Ictal non-forced grasping behaviour.

Our aim was to investigate whether patients with epileptiform foci in the frontal lobe, as revealed by video EEG (VEEG) analysis, exhibit non-forced grasping behaviour and manipulatory movements during seizures. We retrospectively reviewed ictal videotapes of 30 consecutive patients with frontal and 30 with temporal lobe epilepsy undergoing VEEG for the presence and type of grasping and manipulatory movements. Four of the 30 patients with frontal lobe epilepsy (13%) showed unilateral grasping behaviour, three of whom had whole hand prehension (one with manipulation movements as well) and one pinching movements. In all patients, arm abduction and elevation resembling reaching invariably preceded grasping hand movements. The epileptogenic focus was located in the contralateral and ipsilateral frontocentral region in two and one patient, respectively, and in the ipsilateral orbitofrontal region in another. However, none of the patients with temporal lobe epilepsy showed grasping behaviour. Patients with frontal lobe epilepsy may show non-forced grasping with or without manipulatory finger movements as part of ictal phenomena.