PSG-studies with data record in telemetric mode into PC's memory or with autonomous record of registered data onto the memory card of a patient transceiver-recorder (Holter type monitoring) The following parameters can be recorded: Abdominal respiration effort Thoracic respiration effort Respiratory airflow Snoring ECG Oxygen saturation (SpO2) Body position Psychophysiological telemetric system "Rehacor-T" and software "Encephalan-PSG" ("basic" variant) simple and reliable instrument for various sleep physiological dysfunctions screening.