Ein Beitrag zur Frage des Hörvermögens bei Verschluß des runden Fensters

Controlled round-window stimulation in human temporal bones yielding reproducible and functionally relevant stapedial responses

“…It is known since those times that isolated presentation of a sound signal to the RW is almost equally effective for hearing as that presented to the stapes footplate (Wever et al, 1948). On the other hand, the frequent finding that electrocochleographic measures cannot be completely cancelled by adjusting relative phase and intensity of the sound pressures presented independently to both windows (Gisselson and Richter, 2011;Tonndorf and Tabor, 1962) can be used to estimate the upper limit of the contribution of a common mode of intracochlear pressure waves relative to the physiologically dominating differential mode (Voss et al, 1996). The common-mode contribution to hearing is closely related to the hypothesis of equal-volume displacements of both windows as well as to the compressibility of the cochlear fluids.…”

Sealing of the Round Window Reversibly Affects Auditory Brainstem Response Latencies

“…The effect of seal ing the RW on inner-ear structure and func tion remains to be investigated. In a review of altogether 25 publications, Gisselson and Richter [5] reported that 12 authors had found that closure of the RW caused im paired hearing (i.e. the air conduction signals diminished), 9 reported an improvement, and 4 found no change.…”