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 'Cross fire' from the brain makes patients tremble

This story is from the category The Brain
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Date posted: 25/07/2008

A typical symptom of Parkinson's disease is tremor in patients. A group of scientists, including Professor Peter Tass from Forschungszentrum J?lich have succeeded in demonstrating the mechanisms which cause the so-called tremor: neuron clusters in the depths of the brain drive the tremor.

Before this work, it was thought that the cause of the tremors was proprioceptive feedback interference, from the muscles around the body. This is not the case. Proprioceptive feedback interference issues do not actually seem to exist, marking a significant piece of welcome news for the development of SimStim and virtual bodies. With the limbs, feedback is fast, instantaneous, and then gone. Only deep in the brain itself, do networks set up in self-repeating loops, driving the tremors.

Instead, the 5-Hz rhythm deep in the brain results from the networks of neurons is disturbed in people suffering from Parkinson's disease. These "fire" their stimuli at the same time thus causing the typical tremor.

See the full Story via external site: www.physorg.com

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