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Biomedical subjects

R Hermans

Publications and source records attributed to R Hermans.

97 records · Page 6Linked to original sources
PubMed1988

[Double discharges of motor units and tremor strength].

The relationship between the double-discharges (DDs) of single motor units (MUs) and the tremor strength was studied in 7 patients with parkinsonism and 3 with essential tremor. The potentials of single MUs and the force of the first dorsal interosseus muscle were recorded during slight isometric contractions. The rate of DDs and their interval duration were correlated with the global tremor strength and the amplitudes of the single tremor beats. With increasing tremor strength, the rate of DDs increased and the duration of their intervals decreased. It is concluded that DDs act as tremor amplifiers. This effect is probably accounted for by a more than linear summation of two consecutive MU contractions with short interval which is known from animal experiments.

Adult↗
PubMedDate not supplied

Non-traumatic giant aneurysm of a superficial temporal artery.

We present a case of giant aneurysm in the superficial temporal artery. A 59-year-old male was admitted to our hospital with a slowly growing swelling just in front of his right ear. Diagnosis was made by US and CT. CTA was able to provide accurate anatomic information and to eliminate the risks associated with diagnostic conventional angiography. A superselective embolization of the giant temporal aneurysm was performed.

Aneurysm↗
PubMedDate not supplied

Pneumoparotitis.

Explore the source record for details and available documents.

Adult↗
PubMedDate not supplied

Magnetic resonance imaging of the masseter muscle: a preliminary genetic study in monozygotic and dizygotic twins.

Magnetic resonance images of the head were taken in five monozygotic and seven dizygotic twins in order to calculate bilaterally masseter muscle cross-sectional areas and total volume. Comparing correlation coefficients between cotwins, genetic influences could be expected for maximal cross-sectional area but not for volume measurements. Model fitting revealed that additive genetic factors explained 93.9% of the variance for the left and 82.4% for the right maximal masseter muscle cross-sections. It is anticipated that while the number of masseter muscle fibers is under strong genetic control, the length of individual fibers can be influenced by specific environmental factors. In the second part of the investigation, cephalometric measurements from lateral headplates were compared with these masseter muscle values in 10 twin pairs. Only three of the 15 angular and five (three vertical, one transversal, and one sagittal measurement) of the 20 linear measurements were significantly correlated with masseter muscle values.

Face↗