Intrahemispheric Visual-Motor Information Processing and Cerebral Functional Lateralization

1979 ◽  
Vol 48 (2) ◽  
pp. 579-585 ◽  
Author(s):  
Paul L. Wang
Keyword(s):  
Information Processing ◽  
Left Hemisphere ◽  
Right Hemisphere ◽  
Visual Stimuli ◽  
Verbal Material ◽  
Functional Asymmetry ◽  
Functional Lateralization ◽  
Motor Information ◽  
Visual Motor ◽  
The Right

A series of stimuli, words and faces, were presented tachistoscopically to 24 dextrals and 12 sinistrals. The stimuli were presented to one eye at a time and the subjects were instructed to respond to specific words or stimuli with a specific hand. The results indicate that (1) cerebral functional asymmetry is related to handedness; in the dextrals, the left hemisphere is more specialized in verbal recognition, while in the sinistrals, the right hemisphere is more specialized in recognizing non-verbal material. (2) An ipsilateral hand-and-eye combination is a valid method of measuring intrahemispheric information processing, provided that the tachistoscopically presented visual stimuli are capable of inciting specialized hemispheric function. The dominant relationship among the crossed and non-crossed visual pathways is discussed.

Relations between White Matter Maturation and Reaction Time in Childhood

2013 ◽  
Vol 20 (1) ◽  
pp. 99-112 ◽  
Author(s):  
Nadia Scantlebury ◽  
Todd Cunningham ◽  
Colleen Dockstader ◽  
Suzanne Laughlin ◽  
William Gaetz ◽  
...  
Keyword(s):  
Information Processing ◽  
Reaction Time ◽  
White Matter ◽  
Left Hemisphere ◽  
Processing Speed ◽  
Right Hemisphere ◽  
Optic Radiation ◽  
Information Processing Speed ◽  
White Matter Maturation ◽  
The Right

AbstractWhite matter matures with age and is important for the efficient transmission of neuronal signals. Consequently, white matter growth may underlie the development of cognitive processes important for learning, including the speed of information processing. To dissect the relationship between white matter structure and information processing speed, we administered a reaction time task (finger abduction in response to visual cue) to 27 typically developing, right-handed children aged 4 to 13. Magnetoencephalography and Diffusion Tensor Imaging were used to delineate white matter connections implicated in visual-motor information processing. Fractional anisotropy (FA) and radial diffusivity (RD) of the optic radiation in the left hemisphere, and FA and mean diffusivity (MD) of the optic radiation in the right hemisphere changed significantly with age. MD and RD decreased with age in the right inferior fronto-occipital fasciculus, and bilaterally in the cortico-spinal tracts. No age-related changes were evident in the inferior longitudinal fasciculus. FA of the cortico-spinal tract in the left hemisphere and MD of the inferior fronto-occipital fasciculus of the right hemisphere contributed uniquely beyond the effect of age in accounting for reaction time performance of the right hand. Our findings support the role of white matter maturation in the development of information processing speed. (JINS, 2013, 19, 1–14)

Effect of Short Lateralized Signals on Arousal versus Activation on Tasks Requiring Visuospatial or Elementary Semantic Stimulus Processing

1988 ◽  
Vol 67 (3) ◽  
pp. 783-788 ◽  
Author(s):  
Bert De Brabander
Keyword(s):  
Information Processing ◽  
Left Hemisphere ◽  
Right Hemisphere ◽  
Self Regulation ◽  
Indirect Evidence ◽  
Supplementary Information ◽  
Processing Load ◽  
Basic Hypothesis ◽  
The Right ◽  
The Brain

The results of the experiment offer indirect evidence for the basic hypothesis that the brain self-regulates its own arousal and activation as a function of the intensity and type of ongoing cortical activity. When subjects perform a task which can be assumed to be primarily attended to by the right hemisphere, the result of a supplementary information-processing load seems to be increased arousal. On a task primarily attended to by the left hemisphere, the consequence is increased activation. The evidence is indirect because no measurements have been made of the neurological events and processes which are assumed to intervene in this self-regulation process. Although indirect, the evidence may help to formulate more precise psychological hypotheses about the factors controlling the putative effort system which, according to Pribram and McGuinness in 1975, coordinates the arousal and activation of cerebral processes.

scholarly journals Metabolic Lateralization in the Hypothalamus of Male Rats Related to Reproductive and Satiety States

2020 ◽  
Vol 27 (5) ◽  
pp. 1197-1205 ◽  
Author(s):  
David S. Kiss ◽  
Istvan Toth ◽  
Gergely Jocsak ◽  
Tibor Bartha ◽  
Laszlo V. Frenyo ◽  
...  
Keyword(s):  
Food Intake ◽  
Right Hemisphere ◽  
Ex Vivo ◽  
Functional Asymmetry ◽  
Male Rats ◽  
Reproductive Control ◽  
State Dependent ◽  
Functional Lateralization ◽  
Left And Right ◽  
The Right

AbstractThe hypothalamus is the main regulatory center of many homeostatic processes, such as reproduction, food intake, and sleep-wake behavior. Recent findings show that there is a strongly interdependent side-linked localization of hypothalamic functions between the left and right hemispheres. The goal of the present study was to trace functional asymmetry of the hypothalamus related to the regulation of food intake and reproduction, in male rodents. Subjects were examined through measurements of mitochondrial metabolism ex vivo. Impact of gonadectomy and scheduled feeding was tested on the modulation of hypothalamic metabolic asymmetry. Results show that in male rats, functional lateralization of the hypothalamus can be attributed to the satiety state rather than to reproductive control. Fasting caused left-sided metabolic dominance, while satiety was linked to the right hemisphere; trends and direction in sided dominance gradually followed the changes in satiety state. Our findings revealed satiety state-dependent metabolic differences between the two hypothalamic hemispheres. It is therefore concluded that, at least in male rats, the hypothalamic hemispheres control the satiety state-related functions in an asymmetric manner.

scholarly journals Does Functional Lateralization in Birds Have any Implications for Their Welfare?

Symmetry ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1043 ◽  
Author(s):  
Rogers ◽  
Kaplan
Keyword(s):  
Left Hemisphere ◽  
Right Hemisphere ◽  
Light Exposure ◽  
Good Deal ◽  
Avian Embryo ◽  
Brain Lateralization ◽  
In Captivity ◽  
Functional Lateralization ◽  
The Right ◽  
Positive Effect

We know a good deal about brain lateralization in birds and a good deal about animal welfare, but relatively little about whether there is a noteworthy relationship between avian welfare and brain lateralization. In birds, the left hemisphere is specialised to categorise stimuli and to discriminate preferred categories from distracting stimuli (e.g., food from an array of inedible objects), whereas the right hemisphere responds to small differences between stimuli, controls social behaviour, detects predators and controls attack, fear and escape responses. In this paper, we concentrate on visual lateralization and the effect of light exposure of the avian embryo on the development of lateralization, and we consider its role in the welfare of birds after hatching. Findings suggest that light-exposure during incubation has a general positive effect on post-hatching behaviour, likely because it facilitates control of behaviour by the left hemisphere, which can suppress fear and other distress behaviour controlled by the right hemisphere. In this context, particular attention needs to be paid to the influence of corticosterone, a stress hormone, on lateralization. Welfare of animals in captivity, as is well known, has two cornerstones: enrichment and reduction of stress. What is less well-known is the link between the influence of experience on brain lateralization and its consequent positive or negative outcomes on behaviour. We conclude that the welfare of birds may be diminished by failure to expose the developing embryos to light but we also recognise that more research on the association between lateralization and welfare is needed.

scholarly journals Why Are the Right and Left Hemisphere Conceptual Representations Different?

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Guido Gainotti
Keyword(s):  
Left Hemisphere ◽  
Conceptual Knowledge ◽  
Right Hemisphere ◽  
Semantic Knowledge ◽  
Temporal Lobes ◽  
Conceptual Representations ◽  
Motor Information ◽  
Advanced Stages ◽  
The Right ◽  
Joint Disruption

The present survey develops a previous position paper, in which I suggested that the multimodal semantic impairment observed in advanced stages of semantic dementia is due to the joint disruption of pictorial and verbal representations, subtended by the right and left anterior temporal lobes, rather than to the loss of a unitary, amodal semantic system. The main goals of the present review are (a) to survey a larger set of data, in order to confirm the differences in conceptual representations at the level of the right and left hemispheres, (b) to examine if language-mediated information plays a greater role in left hemisphere semantic knowledge than sensory-motor information in right hemisphere conceptual knowledge, and (c) to discuss the models that could explain both the differences in conceptual representations at the hemispheric level and the prevalence of the left hemisphere language-mediated semantic knowledge over the right hemisphere perceptually based conceptual representations.

scholarly journals Technical readiness of young basketball players with different profile of functional asymmetry

2019 ◽  
Vol 23 (3) ◽  
pp. 132-137
Author(s):  
L.S. Frolova ◽  
Yu.O. Petrenko ◽  
A.A. Tymofeev ◽  
P.M. Gunko ◽  
O.V. Okhrimenko ◽  
...  
Keyword(s):  
Left Hemisphere ◽  
Right Hemisphere ◽  
Body Movement ◽  
Functional Asymmetry ◽  
Dominant Hand ◽  
Cerebral Asymmetry ◽  
Basketball Players ◽  
Hemisphere Dominance ◽  
The Right ◽  
Technical Readiness

Purpose The functional asymmetry is considered to be the basis of psycho physiological individual features of young basketball players. It indicates the dominant hemisphere while processing information concerning the precision in body movement in basketball playing technique. The research concerning the cerebral hemispheres asymmetry influence on the movement technique formation of young basketball players is still highly inconsistent. Therefore, the study aims at the determining technical readiness peculiarities of basketball players aged 12-13 with different cerebral asymmetry profiles while performing exercises with dominant and sub-dominant hands. Material 35 basketball players aged 12-13 have been tested in order to determine the type of cerebral asymmetry and technical readiness. To determine the cerebral asymmetry, the computer modified test of Stroop was used. In order to define technical readiness, three exercises which are performed using the right and left hand have been developed. Results Half of the group of basketball players aged 12-13 do not have a clear lateralization of the hemispheres: 51% of participants have symmetry of the hemispheres, 28% - the functional activity of the right hemisphere, and 20% - the left hemisphere activity. The study showed that shots of basketball players with the left cerebral lateralization are more accurate when performed with dominant hand. They prevail in the speed and accuracy parameters of passing and dribbling with both hands as well. Conclusions The many-sided nature of the interhemispheric asymmetry of basketball players aged 12-13 was determined. Its influence on technical readiness was found out. The highest level of technical readiness has been found among basketball players with the left hemisphere dominance. The lowest level of technical readiness was recorded among basketball players with the right hemisphere dominance. It was specified, that at the age of 12-13, the bimanual character of movements of young basketball players with left hemisphere dominance is being formed more actively.

Differential Visual Field-Interhemispheric Transfer: Can it Explain Sex and Handedness Differences in Lateralization?

1987 ◽  
Vol 65 (2) ◽  
pp. 423-429 ◽  
Author(s):  
Richard H. Haude ◽  
Mary Morrow-Tlucak ◽  
Diane M. Fox ◽  
Kevin B. Pickard
Keyword(s):  
Visual Field ◽  
Left Hemisphere ◽  
Left Visual Field ◽  
Spatial Information ◽  
Right Hemisphere ◽  
Right Visual Field ◽  
Localization Task ◽  
Left Handed ◽  
Functional Lateralization ◽  
The Right

104 men and women were tested for visual field-hemispheric transfer of spatial information on a dot-localization task. Right-handed subjects showed significant improvement when stimuli were presented to the left visual field of the right hemisphere (LVF-RH) after practice on the same task presented to the right visual field of the left hemisphere (RVF-LH) first. No improvement was found when the task was presented in the reverse order (LVF-RH first followed by RVF-LH). It was concluded that, for right-handers, transfer of spatial information to the right hemisphere is facilitated while transfer to the left hemisphere is inhibited. Left-handed subjects demonstrated no significant improvement in either condition, suggesting inhibition or lack of transfer of spatial information in either direction. No sex differences were found in either right-handed or left-handed subjects. The findings suggest that there may be different mechanisms underlying the similarities in functional lateralization of women and left-handers.

An Examination of Relationship between Subliminal Perception, Visual Information Processing, Levels of Processing, and Hemispheric Asymmetries

1979 ◽  
Vol 49 (2) ◽  
pp. 451-455 ◽  
Author(s):  
David K. Charman
Keyword(s):  
Information Processing ◽  
Left Hemisphere ◽  
Visual Information ◽  
Right Hemisphere ◽  
Visual Information Processing ◽  
Levels Of Processing ◽  
Hemispheric Processing ◽  
Verbal Recognition ◽  
Triggering Mechanisms ◽  
The Right

A sublimiinal letter was exposed to the left or right hemisphere for either 15 or 30 msec. Subjective guesses were more accurate for visuo-spatial positional recognition made to presentations in the right hemisphere whereas verbal recognition was more accurate to presentations in the left hemisphere. The 30-msec. exposure increased the accuracy of the guesses. These findings were discussed in terms of differential triggering mechanisms for levels of hemispheric processing.

Investigation of the Effect of Mode and Tempo on Emotional Responses to Music Using EEG Power Asymmetry

2013 ◽  
Vol 27 (3) ◽  
pp. 142-148 ◽  
Author(s):  
Konstantinos Trochidis ◽  
Emmanuel Bigand
Keyword(s):  
Left Hemisphere ◽  
Right Hemisphere ◽  
Emotional Responses ◽  
Interactive Effects ◽  
Eeg Activity ◽  
Musical Excerpt ◽  
Major Mode ◽  
Musical Modes ◽  
Slow Tempo ◽  
The Right

The combined interactions of mode and tempo on emotional responses to music were investigated using both self-reports and electroencephalogram (EEG) activity. A musical excerpt was performed in three different modes and tempi. Participants rated the emotional content of the resulting nine stimuli and their EEG activity was recorded. Musical modes influence the valence of emotion with major mode being evaluated happier and more serene, than minor and locrian modes. In EEG frontal activity, major mode was associated with an increased alpha activation in the left hemisphere compared to minor and locrian modes, which, in turn, induced increased activation in the right hemisphere. The tempo modulates the arousal value of emotion with faster tempi associated with stronger feeling of happiness and anger and this effect is associated in EEG with an increase of frontal activation in the left hemisphere. By contrast, slow tempo induced decreased frontal activation in the left hemisphere. Some interactive effects were found between mode and tempo: An increase of tempo modulated the emotion differently depending on the mode of the piece.

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