Not all seizures will cause people to convulse (jerk). There are several types of seizures that occur without jerking. The purpose of this article is to create an awareness about other types of seizures so that people can seek medical help for this commonly misunderstood symptoms.
The manifestation of seizures is dependent on the area of the brain affected and the extent of involvement. Generally, seizures are classified into two main groups – generalized and focal.
Generalized seizures occur when seizures foci occur concurrently on both sides of the brain while focal seizures imply that the seizure occurs from a side of the brain.
Writing this was actually challenging for me. I tried not to include the medical terms for the description of the seizure types, but it was difficult doing this without including the names. But for simplicity purpose, it is important to note that not all seizures are associated with jerking, there could be abnormal sensations, cognitive and psychic manifestations.
Another point is that not all seizures are associated with loss of awareness, people with focal seizures may or may not loose awareness.
Occasionally, people with impairment of consciousness manifest repetitive movements called automatism. These movements include walking, running, vocalization, undressing and aggression if they perceive a threat.

Generalized seizures
Generalized seizures can manifest as:
1. Generalized tonic - clonic seizure: This is the type that is easily recognized by people. It was initially called grand mal seizure. The person suddenly loses consciousness. Sometimes a loud cry is heard at the onset of seizures, with stiffening of the whole body. This is followed by rhythmic jerking of the whole body. This could last about 2-3mins.
2. Tonic seizures - In some people, only the stiffening of the body occur with no jerking. This is the period when the eyes roll up with the teeth clenched.
3. Clonic seizures - In other the rhythmic jerking is the only manifestation seen.
4. Myoclonic seizures – These are very brief jerks lasting a fraction of a second. During myoclonic seizures dropping the object. This is the only generalized seizure with no loss of consciousness here, unlike all the other generalized seizures. The patient can describe what is happening lucidly.

Please read more on http://medicalinfosblog..com.ng/2016/12/types-of-seizures.html#more

CCL Lalasticala