Here is something about chakras, that I've learned. My background is in "mind yoga", a simplified yoga system which is based on the core principles of yoga science. There are lots of different places for chakras and descriptions of what they do and stand for, depending on what system you use. The system I've learned and use is based on the concept: how to make it easier for others to learn how to "place thought" and to observe how others "place thought" in their bodies." I just want to mention that basically only simple is practical and works in real life (atleast in my experience).    

From the top down:
Desire (the area above your head)
Existance (the area of the top of your head)
Life (the area above your eyebrows)
Nourishment (the area of your throat)
Heart (the area of your chest)
Power (the area of your kidneys. The area between sternum and navel also)
Sex (the area of your genitals)
Body (the area of your bottom and coccyx)

When you place thought into these areas you signal to others (and experience the emotion) what these areas are named for.  

I've spent relatively much time to explore waking up these chakras and based on this exploration experience the above "chakra map" is very useful and practical.

Thank you, Toumas!
This does give me a general idea on the locations...

Regards
Sachit

I have a friend who used to be a Dr. She said that when she would do surgery, there were little spaces in the body where nothing was.  The heart was the one she talked about the most.
Next to the heart is an open space.
When people have heart transplants, that space is often filled with the different heart.
She said that to her experience, people who had that space filled didn't always survive well.
She swore up and down that the space is the heart chakra.  
She said some other Dr.'s who had read about the chakra system agreed. She also said most would not talk about it.

Thank you, Tourbi!
That was very informative!

Warm Regards
Sachit

In my experience the general idea of the locations is actually enough. I would like to add to my previous post that the basic chakras are closely related to the glands of the body. When you activate a chakra it activates the gland too. For example stimulation of heart chakra stimulates the thymus gland. Stimulating the thymys gland is very beneficial for health.
Stimulating the life center (forehead/the area front of the top of the forehead) stimulates the pituitary and pineal glands. The pituitary is the master gland of life. If you learn to activate these two chakras at once (heart and life) the rest of the chakras will become activated too. I've noticed that it's a short cut to waking up the chakras.

If you meditate my avatar pic (the sun) it will give you an experience how it feels when the life and heart centers wake up.