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Biomedical subjects

F B SIMMONS

Publications and source records attributed to F B SIMMONS.

At least 19 recordsLinked to original sources
PubMed1965

AUDITORY NERVE: ELECTRICAL STIMULATION IN MAN.

Auditory perceptions produced in a person deaf to acoustic stimulation were studied by electrically exciting the auditory nerve through permanently implanted electrodes. Pulsed current as small as 1 microampere peak-to-peak could be perceived. Pitch, as reported by the subject, varied with electrode selection, current amplitude, and pulse repetition rate from about 70 to at least 300 pulses per second. Loudness increased with amplitude and duration of pulse stimuli, and to a lesser extent with repetition rate. The total range in amplitude of the stimulus, from threshold to an uncomfortable loudness, was 15 to 20 decibels. Simultaneous stimulation in separate electrodes produced a number of complex effects.

Acoustic Stimulation↗
PubMed1964

CLINICAL USEFULNESS OF ELECTRONYSTAGMOGRAPHY.

An electrical method for measuring and recording eye motion (electronystagmography) allows greater accuracy and sensitivity than methods previously used. As herein applied to studies of labyrinthine function, measurement of eye speed during caloric-induced nystagmus, as an indicator of pathological spontaneous or positional nystagmus not otherwise observable, or observation of eye motion with the lids closed, demonstrates that the technique is valuable as a clinical tool.

Ear, Inner↗
PubMed1962

A theory of middle ear muscle function at moderate sound levels.

The minor amplitude modulations of auditory input, which are introduced by the middle ear muscle acoustic reflex at moderate and low sound intensities in the cat, may contribute significantly to signal analysis or attention mechanisms of the auditory system.

Animals↗