[Electroencephalographic findings in preterm neonates].

Background: The electroencephalogram (EEG) in the newborn period is highly superior to the clinical exam in the detection and prognosis of brain dysfunctions, since it allows continuous functional documentation of the brain at the patient's bedside in a non-invasive way. However, there is still some disagreement about these findings.

Objective: To describe the electroencephalographic findings in newborns with a history of prematurity.

Neurophysiological findings of auditory evoked potentials in infants with a history of prematurity.

Background: Auditory evoked potentials (AEPS) constitutes the most commonly used neurophysiological test to assess the functional development of the auditory brainstem in infants and allows the evaluation of hearing for high frequencies.

Methods: An observational, descriptive, cross-sectional and retrospective study was conducted. The AEPS results for 186 infants (372 ears) with a history of prematurity were examined.

[Implementation of intraoperative neurophysiologic monitoring in children and adults in secondary and tertiary health care facilities].

Introduction: Intraoperative neurophysiological monitoring (IONM) is a procedure that uses neurophysiological techniques in order to evaluate the motor and sensitive systems during surgeries that endanger the nervous system.

Method: The approach, scope, target population, and clinical questions to be answered were defined. A systematic search of the evidence was conducted step by step; during the first stage, clinical practice guidelines were collected, during the second stage systematic reviews were obtained, and during the third stage, clinical trials and observational studies were procured.

[The record of sensitive nerve action potentials. Interelectrode distance in healthy children].

Background: Studies in adults show that with a 3 or 4 cm distance between active and reference electrodes, maximum amplitude and latency values of sensitive nerve action potentials are obtained. The purpose of this study was to identify, in healthy children, the interelectrode distances at which the amplitude and peak latency do not differ significantly from those obtained with the intereletrode distance at which the maximum values are obtained.

Methods: Four reference electrodes were placed at 1, 2, 3 and 4 cm distance from the active electrode.