- Increased tightness of muscle tone. Untreated hypertonia can lead to loss of function and deformity. Treatment is by physical and/or occupational therapy, and in some cases muscle relaxant medication. Injections of botulism toxin (botox) are a recent treatment for chronic hypertonia in cerebral palsy and other disorders. Also known as spasticity.
* * *- h. polycythemica a form of polycythemia without a prominent degree of splenomegaly, but with increased blood pressure.
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* * *n.exceptionally high tension in muscles.
* * *hy·per·to·nia (hi″pər-toґne-ə) [hyper- + ton- + -ia] excessive tone of the skeletal muscles, so that they have increased resistance to passive stretching and reflexes are often exaggerated; this usually indicates upper motor neuron injury.
Medical dictionary. 2011.