People are cloned for organ harvesting in “Parts: The Clonus Horror,” a 1979 sci-fi and horror movie filmed in Simi Valley and nearby cities.

Clonus, a rhythmic movement of your foot and ankle, is an early symptom of neurologic conditions. If you have clonus during pregnancy, it usually means you have severe preeclampsia, a serious ...

Medically reviewed by Brigid Dwyer, MD Clonus is an abnormal reflex response that produces involuntary, repetitive, and rhythmic muscle contractions when a muscle is stretched. This abnormal ...