title: [Ambulatory monitoring of the EEG (A/EEG). Guidelines, methodology and indications].
abstract: BACKGROUND
  Ambulatory monitoring of EEG by means of a cassette recording (A/EEG) allows cerebral electrical activity or other biological signals to be recorded during long periods, not less than 24 hours, with the patient being free to move around in his usual surroundings or in the hospital.
  
  
  METHODS
  The recordings are made using a system of electrodes, recording apparatus and software.
  
  
  CONCLUSIONS
  The A/EEG is useful in the study of various diagnostic procedures, basically in the diagnosis and characterization of epilepsy. It is also useful in presurgical evaluation of patients with drug-resistant epilepsy in whom surgical treatment is being considered. In these cases, the possibility of prolonged monitoring allows some of the patient's crises to be recorded, which is very useful in finding the site of the lesion. It is also useful when studying patients with hypersomnia or disorders of the wakefulness-sleep cycle. It is complementary to multiple sleep latency tests (TLSM) and polygraphic recordings of nocturnal sleep, since it allows the quantity, duration and type of sleep to be recorded during prolonged monitoring for more than 24 hours.
authors.affiliation: Servicio de Neurofisiología Clínica, Hospital Universitario La Paz, Madrid, España.
authors.forename: M L
authors.initials: ML
authors.lastname: Espinosa
authors.forename: R
authors.initials: R
authors.lastname: García
authors.forename: C
authors.initials: C
authors.lastname: Padrino
authors.forename: A
authors.initials: A
authors.lastname: Rodríguez
mesh_terms: D000553:Ambulatory Care; D002985:Clinical Protocols; D004569:Electroencephalography / Q000295:instrumentation*; D004827:Epilepsy / Q000175:diagnosis; D006801:Humans; D012893:Sleep Wake Disorders / Q000175:diagnosis
vernacular_title: Monitorización ambulatoria del EEG (A/EEG). Directrices, metodología e indicaciones.