Rigidity: Involuntary movements alternating with rigidity......usually as a side effects of certain medications!!!!! Hope this helps DrZ
Answered 11/19/2014
3.5k views
Complex: The pyramidal tracts are tracts of nerve fibers that run from the brain to the brain stem or spinal cord to control muscle function in the body. If injured or altered, muscles show spasticity/spasm and weakness/wasting. Injury may be caused by stroke, brain hemorrhage, tumor, infection, inflammation such as from meningitis or multiple sclerosis, or trauma.
Answered 4/22/2017
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