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Biomedical subjects

M J Meyer

Publications and source records attributed to M J Meyer.

11 recordsLinked to original sources
PubMed1992

Patients' duties.

This paper argues that patients' duties are derivable from the idea which typically grounds the idea of patients' rights: patient autonomy. The autonomous patient, joined in partnership with the health care professional, has self-regarding obligations and obligations to others, including health care professionals. Patients' duties include, but are not limited to: a duty to be honest about why the patient seeks care; a duty to collect information on available treatments and likely side-effects; a duty for a patient who has an infectious condition to act on that information which can best prevent further transmission.

Codes of Ethics↗
PubMed1992

Morphology of the mineralizing front and observations of reparative dentine following induction and inhibition of dentinogenesis in the rat incisor.

An extra oral approach was made to 26 pairs of Wistar rat incisors and a small bur used to expose the pulps which were then dressed with either calcium hydroxide paste (Pulpdent) zinc oxide-eugenol cement (Kalzinol) or a triamocinolone acetonide/tetracycline containing cement (Ledermix). Animals were sacrificed at 7 days, incisors removed, a window cut to the pulp opposite the site of exposure, soft tissues removed with 7% NaOCl for 30 minutes before teeth were dehydrated in graded concentrations of acetone and gold coated for examination under SEM. Calcium hydroxide produced rapid complete repair with a remarkably regular formation of calcospherites, except for a zone of relative inhibition perforated by nutrient canals at the periphery of each lesion. Both zinc oxide-eugenol and triamcinolone acetonide cements inhibited both bridging of the defect created by the exposure and dentine formation in the surrounding pulpal wall. Data was grouped according to the degree of hard tissue repair. The results were statistically significant (Chi-square p < or = 0.001). This method demonstrated qualitative and quantitative differences in the repair process resulting from chemical variations in the dressings applied.

Animals↗
PubMed1992

Symmetry in building block design for learning disabled and nonlearning disabled boys.

This study examined perceptual differences in symmetry with and without a model between 21 learning disabled boys with reading deficits and 28 learning disabled boys with deficits in mathematics. 55 nonlearning disabled boys served as controls. All boys were in Grades 3, 4, or 5. Without a model, all learning disabled boys built significantly more asymmetrical building block designs than nonlearning disabled boys. However, with a model, all learning disabled boys could imitate the model, but it took them longer to complete the task successfully. All boys appeared to have difficulty in modeling asymmetrical tasks, taking more time for task completion after seeing an asymmetrical model. This study suggests modeling perceptual tasks might be an effective teaching strategy for such children.

Attention↗
PubMed1987

Self-regulation of stimulation for ADD-H children during reading and vigilance task performance.

The present study examines the hypothesis that motor responses added into rote tasks would modulate the sensation-seeking activity and impulsive errors of hyperactive (ADD-H) children. To this purpose 22 ADD-H and 25 comparison children were administered two repetitive tasks (word decoding and an auditory vigilance task) under both an active response and a passive response condition. Findings were that the impulsive errors, talking/noisemaking, and activity of ADD-H children was normalized (i.e., did not differ from comparison children) only in the high stimulation active response conditions. Behavioral improvements for ADD-H children were documented in both tasks in the active condition, but performance gains were found only in the vigilance task. The findings supported predictions derived from the optimal stimulation theory that the excessive activity and attraction to novel stimuli of ADD-H children can be channeled into appropriate instrumental motor and attention responses.

Arousal↗
PubMed1984

[Gyrate atrophy of the choroid and retina in children. Apropos of 2 cases].

The authors report two familial cases of algerian children with a hyperornithinaemia and a gyrate atrophy. Blood ornithine was 10 to 20 above the normal, lysine and glutamic acid were slightly decreased. Urinary ornithine levels were very high. The enzymatic activity of the ornithine keto-acid transaminase was not detectable in the patients skin fibroblasts. It was more than half the normal value in the children's mother. Owing to a better knowledge of the biochemical abnormalities a poor protein, poor arginine and more recently proline added diet has been recommended in order to alter the development of ocular lesions. Unfortunately the authors did not have the opportunity of following the children long enough to assess the result of this treatment.

Algeria↗