No. Seizures can be 'grand mal' which involve the tonic-clonic muscle movement you describe as convulsions. 'Petit mal' seizures can be absence seizures, most often seen in children, where the patient seems catatonic for a brief period.
Partial seizures can involve only one small body area, and some seizures consist of just a recurrent tic which can evolve into a larger seizure.
Even a hiccup is believed to be a type of mild seizure.
During an epileptic seizure a person can have convulsions. There are different types of seizures, not all involve convulsions.
Convulsions/seizures
There are several types of convulsions, primarily categorized into two main groups: generalized and focal. Generalized convulsions affect both sides of the brain and include types like tonic-clonic seizures, absence seizures, and myoclonic seizures. Focal convulsions, on the other hand, originate in one specific area of the brain and can manifest as simple partial seizures or complex partial seizures. Each type varies in symptoms and duration, reflecting different underlying neurological conditions.
convulsions/seizures
convulsions/seizures
Convulsions/seizures
convulsions/seizures
Convulsions/seizures
Anticonvulsant drugs are medicines used to prevent or treat convulsions (seizures).
The types of seizures often change. In most cases, the drop seizures subside. They are replaced by partial, complex partial, and secondarily generalized convulsions.
Chemical
Epilepsy - a brain disorder in which a person has repeated seizures (convulsions) over time.