The Safety Pin cycle
From a very simple perspective, this is how the brain controls the body.
(Called the "Safety Pin" because it looks like a safety pin. Well it did to someone and the name
stuck. Must have been a late night or something!)
this by generating an electrochemical impulse in a nerve which
ultimately reaches the tissue cells needing to be activated.
(Motor Nerve) The tissue responds to the stimulus and does
whatever it is designed to do. For instance if the cells are part
of a muscle, then they will contract. If they are part of a gland,
they will secrete the juices of that gland, if it is the stomach, it
will secrete acid and enzymes designed to break down food.
This activity with in the tissues so stimulated, will activate
sense organs embedded in the tissue and when they reach a
threshold of excitement, will stimulate a Sensory Nerve into
activity which will transmit an signal back to the brain which will
tell the part of the brain receiving this information that some
change has taken place and the amount of that change. Other
impulses coming to the brain will also let it know how much
breakdown there is in the food of the stomach, as well as the
degree of motion in the stomach - how much mixing there is
The brain then decides to do one of 2 things.
1 There is still need for more activity in the end organ
In which case it sends more signals down the Motor Nerve.
2 The job is complete.
No more nerve impulses are generated and the end organ
(Stomach, gland or muscle etc can resume its normal resting
Sounds simple doesn't it?
Now imagine for a bit that there are an average of 100 billion neurons in the human brain and
each of those connects with between 600 and 10,000 other neurons (200,000 in the
cerebellum) (1) that does a lot of our automatic co-ordination. When the nerves are busy they
can each fire off signals at a rate of a maximum is 500-600 times/second. Lets say they all fire
up at once for only 1 second only we then get:
"If you don't use it you lose it."
The same is true if for some reason you can't use it.
Oddly enough it is
one of the jobs of the chiropractor to ensure that your nerves don't
stimulate all parts of the nervous system.
The next thing we do is to limit the wear and tear on the joints as the subluxation process causes
a diminishing of the firing rate of nerves by up to 60%.This is why chiropractors seem to have this
love of playing with bones. It is actually not the bones we are interested in so much, but rather the
proper functioning of the nerves. It is for this reason I get you patients to exercise with cross crawls
and standing on 1 leg throwing balls. It is fun to some, a chore to others and a boring refusal to
perform to others. But think of it as you helping to keep your nerves in trim condition. Than is why
you would want to make it a family craze that spreads to your friends in the school yard and the gym.
It is not so strange. Just watch the early morning walkers. They have their weights and their ipods
and away they go in rhythm to god knows what. The important thing is you are not alone. Ok you
can do it in the privacy of your lounge room back yard or hallway.
"Many of the sensory neurons of the enteric brain are mechanoreceptors, which – if activated –
trigger among other responses, important neuroendocrine changes. These include a change in
the production of serotonin – an important cortical neurotransmitter 90% of which is created in
the belly – as well as other neuropeptides, such as