Table 1.

Overview of demographic and clinical characteristics of the patients who suffered from TCS during video‐EEG monitoring who were included

Demographic parameters	Category	N	Percent
Sex	Female	17	53.1
	Male	15	46.9
Epileptogenic zone	Temporal	17	53.1
	Frontal	4	12.5
	Parietal	1	3.1
	Hemispheric	2	6.3
	Multifocal	2	6.3
	Generalized	6	18.8
Etiology	Unknown	11	34.4
	Genetic/idiopathic generalized	6	18.8
	Hippocampal sclerosis	4	12.5
	Disorders of cortical development	6	18.8
	Benign tumor	2	6.3
	Postinfectious	2	6.3
	Vascular	1	3.1
TCS types	Type I—bilateral symmetric tonic arm extension	4	10.3
	Type II—clonic without tonic extension	2	5.1
	Type III—asymmetric or bilateral tonic arm flexion	33	84.6
Wake state	Asleep	20	51.3
	Awake	19	48.7
Postictal EEG	Alpha	2	5.1
	Diffuse slowing	19	48.7
	PGES	17	43.6
	Undeterminable due to artifacts	1	2.6

The different TCS subtypes were recently defined by Alexandre et al.17

Type I: Typical tonic‐clonic seizure with bilateral and symmetric tonic arm extension at the onset of secondary generalization, followed by bilateral and symmetric 4‐limb myoclonic jerk.

Type II: Clonic seizure with bilateral and symmetric 4‐limb myoclonic jerks without tonic arm extension or flexion.

Type III: Tonic‐clonic seizure with asymmetric bilateral tonic arm extension, unilateral tonic arm extension combined with contralateral tonic arm flexion, bilateral tonic arm flexion, or unilateral tonic arm extension, followed by bilateral and symmetric 4‐limb myoclonic jerks and TCS in which the onset was not clear due to blankets covering the camera view, etc.