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Biomedical subjects

C N Rhodine

Publications and source records attributed to C N Rhodine.

6 recordsLinked to original sources
PubMed1980

Prosthetic communication device.

A code-generating and display system is described which permits an individual who has lost vocal voluntary motor ability to communicate. The subject sustained severe brain damage in an automobile accident which left him without the power of speech or any significant motor ability, although he is not by definition quadriplegic. He lacks reliable control of eye blink, and the oral movements associated with sucking and blowing are severely impaired; thus, the usual foundations upon which prosthetic devices for quadriplegic patients are designed were not applicable in this case. The subject is confined to a bed, wheelchair, or an exercise table. The system described here has provided the subject with a simple and reliable means of communicating with his family and it permits him to communicate with persons who do not know the Morse code.

Adult↗
PubMed1976

Renal dialysis membrane leak detector.

A leak developing in the membrane separating the blood from the dialysate in an artificial kidney machine requires immediate corrective action. The earliest possible action is desirable in order to minimize patient blood loss. This makes system sensitivity to hemoglobin concentration an important design criteria for blood leak detectors. The leak detector described in this paper matches the spectral properties of hemoglobin to those of the detector in order to achieve a maximum sensitivity while minimizing false alarms. The paper describes the instrumentation and circuitry as well as test results of simulated and clinical trials of the detection system.

Humans↗
PubMed1975

An analysis of the time course of gustatory neural adaptation in the rat.

Neural responses were recorded from the rat chorda tympani nerve following stimulation of the tongue with several concentrations of NaCl. These responses were integrated using a fast time constant (47 ms), and the time course of the decline in neural discharge from the peak of the transient response was computer analyzed. The time course of the adaptation process was described by a constant term and two exponentially decaying components, which most likely reflect the existence of two separate mechanisms contributing to the adaptation process in taste. The constant term and the amplitude of the second gradual exponential decay were correlated with NaCl concentration, whereas the amplitude of the initial rapidly declining exponential component was independent of stimulus intensity. The initial transient response of the chorda tympani nerve may be a function of the rate of stimulus adsorption, whereas the gradual second decline in the neural response may reflect an adaptive mechanism of the taste receptor cell.

Adaptation, Physiological↗