Myoclonic seizure can be described as "jumps" or "jolts" experienced in a single extremity or even the entire body. The feeling experienced by the individual is described as uncontrollable jolts common to receiving a mild electric shock. The sudden jerks and twitching of the body can often be so severe that it can cause a small child to fall. A myoclonic seizure (myo "muscle", clonic "jerk") is a sudden involuntary contraction of muscle groups. The muscle jerks consist of symmetric, mostly generalized jerks, localized in the arms and in the shoulders and also simultaneously with a head nod; both the arms may fling out together and simultaneously a head nod may occur. Symptoms have some variability amongst subjects. Sometimes the entire body may jerk, just like a startle response. As is the case with all generalised seizures, the patient is not conscious during the event but the seizure is so brief that the person appears to remain fully conscious. In reflex epilepsies, myoclonic seizures can be brought on by flashing lights or other environmental triggers (see photosensitive epilepsy). Familiar examples of normal<unk>  include hiccups and hypnic jerks that some people experience while drifting off to sleep. Severe cases of pathologic<unk>  can distort movement and severely limit a person's ability to sleep, eat, talk, and walk. Myoclonic jerks commonly occur in individuals with epilepsy. Twitching whiskers in a sleeping cat
Myoclonus
Chorea 
Chorea
Clonus
Opisthotonus
Opsoclonus
Synkinesis
Paratonia