Presbycusis and phonemic regression.

One thousand forty two tonal and speech audiograms are compared to the results of Jerger's speech audiometry (Synthetic Sentence Identification). In older subjects (more than 50 years) with a normal PTA or with a high frequency hearing loss, the speech intelligibility is better in a silent than in a noisy environment where it is a function of the Speech reception threshold. This difference is much smaller in younger individuals.

The effects of ventilation tube placement on hearing, speech, language, cognition and behaviour.

As a part of a larger, multidimensional study on secretory otitis media (SOM) and its relation to children's development, the effects of ventilation tube (VT) placement on hearing, speech, language, cognition and behaviour were studied over a six month period. Children with a clear and persistent picture of SOM were examined just before tubes were inserted and again, with the same measures, six months later. Their evolution was compared to that of a control group.

Age effect in speech audiometry and in brainstem electric response audiometry.

A review of the files of 152 patients with normal hearing or slight hearing loss revealed in the older age group that (1) scores on the synthetic sentence identification task (SSI, S/N = 0 dB) have a tendency to drop in comparison with the discrimination scores for phonetically balanced words in silence (PB), and that (2) the wave V of the auditory brainstem response shows a greater latency prolongation when the stimulation rate is increased. However, no statistical correlation between these two age-linked phenomena emerged, so they seem to be the result of two independent processes.

Ciliogenesis and coordinated ciliary beating in human nasal epithelial cells cultured in vitro.

Human nasal epithelial cells, dissociated from nasal polyps, lost all their cilia when cultured as monolayers on 0.2% collagen gels in Ham's F12-DME 1/1, supplemented with NU-serum 10%, choleratoxin (10 ng/ml), retinoic acid (10(7) M) and antibiotics. These deciliated epithelial cell sheaths were then placed in a suspension culture system, and epithelial aggregates and vesicles formed.

[Clinical study of surgically treated parotid tumors during 1981-1985].

There is a great histologic diversity in parotid tumors. Four categories can be distinguished: pleomorphic adenoma, monomorphic adenomas, low-grade malignant tumors and high-grade malignant tumors. The most current neoplasm is the pleomorphic adenoma.