Comparing statistics for objective detection of transient and steady-state evoked responses in newborns.

Objective: Receiver operating characteristic (ROC) methodology was used to compare the performance of different statistics in the automatic detection of multiple auditory steady-state responses (MSSR) and click auditory brainstem responses (cABR).

Study Sample: Thirty-five healthy newborns tested within the first two weeks of birth.

Design: In each case cABR and MSSR (0.

Screening of neurodevelopmental delays in four communities of Mexico and Cuba.

Objective: Nursing personnel applied a computerized evaluation instrument, Neuropediatric Development (NPED), and compared the prevalence of deviations from normal neurodevelopment in four communities of two Latin American countries, Mexico and Cuba. At the same time the feasibility of introducing this tool into Mexican local health centers was assessed.

Design And Sample: The NPED screening tool was applied to 400 children 1-60 months old from two suburban and one urban communities of Mexico and one urban community of Cuba.

[Electrophysiological characterisation of envelope-following responses].

Introduction: The auditory ability to discriminate rapid changes in the envelope of language sounds is essential for speech comprehension. This ability is deteriorated in some neurological diseases such as multiple sclerosis, auditory neuropathy, sensorineural hearing loss, presbycusis and primary developmental language disorder. Envelope-following responses (EFRs) in humans are useful in objective measurement of temporal processing in the auditory nervous system.

[Newborn hearing screening test with multiple auditory steady-state responses].

Introduction: The techniques most frequently used within a screening context (otoacoustic emissions and click auditory brainstem response) have well-known limitations in hearing loss detection.

Objective: This study examines the feasibility of a semi-automated multiple auditory steady-state responses (MSSR) system designed for neonatal hearing screening.

Methods: A sample of 50 newborns without risk factors (well-babies) was tested within two weeks of birth.

Test accuracy and prognostic validity of multiple auditory steady state responses for targeted hearing screening.

The test accuracy and prognostic validity of Multiple Auditory Steady State Responses (MSSR) and click Auditory Brainstem Responses (cABR) was compared within the context of a targeted screening protocol. A sample of 508 high-risk babies was first screened using cABR and MSSR (500 and 2000 Hz). All children (failed/ pass) were called back at three to four years of age to determine their hearing status (pure-tone audiometry).

Estimating audiometric thresholds using auditory steady-state responses.

Human auditory steady-state responses (ASSRs) were recorded using stimulus rates of 78-95 Hz in normal young subjects, in elderly subjects with relatively normal hearing, and in elderly subjects with sensorineural hearing impairment. Amplitude-intensity functions calculated relative to actual sensory thresholds (sensation level or SL) showed that amplitudes increased as stimulus intensity increased. In the hearing-impaired subjects this increase was more rapid at intensities just above threshold ("electrophysiological recruitment") than at higher intensities where the increase was similar to that seen in normal subjects.