title: [ln search of the sharp wave of epileptic nature].
abstract: BACKGROUND
  Proper identification of the EEG patterns is the basic stage of objective evaluation of EEG records.
  
  
  OBJECTIVE
  This paper is concentrated on the usefulness of contemporary analytical methods in rational evaluation of the distribution of brain electrical potentials recorded in routine, 10-20 system of electrode placement.
  
  
  METHODS
  The paper illustrates results of analysis of the EEG records in a person with suspicion of existence of the state of nonconvulsive status epilepticus. The EEG was recorded using sampling frequency 250 Hz, with time constant 0.3 s, low pass filter 70 Hz and notch filter on.
  
  
  CONCLUSIONS
  The results illustrate advantages of the methods of imaging distribution of the brain electrical potentials during evaluation of EEG records as well as possible limitations resulting from the difficulties in obtaining reasonable basic set of data representing true spatial distribution of EEG patterns in basic montage.
authors.forename: Aleksander
authors.initials: A
authors.lastname: Sobieszek
mesh_terms: D000368:Aged; D058256:Brain Waves; D004569:Electroencephalography; D006801:Humans; D013226:Status Epilepticus / Q000503:physiopathology*