Biomedical subjects

G Salomon

Publications and source records attributed to G Salomon.

At least 55 records · Page 3Linked to original sources

PubMed1981

ECochG and psychoacoustic tests compared in identification of hearing loss in young children.

Among 149 children (median age 23 months, range 2-123 months) examined by ECochG, a comparison was made between pure-tone and ECochG thresholds in 53 patients. By using linear regression analysis a high correlation was found (correlation coefficient 0.92, p less than 0.0005) proving that ECochG gives valid estimates of the hearing thresholds, also in small children. A comparison between behavioral observation audiometry (BOA) and ECochG thresholds was performed in 62 children. It was concluded that BOA exhibits poor sensitivity in the assessment of hearing losses and underestimates their degree of severity. Furthermore, when BOA diagnoses normal hearing, there is a 9% risk of depriving a "deaf' child of suitable treatment.

Audiometry↗

PubMed1981

Slow cortical responses and the diagnosis of central hearing loss in infants and young children.

To evaluate the usefulness of slow cortical responses (ERA) for threshold estimation in infants and young children, 83 children were investigated with combinations of pure-tone audiometry, electrocochleography (ECochG) and ERA. The deviations between ECochG/ and ERA thresholds were correlated to brain function in order to diagnose central hearing losses. By comparing corresponding values of 2 kHz pure-tone and ERA thresholds, 32% (10/31) errors were found, mainly below 35 dB HL. In a group of patients with no sign of brain disorder, an overall error rate of 37% (20/53) was found. Below 35 dB HL, 72% (11/15) errors were found. In a group of patients with brain dysfunction, the overall rate was 70% (21/30), below 35 dB HL it was 84% (21/25). In the range below 35 dB HL, no significant difference (p greater than 0.05) in errors was found between the groups with and without brain disorders. It is concluded that ERA is unreliable for the estimation of moderate hearing losses and cannot per se detect a central hearing dysfunction. Elevated ERA thresholds may indicate a central hearing loss, but to establish this topical diagnosis, ECochG and neuropsychological examinations are necessary.

Audiometry↗

PubMed1980

Middle components of the auditory evoked response in bilateral temporal lobe lesions. Report on a patient with auditory agnosia.

An investigation of the middle components of the auditory evoked response (10--50 msec post-stimulus) in a patient with auditory agnosia is reported. Bilateral temporal lobe infarctions were proved by means of brain scintigraphy, CAT scanning, and regional cerebral blood flow measurements. The middle components were found to be normal regarding latency (pa approximately 30 msec) and configuration of the recordings, when evaluated relative to the peripheral hearing loss in the patient and to the corresponding normative template. Based upon the combined procedures, it is concluded that the middle components cannot be generated exclusively, if at all, in the primary auditory cortex, located in the temporal lobe. Furthermore, the responses are found to be of neurogenic origin according to the methodological procedure applied.

Aged↗

PubMed1979