Biomedical subjects

G Romahn

Publications and source records attributed to G Romahn.

3 recordsLinked to original sources

PubMed1984

Computer analyzed EEG in methylphenidate-responsive hyperactive children.

Computer-based analyses of the EEG-records were performed in 18 hyperkinetic children. Thirteen of these patients displayed a positive response to clinical treatment with methylphenidate. Discriminant analyses of native EEG-records and differences between the spectrums from the EEG with and without medication made it possible to properly classify 73.3 or 80%, respectively, of all patients. Even based on a relatively small sample it is possible to make predictions as to the effectivity of stimulant treatment solely on the basis of EEG-findings.

Attention Deficit Disorder with Hyperactivity↗

PubMed1978

Influence of a low-frequency tone on the sensitivity of primary auditory neurons: two fiber populations.

The influence of biasing low-frequency tone on the sensitivity of primary auditory nerve fibers to tone bursts at the characteristic frequency is determined. In 7% of the investigated fibers the sensitivity varied systematically with the position of the tone burst within the low-frequency tone period. In the remaining 93% of fibers this dependence was not observed. A comparison of the ratio of these numbers with the ratio of fibers from inner and outer hair cells leads to the suggestion that different responses stem from fibers innervating different types of hair cells.

Acoustic Stimulation↗

PubMed1977

Filter function of the guinea pig cochlea after degeneration of outer hair cells.

After kanamycin induced degeneration of outer hair cells from guinea pigs the tuning properties of primary auditory nerve fibres are compared with those of normal untreated guinea pigs. The existence of fibres with no alteration of the tuning properties leads to the conclusion that there is no neural interaction between inner and outer hair cells needed to enhance the frequency selectivity.

Animals↗