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Biomedical subjects

K H Plattig

Publications and source records attributed to K H Plattig.

5 recordsLinked to original sources
PubMed1989

[Objective examination of taste in man by measuring gustatory evoked potentials].

Taste is an indispensable sense as well as olfaction to spend a tasteful life. The objective method of examining taste has not yet been established. Previous attempts to get gustatory evoked potentials (GEPs) in men and animals failed by contaminating artifacts. Solving this problem, the following developments were done. 1) Avoiding tactile artifacts, the tongue was rinsed constantly with distilled water. 2) By recording and averaging the galvanic skin response (GSR) at the same time, its influence on GEPs was compensated. 3) For proper averaging by computer, conditions of precise onset, duration of stimulus, the shortest stimulus rise and fall times were fulfilled by magnetic valve system. The new gustometer is expected to be one of the standard objective methods of examining taste in clinical practice.

Adult↗
PubMed1978

[Clinical testing of impulse-gustometry as a new method of gustometry (author's transl)].

For the first time in clinical routine testings impulse-gustometry was used in comparison to normal chemical or electrogustometric methods. Loss of taste caused by tympanoplasty, radiation of tumors in head and neck and accompanying facial nerve palsies was tested. The exactly defined location of the stimulus is known advantage in electrogustometry. Impulse-gustometry, however, is able to stimulate different taste sensations like the chemical methods. The sensible sensation, therefore, is eliminated. The stimulating pulses ranged between 0,5 and 2,0 ms at frequencies of 10 to 300 cps. Like with Krarup's method in impulsegustometry there is not always a taste sensation.

Ear, Middle↗
PubMed1976

Taste qualities elicited by electric stimulation of single human tongue papillae.

Single human taste papillae in 5 young test subjects were electrically stimulated 84 times each with a silver wire (0.4 mm tip diameter) versus a 5 x 3.5 cm2 reference electrode on the left wrist of the subject. The electrical pulses were positive (54 papillae) or negative (45 papillae) of 0.5 msec duration and had a frequency of 50, 100, 200, 400, 600 or 800 Hertz. For control 45 papillae were merely touched by the electrode without current stimulation. Significant gustatory and tactile results (x2-test, P less than or equal to 0.05) signaled by the subjects were: a) on anodic stimulation 50 +/- 5% of the touched papillae gave overall taste responses, namely 22.2% sour, 3.8% bitter and 1.8% salty; the rest were mixed sensations. Sweet was not reported in these final experiments; b) on cathodic stimulation 42.2 +/- 5% of the papillae responded with taste, which again were reported as 22.2% sour, 2.2% salty, the rest mixed; c) on mere touching there were hardly any gustatory sensations reported. - These results indicate only a relative specifity for each single human taste papilla and its taste fibres.

Adolescent↗
PubMed1976

[Decrease of latency of auditory evoked potentials in humans practicing transcendental meditation (author's transl].

Slow cortical auditory responses were recorded from humans practicing transcendental meditation. The potentials were computated according to Fig. 1, and the latencies of the positive peaks P1 and P2 and of the negative peaks N1 and N2 were measured as well as the areas of the on-effect FON, of the off-effect FOFF and of the DC-shift FDC during the stimulus duration. Latencies for most of the initial peaks during TM as well as during normal consciousness were significantly shorter than in a control group in a dozing state or during normal consciousness (Table 1 and Fig. 2). Certain differences were also found in regard to other parameters such as amplitudes and areas of the auditory evoked response.

Acoustic Stimulation↗