show all posts

Thursday, 12 July 2007

The placebo effect

I always fell for it, as a kid. It would be the same routine, i get sick my parents give me something, I thought I was fooling them but it turned out it was the opposite they were fooling me, and then i would say "oh it worked I'm feeling better again". probably miss the smirk on their faces.
I, a child of eight cant understand what tablets for what thinking that as soon as i swallow it it makes me feel way better.
In my later years I did realize that tablets don work as soon as they enter your body, they need time. But i still I feel a bit of relief as soon as a gulp down a pill and say oh alright...
As they say its all in the mind...
And so I'd like to believe.
Placebo to me is a psychological state of mind.
In modern age , the placebo is used by psychiatrists to cure depression. My mom a practising gynaecologist says that for minor problems she usually uses a placebo, the patient dutifully reports back saying all is well, she says she hates it when patients get addicted to drugs which they wouldn't and didn't need in the first place.

there is certainly data that suggest that just being in the healing situation accomplishes something. Depressed patients who are merely put on a waiting list for treatment do not do as well as those given placebos. And -- this is very telling, I think -- when placebos are given for pain management, the course of pain relief follows what you would get with an active drug. The peak relief comes about an hour after it's administered, as it does with the real drug, and so on. If placebo analgesia was the equivalent of giving nothing, you'd expect a more random pattern ("The Placebo Prescription" by Margaret Talbot, New York Times Magazine, January 9, 2000).*


a young Seattle cardiologist named Leonard Cobb conducted a unique trial of a procedure then commonly used for angina, in which doctors made small incisions in the chest and tied knots in two arteries to try to increase blood flow to the heart. It was a popular technique -- 90 percent of patients reported that it helped -- but when Cobb compared it with placebo surgery in which he made incisions but did not tie off the arteries, the sham operations proved just as successful. The procedure, known as internal mammary ligation, was soon abandoned ("The Placebo Prescription" by Margaret Talbot, New York Times Magazine, January 9, 2000)

The idea of a powerful placebo in modern times originated with H K Beecher. He evaluated that over two dozen studies and calculated that about one-third of those studies improved due to the placebo effect.
The placebo effect may be quite harmful and dangerous in serious cases , may even be considered as a quack procedure.

Patients can become dependent on nonscientific practitioners who employ placebo therapies. Such patients may be led to believe they're suffering from imagined "reactive" hypoglycemia, nonexistent allergies and yeast infections, dental filling amalgam "toxicity," or that they're under the power of Qi or extraterrestrials. And patients can be led to believe that diseases are only amenable to a specific type of treatment from a specific practitioner (The Mysterious Placebo by John E. Dodes, Skeptical Inquirer, Jan/Feb 1997).

Saturday, 12 May 2007

Pheromones as Aphrodisiacs

Pheromones are basically body secretions , which effect the organisms olfactory senses even though it is said that these chemicals have no odour thy work in mysterious ways.
One of these so called effects are the dormitory effect. This is when women living in close quarters or in a relationship fall into the same cycle thereby bringing about a synchronity in their menstrual cycle.
Unfortunately since the sense of smell in humans is not that developed pheromones do not play an important role. However it is said that pheromones are the scientific equality of a mythological cupids arrows. In many animals they are powerful sexual attractants. Or so called "turn ons".

Perfume industries have taken advantage of these pheromones and have designed synthetic ones or extracted them from animals and put them in perfumes. Even though they haven't been marketed as any such aphrodisiacs but as mood enhancers to relax and stimulate your senses they still sell.
The scientific community still has to give its final verdict on the pheromones. Are they really lust signals for love?