PubMed Health⌕ Search

SEARCH · PubMed Health

Results for “Developability”

Explore indexed PubMed citations for clinical trials, systematic reviews and public health research. Read source abstracts and follow each citation to its original PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 1,117 records · Page 62Linked to original sources
PubMed1996

Development of an aspect of executive control: development of the abilities to remember what I said and to "do as I say, not as I do".

Luria's tapping test (tap once when E taps twice, tap twice when E taps once) was administered to 160 children (80 males, 80 females) between 3 1/2 to 7 years old. Older children were faster and more accurate than younger children, with most of the improvement occurring by the age of 6. All children tested demonstrated understanding of the instructions during the pretest, and most started out performing well, but younger subjects could not sustain this. Over the 16 trials, percentage of correct responses decreased, especially among younger subjects. Performance here was compared with performance on the day-night Stroop-like task. The most common error on both tasks was to comply with only one of the two rules. Other errors included tapping many times regardless of what the experimenter did and doing the same thing as the experimenter, rather than the opposite. It is suggested that the tapping task requires both the ability to hold two rules in mind and the ability to inhibit a strong response tendency, that these abilities improve between 3-6 years of age, and that this improvement may reflect important changes within frontal cortex during this period of life.

Aptitude↗
PubMed1994

Effects of prenatal exposure to 50 Hz magnetic fields on development in mice: I. Implantation rate and fetal development.

Pregnant CD1 mice were exposed or sham-exposed from day 0 to day 17 of gestation to a 50 Hz sinusoidal magnetic field at 20 mT (rms). Preimplantation and postimplantation survival were assessed and fetuses examined for the presence of gross external, internal, and skeletal abnormalities. There were no statistically significant field-dependent effects on preimplantation or postimplantation survival, sex ratio, or the incidence of fetuses with internal or skeletal abnormalities. Magnetic field exposure was, however, associated with longer and heavier fetuses at term, with fewer external abnormalities. The results lend no support to suggestions of increased rates of spontaneous abortion or congenital malformation following prenatal exposure to power frequency magnetic fields.

Abnormalities, Radiation-Induced↗
PubMed1983

The development of the spinal motor column in relation to the myotomal muscle fibers in the zebrafish (Brachydanio rerio). I. Posthatching development.

The neuromuscular system in the trunk of larval and adult zebrafishes was studied by means of light and electronmicroscopical methods. Spinal motoneurons were identified with the horseradish peroxidase retrograde transport method. We correlated the differentiation and growth of the myotomal muscle with the number of motoneurons per spinal cord segment and the size of the motoneuron somata. The adult number of motoneurons is reached in an early larval stage, before the muscle fiber type differentiation in the myotomes is completed. The mean motoneuron size does not bear a clear correlation with the size of the myotomal muscle. In adult zebrafishes we could distinguish the motoneurons which innervate the superficial slow red and the deep fast white muscle fibers on the basis of soma size and position in the motor column. The motoneurons of the red muscle part are small; they are located in the ventrolateral part of the motor column. The motoneurons of the deep fast white fibers are large; they lie near the central canal.

Animals↗
PubMed1999

[Haptic form discrimination. Group comparison of children with normal speech development and former speech development disordered patients].

The importance of the neurobiological basis of developmental language disorders includes somatosensory modalities. Twenty-five children were diagnosed as having specific language-impairment at preschool age. All were examined with regard to their manual haptic form discrimination without visual control at a mean age of 8.7 years +/- 7.1 months. This study group was compared to age- and gender-matched normal children of equal non-verbal intelligence (control group). Haptic discrimination was measured with the Seguin formboard on which the children were required to place ten geometrical forms in appropriate holes. Both groups differed significantly in their mean quantitative performances in favor of the control group (P < 0.05). The difference in their mean performance and their mean discrimination times did not reach statistical significance. All results were not age-dependent. The control group on average performed significantly better with their left hands than the study group (P < 0.05). Qualitative analysis revealed a significant difference in haptic discrimination of the pointed forms and was probably caused by inadequate exploration procedures and/or cognitive representation deficits. The results of the children with previous developmental language disorders were interpreted as an expression of an impaired cerebral maturation.

Child↗