Archives of oto-rhino-laryngology
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In order to test the possible presence of nystagmus during episodes of sea sickness, we performed electronystagmography (ENG) on nine subjects before and during sailing on a 35-ton vessel in a somewhat heavy sea. In addition, the accelerations of the x, y and z axes of the ship were also monitored and simultaneously recorded. ⋯ The nystagmus was episodic, direction-fixed and its intensity was greater in sea-sick than in non-sick subjects. Our findings suggest that the nystagmus recorded is labyrinthine in origin and stems from temporary peripheral vestibular dysfunction elicited by sea sickness.
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Carcinoma of the tonsil is the second most common neoplasm of the upper respiratory tract and a sore throat is the most frequent initial symptom. Trismus, which may be an accompanying sign, is only rarely the only presenting symptom. A case is presented.
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Arch Otorhinolaryngol · Jan 1979
Effects of deep hypothermia and circulatory arrest on the auditory brain stem responses.
The effects of hypothermia on auditory brain stem response (ABR) in both children with congenital heart disease undergoing cardiac surgery and cats as an animal model were investigated. The latency of the ABR waves were prolonged with decreased body temperature. ⋯ The data from both humans and cats were comparable. The ABR seems to be a useful monitor for evaluating brain stem function during deep hypothermia.
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Arch Otorhinolaryngol · Jan 1979
Electrocochleography and experimentally induced loudness recruitment.
The relationship between changes in loudness and the cochlear whole-nerve potential following experimentally produced deafness was studied in an animal model. Reaction time of a subject's response to an auditory stimulus has been shown to be an index of loudness in human experiments and has been adapted to nonhuman primates. In a series of experiments, four macaque monkeys were operantly conditioned to respond to 8-kHz tones over a range of 3--80 dB SPL, and their reaction times to pure tone stimuli were measured. ⋯ Recruitment was observed in both the behavioral and the electrical measures. Histological studies of these damaged cochleas revealed primarily outer hair cell destruction, with a relative sparing of inner hair cells and nerve supply. The findings of this study are interpreted as strong support for the clinical electrocochleogram as an objective indicator of the presence of loudness recruitment.