Many times when you are sitting in the same position for
an extended amount of time you may get a "pins and needles" sensation. Perhaps you have
sat with your legs crossed for too long or slept on your arm too long overnight. Many
times when this happens it is because the communication between the brain and that part
of the body has been cut off. Because of the pressure that is placed on the nerves, they
are unable to transmit impulses correctly. The tingling sensation is also a way that our
bodies tell us that we need to change our positions.
Nerve impulses carry sensation information from
nerve endings in the body to the brain, as well as instructions from the brain to the
parts of the body. When you interfere with this transfer by squeezing the nerve
pathways, you don't have full feeling in that body part, and your brain has trouble
telling the body part what to
do.
In addition to this,
blood supply has been cut off a bit because of the pressure placed on the body
part.
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