Spasticity is curable now, as the U. S. Food and Drug Administration, approved of Allergan Inc.'s Botox to treat the same. Spasticity is very common after a stroke, brain injury, according to FDA. Botox blocks connections between nerves and muscles, momentarily paralyzes the spastic muscle.

However, this treatment is not an alternative to the physical therapy or other rehabilitative care.

Spasticity in the flexor muscles of the elbow, wrist and fingers can be treated by Botox, as it relaxes blocked nerve impulses to certain muscles.

It was earlier used to treat wrinkles between the eyebrows, but is now clinically approved to treat unrestrained muscle contractions of the neck and shoulder muscles and unnecessary underarm sweating.

Its use may give birth to fatal breathing and swallowing problems, when the effects of the toxin go beyond the area where it was inserted.

But FDA assured that the problems like the unwanted spread of the toxin occurred only during off-label use of the product in children, who are getting treatment for cerebral palsy-related limb spasticity.

The agency also added that Botox is not safe as far as treating the other upper limb muscles, or legs are concerned.