Table 1.

Evaluation of Treatment and Outcomes for Four of Six Patients Suffering Seizures.

	Indication for DBS	Onset of seizures	Semiology	Inter ictal EEG	Ictal EEG	Stimulation parameters at onset of seizures	Fate of DBS
Patient 1	Poststroke pain (Haemorrhagic stroke on the right)	12 months	Affective seizure (Psychic aura) and Speech arrest Brought on by rapid ramping of stimulation	Intermittent, infrequent sharp transients over the frontocentral regions.	Symmetrical frontal delta wave activity in long runs	3.5 mA 130 Hz 450 mics	Discontinued but felt to be worthwhile even at low settings
Patient 2	Poststroke pain (Right side stroke)	24 months 2 GTC seizure with suprathrehold stimulation in immediate postoperative period.	Loss of awareness with lip smacking (Automotor seizures) Two generalized tonic clonic seizures reported	Fast activity is prominent over the vertex	No electrographic change	8 mA 130 Hz 450 mics	Discontinued
Patient 3	Postsurgical pain on the right following Spinal surgery for syringomyeila	12 months	Left arm tonic seizures with speech arrest Minor jerks in the left leg sometimes (Left leg myoclonic seizures)	Sharp transients are noted intermittently, maximal over both frontal regions, and occasionally focal in the right superior frontal area	No electrographic change	6 mA 130 Hz 450 mics	Discontinued, then resumed (patient request) Following management of seizures. Discontinued again following seizure recurrence
Patient 4	Whole spine pain‐failed back surgery	20 months	Dialeptic (Behavioural arrest with loss of awareness) seizures with secondary generalization (generalized seizures are nocturnal)	Sharp wave discharges are seen across the fronto‐central mid‐line with right sided emphasis	Rhythmical, symmetrical 6 Hz theta slow wave activity across the fronto‐central regions that increments in amplitude and slows in frequency before ending abruptly	5V 130 Hz 450 mics	Discontinued, then resumed (patient request) Following management of seizures. PC&S device (see later in text) implanted.