Jorrit Bleeker

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In a previous paper attention was drawn to the possibility of introducing the labyrinth as an organ for sound perception. Behavioural responses of the guinea pig as well as electrophysiological results in the pigeon indicated that fenestration of the labyrinth might be an alternative to cochlear implants. In this paper gross electrode electrophysiological(More)
Single unit recordings were made from the nerve branch innervating the crista in the horizontal semicircular canal of a pigeon. The vestibular organ was either stimulated with sound through the ear canal or with a vibrator in contact with the membraneous ampulla roof. Units responding to sound or vibration showed tuning with a best frequency of(More)
Cochlea-deprived pigeons were placed on a rotating platform and stimulated with sound after fenestration of the lateral canal. The whole nerve action potentials evoked by the sound stimulus were suppressed by the rotatory stimulus. The time course of this suppression makes the lateral crista the most acceptable site of generation of the action potential. In(More)
A serological study using the complement fixation reaction for herpes zoster virus (HZV) and herpes simplex virus (HSV) was carried out on 120 patients with Bell's palsy and 5 with Ramsay-Hunt syndrome. Three Bell's palsy patients (2.5%) showed a significant HZV antibody titre rise. In no case was a rise of HSV antibody titre observed. Two Ramsay-Hunt(More)
Darstellung einer Methode zur Untersuchung des Einflusses von Anoxie und ototoxischen Substanzen auf das vestibuläre System. Nach Fensterung des lateralen Bogenganges bei der Taube konnte das Aktionspotential des N. vestibularis während akustischer Reizung registriert werden bei gleichzeitiger Ableitung des Aktionspotentials des N. cochlearis. Der Einfluß(More)
A report is presented of experiments on guinea pigs and pigeons concerning behavioural and electrophysiological responses of the labyrinth to sound. In the guinea pigs the cochlea was destroyed on both sides by CO2 laser radiation and fenestration of the lateral semicircular canal was done. In the pigeons the cochlea was removed before fenestration. On(More)
A survey is given of the literature on the sensitivity of the vestibular system to audio-frequency sound and vibration in animals. It is also shown that responses to such stimuli can be evoked in man. On the basis of these results it was decided to perform a fenestration of the horizontal semicircular canal in three profoundly deaf volunteers, with normal(More)
Hearing thresholds were measured for 5 normal pigeons with the heart-rate conditioning method. After extirpation of the membranous cochlea on both sides and fenestration of the lateral canals, hearing thresholds were measured again with the same method at 250, 750 and 1500 Hz. Hearing thresholds found in this way for deaf fenestrated pigeons correspond very(More)