For a full story on sympathectomy and consequences, look up nerve injury or denervation

"I think the surgeons may not be aware of the long term consequences of denervation" Ahmet Hoke M.D., Ph.D. FRCPC

Professor of Neurology and Neuroscience, Director, Neuromuscular Division Johns Hopkins School of Medicine, Department of Neurology


Saturday 25 October 2014

sympathectomy induced morphological alterations in the masseter muscles

Sympathectomized animals showed varying degrees of metabolic and morphological alterations, especially 18 months after sympathectomy. The first five groups showed a higher frequency of type I fibres, whilst the oldest group showed a higher frequency of type IIb fibres. In the oldest group, a significant variation in fibre diameter was observed. Many fibres showed small diameter, atrophy, hypertrophy, splitting, and necrosis. Areas with fibrosis were observed. Thus cervical sympathectomy induced morphological alterations in the masseter muscles. These alterations were, in part, similar to both denervation and myopathy. These findings indicate that sympathetic innervation contributes to the maintenance of the morphological and metabolic features of masseter muscle fibres.

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