[The influence on sound damages by an extract of ginkgo biloba (author's transl)].

A fraction of Ginkgo biloba, used in experiments with animals ensured significantly the diminution of sound damages caused by white noise or by a pure tone of 4.5 kHz. Higher amplitudes of the acoustic nerve potentials show the protective effect of this fraction of Ginkgo biloba at acute sound damages. It is moreover possible to hold physiologically the adaptation of excitation of the hair cells of the organ of Corti by the fraction of Ginkgo biloba before and after sound damage caused by white noise or during a pure tone of 4.5 kHz. The influence of the fraction of Ginkgo biloba can be seen by a significantly slower recovery of the noise damaged evoked potentials of the acoustic cortex. An efferent protective influence on the neurons of the acoustic cortex is discussed. The fraction of Ginkgo biloba in this form of solution has not been tested for clinical use but it seems to be rich in meaning.