Comparison between the frequency specificities of auditory brainstem response thresholds to clicks with and without high-pass masking noise.

In this study, the frequency specificity of the auditory brainstem response (ABR) threshold to a click masked with 1590-Hz high-pass masking noise is compared with the frequency specificity of the unmasked click-evoked ABR threshold. The ABR threshold to the high-pass-noise-masked click stimulus is low frequency specific and corresponds with the 1,000-Hz pure-tone threshold. Although the ABR threshold to the unmasked click stimulus corresponds with the '3,000'-Hz pure-tone threshold, the frequency specificity seems much less pronounced than that of the low-frequency-specific stimulus.

Conductive hearing loss assessment in children with otitis media with effusion. A comparison of pure tone and BERA results.

A comparison between pure-tone audiometry and brainstem electric response audiometry was made in 25 children with a conductive hearing loss due to otitis media with effusion. Pure-tone audiometry, including bone and air-conduction thresholds, was recorded using standard procedures. BERA was used to construct a latency-intensity function and from this the conductive hearing loss could be estimated.

Brainstem electric response audiometry: estimation of the amount of conductive hearing loss with and without use of the response threshold.

Three aspects of brainstem response audiometry were investigated in the present study. (1) The brainstem response threshold was compared with the pure-tone audiogram in 40 patients with conductive hearing loss. The brainstem response threshold has a one-to-one relationship with the mean of the pure-tone thresholds at 2 and 4 kHz.

Low-dosage treatment in de novo patients with Parkinson's disease: a prospective study.

In 68 younger de novo patients with the hypokinetic-rigid type of PD the action of bromocriptine, Sinemet, a combination of these drugs, and orphenadrine with additional bromocriptine or Sinemet medication was investigated over at least a 6-year period. The favorable reaction on Sinemet medication was complicated by the occurrence of dyskinesias in the majority of cases as contrasted with the bromocriptine group. Dyskinesias were mild and not prominent in the combined group.

The relation between the pure-tone audiogram and the click auditory brainstem response threshold in cochlear hearing loss.

Auditory brainstem response thresholds for 209 ears with cochlear hearing loss were compared with the pure-tone thresholds. It is shown that the pure-tone threshold in the 2- to 4-kHz region has a one-to-one relationship with the auditory brainstem response threshold. Estimating the pure-tone threshold from the auditory brainstem response threshold, the standard error of the estimate is 11 dB.

[25 years of electroencephalography in cerebrovascular disease].

The value of the EEG has not been diminished by the advent of new diagnostic procedures and the improvement of older techniques. For electro-encephalography is in essence a 'clinical' method, reflecting in its own particular way, the variable status of the brain. Moreover, in conjunction with these methods the EEG can provide for better information concerning the brain's condition.