Scientists have discovered that certain brain areas responsible for facial movements may reorganize after Botox injection combined with facial exercises.

Bell´s palsy is a disorder that causes facial muscles to weaken or become paralyzed due to trauma to the cranial nerve and sometimes associated with pregnancy or a virus infection. Until recently, its cause was unknown in most cases, but it has now been related to Lyme disease and Herpes simplex. This condition is not permanent but can strike anyone at anytime. Older people are more likely to suffer from Bell´s palsy  although children can have this conditions as well but  they tend to recover well from it. It was described by a Scottish surgeon Charles Bell, 200 years ago.

Researchers found that the injection of Botox significantly reduced facial drooping and improved control functions. These changes were associated with changes in brain activity in the affected motor cortex and in brain organization to adapt the portion of the brain controlling facial movements.

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