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New neural pathway controlling skeletal development discovered
Date:9/4/2012

Jerusalem, Sept. 3, 2012 Researchers at the Hebrew University of Jerusalem have discovered that a neuronal pathway -- part of the autonomic nervous system -- reaches the bones and participates in the control of bone development.

The newly discovered pathway has a key role in controlling bone density during adolescence, which in turn determines the skeletal resistance to fracture throughout one's entire life, say the researchers. They emphasize that understanding the mechanisms connecting the brain and the bones could have implications for possible future therapies to better deal with osteoporosis and various neural disorders.

The findings of the Hebrew University team are published this week in the American journal PNAS (Proceedings of the National Academy of Sciences).

Participants in the project were researchers from the Hebrew University's Bone Laboratory, headed by Prof. Itai Bab, in collaboration with Prof. Raz Yirmia, the head of the Laboratory for Brain and Behavioral Research, plus research students Alon Bajayo and Vardit Kram and master's students Arik Bar and Marilyn Bachar. Additional collaborators were Dr. Adam Denes from the University of Manchester, UK, and Prof. Alberta Zallone from the University of Bari, Italy.

The autonomic nervous system, by which the brain monitors and regulates the physiological functioning of the internal organs, includes two subsystems, called "sympathetic" and "parasympathetic." Each of these subsystems has its own, distinct neural pathways. In general, the sympathetic nervous system is perhaps best known for mediating the neuronal and hormonal responses to stress. The sympathetic pathway, on the other hand, generally works to promote maintenance of the body at rest.

Previous studies by the Hebrew University researchers and others showed that the sympathetic nervous system reaches the skeleton and slows down bone development. On the other hand, until now, th
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Contact: Jerry Barach
jerryb@savion.huji.ac.il
972-258-82904
The Hebrew University of Jerusalem
Source:Eurekalert  

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New neural pathway controlling skeletal development discovered
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