[Somatosensory evoked potentials in panic disorders].

Background: Panic disorders are at present the most intensely studied psychiatric entity calling for a multidisciplinary approach. After promising results following the use of evoked auditory potentials for the first time in panic disorders the somatosensory evoked potential was tested.

Methods And Results: Fifteen patients with panic disorders or agoraphobias or without the latter (12 women, 3 men, average age 33.

[Periodic discharges in clinical electroencephalography].

The authors recorded generalized and focal periodic discharges in 49 EEG tracings from 27 patients aged 5 to 75 years. According to the shape of the waves and their complexes generalized periodic discharges were formed by slow waves, sharp waves or spikes, triphasic waves and periodic activity of the "suppression burst" type. Focal periodic discharges had the shaps of slow waves and so-called periodic lateralized epileptiform discharges.

Reflex epilepsy evoked by specific psychic activity. A case report.

A patient with epileptic seizures and epileptiform EEG abnormalities precipitated by specific type of intellectual activity is presented. Clinical and subclinical epileptic seizures were accompanied by specific EEG discharges--the left parieto-occipito-temporal spike-and-wave complexes with various grade of generalization. On the basis of detailed EEG and activation studies, it is concluded that seizures in this patient were evoked by higher cognitive processes associated with decision making, anticipation and spatial function.

[Theta rhythms and positive bioccipital waves in the EEG during sleep].

Bioccipital theta rhythm and positive occipital sharp waves during sleep were observed in 46 of 192 neurologic patients. The age ranged of the patients between 15-54. The percentual incidence of this pattern (about 24%) was independent on the age.