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Biomedical subjects

D R Thomson

Publications and source records attributed to D R Thomson.

5 recordsLinked to original sources
PubMed1990

Measurement of auditory brainstem responses evoked by electrical stimulation with a cochlear implant.

Auditory brainstem responses evoked by electrical stimulation with a Nucleus/Cochlear implant can be measured if care is taken to prevent stimulus artefacts. A simple procedure is described which relies upon a passive LCR filter to prevent the radiofrequency carrier from entering the input of the recording amplifier. The filter simply prevents saturation of the amplifier by the carrier.

Brain Stem↗
PubMed1989

Polarity order of biphasic square pulse electric current stimulation of human cochlear nerve: observations with transtympanic electrodes.

Eighteen totally deaf human cochleae were stimulated with biphasic square pulses of current through transtympanic needle electrodes. The thresholds of the 2 polarity orders, + - and - +, were compared for various pulse durations. For a pulse duration of 500 microseconds the polarity order - + had the lower threshold. For pulse durations of 2 ms and longer, the polarity order + - had the lower threshold. A discussion is given of the significance of the results for finding out the site of cochlear nerve excitation by the stimuli.

Cochlear Nerve↗