Hemisphere Lateralization
Hemisphere Lateralization - Related Videos
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Cerebral Hemispheres
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2024
The human brain, a complex organ, is functionally divided into two cerebral hemispheres—left and right. These hemispheres are interconnected by a structure of paramount importance, the corpus callosum. This substantial bundle of neural fibers is not just a bridge between the hemispheres but a crucial element for the brain's comprehensive functioning. It enables efficient communication between the two hemispheres, allowing each side of the brain to control and receive sensory and motor...
07:03
Evaluation of Hemisphere Lateralization with Bilateral Local Field Potential Recording in Secondary Motor Cortex of Mice
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Cited by 6 •
2019
We present in vivo electrophysiological recording of the local field potential (LFP) in bilateral secondary motor cortex (M2) of mice, which can be applied to evaluate hemisphere lateralization. The study revealed altered levels of synchronization between the left and right M2 in APP/PS1 mice compared to WT controls.
05:47
Repetitive Transcranial Magnetic Stimulation to the Unilateral Hemisphere of Rat Brain
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Cited by 10 •
2016
We applied repetitive transcranial magnetic stimulation (rTMS) to the unilateral hemisphere of rat brain, by placing a 25-mm figure-8 coil 1 cm lateral to the vertex on the biauricular line and angulating the coil by 45°. An in-house water cooling system was used for rTMS for more than 20 min.
05:36
Central and Divided Visual Field Presentation of Emotional Images to Measure Hemispheric Differences in Motivated Attention
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2017
This study compared central versus divided visual field presentations of emotional images to assess differences in motivated attention between the two hemispheres. The late positive potential (LPP) was recorded using electroencephalography (EEG) and event-related potentials (ERPs) methodologies to assess motivated attention.
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Recording of Local Field Potential from Both Hemispheres of the Mouse Brain
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2025
This video demonstrates in vivo recording of local field potential (LFP) from bilateral M2 areas of the mouse brain. An anesthetized mouse is secured and prepared for the procedure. To record LFPs, insert microelectrodes into the target coordinates of the bilateral M2 areas, which are responsible for complex motor movements.
FAQs
The corpus callosum prevents left and right hemispheres from functioning as isolated systems by enabling information exchange and integration. This connection allows specialized neural networks to contribute jointly to perception, language, emotion, and behavior. Consequently, lateralization describes a pattern of organization rather than a complete separation of mental functions between the two sides.
Lateralization is flexible because functional specialization does not eliminate interaction between the hemispheres. Partly distinct neural networks can cooperate through information exchange, and the relative contribution of each side may vary across cognitive tasks and individuals. This perspective helps psychologists avoid treating complex abilities as permanently confined to one hemisphere.
Language is often more strongly associated with the left hemisphere, while visuospatial processing is often more associated with the right. These patterns provide useful organizational tendencies, not absolute rules. Their value lies in showing how different cognitive functions can rely more heavily on particular neural networks while still involving communication and integration across both hemispheres.
The relationship is organized but interactive: partly distinct neural networks support different functions, while communication between hemispheres helps combine their contributions. This framework connects neural organization with observable differences in perception, emotion, attention, memory, and behavior. It also explains why psychological functions are better understood as coordinated processes than as isolated products of one brain side.
Research on hemisphere lateralization can address how the brain supports cognition, attention, memory, and consciousness. Examining these domains helps investigators relate hemispheric organization to psychological processes without reducing them to a single side. The approach is therefore relevant to both basic studies of mental function and broader questions about how coordinated brain activity shapes experience and behavior.
Neuropsychological assessment can use knowledge of hemispheric specialization to interpret how brain organization relates to cognitive and behavioral functioning. Patterns involving language, visuospatial processing, attention, or memory may provide context when evaluating individuals with brain injury. Because lateralization is interactive and flexible, interpretation should consider broader network cooperation rather than assuming one damaged side explains every difficulty.
Lateralization informs rehabilitation because injury can disrupt functions associated more strongly with one hemisphere while also affecting communication between neural systems. Understanding specialization alongside interhemispheric integration helps place changes in language, visuospatial processing, cognition, or behavior within a wider brain context. This perspective supports rehabilitation research and clinical reasoning after stroke or other brain injuries.