Erm...
"A seizure is the physical findings or changes in behavior that occur after an episode of abnormal electrical activity in the brain." and
Convulsions are when a person's body shakes rapidly and uncontrollably. During convulsions, the person's muscles contract and relax repeatedly.

The term "convulsion" is often used interchangeably with "seizure," although there are many types of seizures, some of which have subtle or mild symptoms instead of convulsions. Seizures of all types are caused by disorganized and sudden electrical activity in the brain."
www.nlm.nih.gov/medlineplus/ency/article/000021.htm
www.nlm.nih.gov/medlineplus/ency/article/003200.htm

Convulsions tend to be major - in as much as you notice them. Seizures are often barely noticed.

Thicko.
( chickenlady b3ta's very own Elizabeth Taylor, Wed 1 Sep 2010, 13:24, 2 replies, latest was 16 years ago)

I'm just going to stick with "twitches" then.

( Lampito rise with the moon, go to bed with the sun, Wed 1 Sep 2010, 13:27, Reply)

I generally like to get my information about the meanings of words from dictionarys
not medical websites
dictionary.reference.com/browse/seizure
(PsychoChomp, Wed 1 Sep 2010, 13:30, Reply)

*Points and laughs*

( chickenlady b3ta's very own Elizabeth Taylor, Wed 1 Sep 2010, 13:38, Reply)

If you persist with chopping logic in such a cack handed manner and calling people "thicko"...
...Then sooner or later either chickenlady, Al or Enzyme will make minced-meat out of you.

/personal experience.
(Bicycle Repairman "you're also a bit of a wanker", Wed 1 Sep 2010, 13:46, Reply)