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Re: clonus
Posted By CCF Neuro MD on January 15, 1998 at 10:15:17:

In Reply to: clonus posted by roo on January 14, 1998 at 13:30:27:

: I recently developed clonus in both calves.  It seemed to come on suddenly.  A friend, who is a doctor, verified this..  My question is this... What are some of the more common causes of clonus?  Is it something to be worried about.  I've had it know for several months, and it's not getting any better.  It's worse if anything.  I've seen 3 neurologists who tell me to just ignore it.  I've looked on the web, but I can't seem to find what causes it.  Thanks

Clonus is a very unusual phenomenon to be reported as a symptom, it is
usually only discovered by the examining physician and consists of a
repetetive sustained full scale contraction of the calf muscle which
occurrs when the foot is briskly jerked upwards at the ankle.
If it is a strong enough sign the clonus will continue indefinitely.
Clonus is usually accompanied by very brisk reflexes and is
associated with damage to the nerve pathway between the brain
and the level at which the peripheral nerve leaves the spinal cord.
If both legs are involved the spinal cord is the most likely
location for the problem, a frequent cause for this would be
tightening of the spinal canal (stenosis ) due to disc disease.
If this really is the case you should have an MRI scan of the spinal cord, at the very least.

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