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How a pain in the neck could be bad for your blood pressure

A chance discovery in the lab has helped University of Leeds scientists to show how the treatment for a stiff neck could do wonders for your blood pressure.

Chiropractors have long known that tackling pain and stiffness by cracking the neck through manipulation can also lower blood pressure but the reasons were never clear.

Now a team led by Professor Jim Deuchars has examined pathways between the neck and the brain to show how the neck muscles could play a crucial role in controlling blood pressure, heart rate and breathing.

Their study, published in the Journal of Neuroscience, provides the first evidence for a role for these connections in influencing brain regions which control body functions that we don't need to think about, such as breathing and blood pressure.

The area of the brain where the signals from the neck terminate were first identified by Godfather of Neuroscience Ramon Y Cajal, more than 100 years ago, though its function was not understood. What happened after these signals arrived remained a largely-overlooked area of research until new techniques allowed the Leeds team to take the work forward.

Their work began by chance, as Prof Deuchars explained: Cells in the area that receive neck signals jumped out at us when we labelled sections with particular markers. We wanted to know how these cells were organised and the other brain regions to which they were connected.

The team, which includes researchers from Japan and Hungary, found a link between these cells and the nucleus tractus solitarius, an area of the brain that is pivotal in control of autonomic functions - body functions under unconscious control. They propose that nervous signals from the neck could play a key role in ensuring that adequate blood supply is maintained to the brain as we change posture, such as from lying down to standing up. Where such signalling fails, we can suffer problems with balance and blood pressure.
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Contact: Simon Jenkins
S.Jenkins@leeds.ac.uk
44-011-334-34031
University of Leeds
1-Aug-2007


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