This is an issue that deserves attention, as research examining iron levels in Americans shows that more people have iron levels that are considered too high, than levels that are deficient. In one study of more than 1,000 people, only 3 percent were iron deficient, but 13 percent had iron overload. 1. What are the Health Risks of Too Much Iron?
Clonus is a sign of certain neurological conditions, particularly associated with upper motor neuron lesions involving descending motor pathways, and in many cases is, accompanied by spasticity (another form of hyperexcitability).
Spasticity is characterized by increased muscle tone (hypertonicity) and by muscle stiffness. Symptoms associated with spasticity include the following: 1  increased muscle stretch reflexes. 2  involuntary contraction and relaxation of muscles (spasms). 3  prolonged muscle contractions (dystonia).escription. Spastic muscles are resistant to the normal stretching that occurs during use and may remain contracted for long periods. Spasticity may not be present all the time and varies based on initial muscle tone; length of responding muscle groups; and the person's position, posture, and state of relaxation.