Learn More
Our progress towards the development of a particular form of cochlear implant for the totally deaf is described. A single channel stimulation at the round window or promontory is used. This involves a minimum of surgical intervention and infective risk, preserves the possibility of remission and allows the application of later developments. The signal used(More)
Developmental changes in spherical cell sizes were measured in the ventral cochlear nucleus (VCN) in normal guinea pigs aged 2 days and 2, 7 and 12 weeks to establish the time course of postnatal neuronal growth, as a baseline for our experimental work. A continued growth of spherical cell size was observed in the VCN up to 7 weeks postnatally. Animals were(More)
The present work describes the effects on the spiral organ of very young guinea pigs, of continuous white noise (76 dB SPL, 7 days) combined with gentamicin, using surface preparations and both transmission and scanning electron microscopy to analyse structural changes. Gentamicin only, at 80 mg/kg/day for 5 days did not cause any perceptible loss of hair(More)
The current investigations of choice for a suspected glomus tumour are either direct or indirect angiography to include digital subtraction followed by computerized tomography (CT) or magnetic resonance imaging (MRI) or, if available, CT and MRI with gadolinium alone. Although these modalities confirm the diagnosis and give anatomical information to(More)
A sensation of hearing is provided for the otherwise totally deaf adult by the use of an electrode arrangement, placed external to the cochlea, which provides only larynx frequency speech pattern information. This is normally obtained by acoustic analysis and is presented so that, although its pattern is preserved, its physical form is matched to the(More)
The possible effects of incubator noise on the hearing of premature babies have long been debated. The type of hearing loss found in 12 low-birthweight children was examined; and the variable noise level in regularly used incubators was measured. This noise, applied to guinea pigs continuously during their second week after birth, was shown histologically(More)
Guinea pigs aged one week were exposed to white noise at a maximum of 76 dB SPL for 7 days and were then killed 3, 8 and 16 weeks later for histological examination of the cochlea by the surface preparation method. Appreciable increases in outer hair cell losses were observed in the apical turn 3/3 1/2, chiefly in the outer two rows, between the 3rd and 8th(More)