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Biomedical subjects

Z Dickerman

Publications and source records attributed to Z Dickerman.

58 records · Page 4Linked to original sources
PubMedDate not supplied

Cyclic esotropia with minimal brain dysfunction.

An eight year old with a long history of hyperkinesis and learning difficulties compatible with the diagnosis of minimal brain dysfunction developed alternate day squint known as Cyclic Esotropia. No other abnormal cyclic phenomena such as alterations in sleep structure, diurnal variations in hemoglobin, hematocrit, electrolytes, body temperature, blood pressure or pulse rate was found. In view of the fact that cyclic esotropia may represent an impairment of the "biological clock" thought to be located in the hypothalamus, detailed studies of the hypothalamic hypophyseal axis were performed and found to be normal. It is suggested that if such a biological clock is present, its location is remote from the neural circuits involved in hypothalamic-hypophyseal hormonal release.

Attention Deficit Disorder with Hyperactivity↗
PubMedDate not supplied

Andrological parameters in human semen of high (greater than or equal to 6 ml) and low (less than or equal to 1 ml) volume.

A study was carried out to evaluate 792 semen of high (greater than or equal to 6 ml) and low (less than or equal to 1 ml) volume and sperm counts ranging from 0.1 to 200 x 10(6) per ml. Particularly emphasized were: motility percentage and grade, percentage viability, morphologically normal sperm and immature cells, and the concentration of fructose in semen (mg/ml). The Duncan multiple range test and the Kruskal-Wallis test with multiple comparison of ranks were used in the statistical analyses. The results show that abnormal semen volume influence neither the basic tendency of andrological parameters to change in accordance with sperm counts of semen nor to correlate with each other. The quality of motility was significantly higher in specimens of high semen volume as compared to those of low semen volume. The concentration of fructose in semen was generally higher in specimens of high volumes than in those of low volumes, including semen devoid of sperm. It was assumed that in general increased semen volume does not affect the quality of other andrological parameters, thus being probably unrelated with fertility potential. The considerably lower values of both motility and viability characterizing the semen of low volume would suggest a lower fertility potential of specimens affected by this type of abnormality.

Fertility↗
PubMedDate not supplied

The evaluation of routine andrological parameters in human serum.

A study was carried out to evaluate the andrological parameters in 540 human semen specimens divided into groups according to sperm counts. The parameters were: motility percentage and grade, percentage of viability and of morphologically normal sperm and immature cells. The Duncan multiple range test and the Kruskal-Wallis test with multiple comparison of ranks were used in the statistical analyses. Of particular interest, among other our findings, were the significant differences obtained by comparing the group with sperm counts up to 5 x 10(6) per ml semen and that with counts ranging from 5.1 to 10 x 10(6) per ml semen. This was true for all parameters with the exception of semen volume. Comparison of the oligozoospermic groups (up to 20 x 10(6)/ml) with those having higher sperm counts also showed significant differences. There was a trend towards improvement of the examined parameters with the increase in sperm density, but with a remarkable heterogeneity particularly within the oligozoospermic groups. In all groups motility, viability and morphological normality of sperm showed a positive correlation with each other. "Normal values" of the parameters studied could be derived from scatterplot charts over the entire range of sperm counts and from the statistical evaluation of the grouped material.

Humans↗