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At least 19 recordsLinked to original sources
PubMed1977

A validity study of the Neural Efficiency Analyzer in relation to selected measures of intelligence.

This study attempted to determine the validity of the Ertl Neural Efficiency Analyzer as a measure of intellectual ability by using NEA-Alpha and Neural Efficiency scores to predict collage grade point average (GPA) both alone and in combination with paper-and-pencil measures of intelligence for 22 male and 64 female college students. Results indicate that NEA-Alpha scores can predict GPA with moderate sucess and also that NEA-Alpha scores account for variability in grade point average not associated with paper-and-pencil tests.

Adult↗
PubMed1976

Neural efficiency analyzer scores of reading disabled, normally reading and academically superior children.

Usefulness, under field-testing conditions, of one version of a Neural Efficiency Analygated. The equipment was said to measure efficiency of information processing as reflected in time between alternate EEG falling zero-crossing points. Special emphasis was placed on the difference score, a measure of right-left hemisphere "efficiency" differences. Contrary to earlier reports, no significant differences were found between such scores of groups of reading disabled, normally reading, and academically superior children. Possible reasons for the negative findings are explored.

Achievement↗
PubMedDate not supplied

Long-term changes in the activity of superior colliculus neurons isolated from corticofugal influences.

In acute experiments on nonnarcotized, immobilized cats, spike activity was studied in superior collicular neurons which were isolated from direct, descending cortical influences. Animals were taken for experimentation at various periods (from 3 to 20 months) after the operation which disconnected the cortical connections which projected from one hemisphere. An increase was noted in the regular forms of activity, and there was a decrease in the frequency of group discharges. Evoked activity of the cells was suppressed during the early periods after disconnection of corticocollicular connections. Later (after 9--12 months) its gradual restoration was observed. More than 70% of the neurons again began to respond to adequate stimuli. The sensitivity to moving photic stimuli was restored in only 17% of the neurons studied.

Animals↗
PubMed1976

[Transcallosal modulation of a focus of maximal activity in the motor cortex].

In cats, EPs from 170 symmetrical points of the motor cortex were recorded during bilateral and unilateral stimulation of nerves of hind--and forelimbs. Charts of localization of the maximal activity foce (MAF) were drawn. Transection of the corpus callosum was shown to be followed by narrowing of MAFs during bilateral stimulation and by their enlargement during unilateral stimulation. The effect of MAF enlargement was found to be due to summation of thalamocortical and transcallosal projections in animals with intact callosal system, while the MAF narrowing effect--to be determined by reciprocal transcallosal influences. Existence of the spatial transcallosal modulation of thalamocortical projection in the motor cortex is supposed.

Animals↗
PubMedDate not supplied

[Electrical activity of the caudate body during the orienting reaction in dogs].

It has been shown that during an orienting reaction a delta-rhythm sets in in the dog EEG of the caudate nucleus head, which coincides with facilitation of the recruited rhythm in the auditory cortex EEG and inhibition of the motor activity. It has been assumed that the caudate nucleus head is involved in the processes of limitation of non-selective movements during orienting reactions.

Animals↗
PubMedDate not supplied

[The role of the medial geniculate bodies in analyzing sounds].

Elaboration and manifestation of motor alimentary conditioned reflexes were studied after a lesion of medial geniculate bodies (MGB) in adult cats. No substantial disturbance were recorded of the capacity for pitch analysis. In the case of more extensive MGB lesions, there were some difficulties in the elaboration of tone differentiations but not in their achievement. Additional temporo-parietal cortical ablation drastically reduced the animals' capacity for anlysing sound frequencies and more profoundly disturbed their capacity for inhibitory reactions.

Animals↗
PubMedDate not supplied

[Properties of nuclear and dispersed elements of the cortical end of the auditory analyzer according to total evoked potentials to sound].

In chronic experiments on cats short-latency evoked potentials (EPs) to clicks were recorded simultaneously in three cortical areas--auditory (nuclear elements of the cortical end of the auditory analyser) sensorimotor and visual ones (scattered auditory elements). EPs to above threshold clicks in the auditory area differed from EPs of non-auditory areas by a greater amplitude and relatively stable configuration. The EP threshold in the auditory area was lower and the increase in its amplitude throughout a rise in clicks' intensity far greater than in the non-auditory areas. The above difference in responses of nuclear elements in the primary auditory cortex and of scattered elements in non-auditory areas are considered as the sign of specificity of their functional organization, i. e. as the manifestation of the participation of auditory nuclear elements in a relatively delicate analysis of auditory stimuli and that of scattered ones--in a more simple and limited analysis.

Animals↗
PubMedDate not supplied

[Cortico-subcortical interrelationships in the visual analyzer system at various stages of ontogenesis].

The influence of a corticofugal volley produced by single electrical stimulation of the visual projection cortical zone on the neuronal activity of LGB was studied in non-anaesthetized rabbits aged from three to thirty-five days. A coincidence was found between the time of appearance of nonspecific inhibitory corticofugal influences on the spontaneous activity of LGB neurons and the emergence of the first phasic-specific responses of the neurones of this level to a visual stimulus. It has been shown that the sensory flow at the LGB level can be controlled by non-specific inhibitory corticofugal influences at early periods of postnatal development. The appearance from the 15th day of life of specific responses to a corticofugal volley, including activation phases, leads to a greater complexity of the regulating Cortical influences on conduction of the afferent signal at the thalamic level. The data obtained are considered from the standpoint of integration of various levels of the visual analyser at different stages of ontogenesis.

Animals↗