Hemispheric Differences
Hemispheric Differences - Related Videos
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.
07:30
Just-noticeable Differences
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2023
Source: Laboratory of Jonathan Flombaum—Johns Hopkins University Psychophysics is a branch of psychology and neuroscience that tries to explain how physical quantities are translated into neural firing and mental representations of magnitude. One set of questions in this area pertains to just-noticeable differences (JND): How much does something need to change in order for the change to be perceivable? To pump intuitions about this, consider the fact that small children grow at an enormous...
01:05
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...
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.
03:00
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 supports communication between the cerebral hemispheres, so specialization does not mean that each side operates independently. Its connections allow information relevant to language, attention, perception, memory, and motor control to be integrated across sides. Studying this interhemispheric exchange helps explain how lateralized processing contributes to unified cognition and coordinated behavior.
A population-level bias indicates a tendency observed across groups, not an absolute rule for every individual. Hemispheric differences therefore need to be interpreted as patterns of lateralization that may coexist with bilateral cooperation. This distinction prevents researchers from treating specialized processing as complete separation and encourages conclusions tied to measured behavior, connectivity, or brain activity.
Structural evidence focuses on brain organization, including patterns of neural connectivity, whereas functional evidence addresses how processing is associated with activity during cognition or behavior. Considering both forms of evidence gives a fuller account than either alone: researchers can relate anatomical organization to lateralization in language, attention, perception, memory, and motor control.
Neuroscience studies combine behavioral tasks, neuroimaging, electrophysiology, and evidence from brain injury. Behavioral measures show how performance changes across tasks, while imaging and electrophysiology examine brain organization or activity; injury studies add information about consequences when particular regions are damaged. Using complementary approaches helps connect observed behavior with hemispheric organization rather than relying on one measure.
Brain-injury studies can show how damage to a specific region changes language, attention, perception, memory, or motor control, linking disrupted function with hemispheric organization. When researchers examine recovery after such damage, they can also investigate how outcomes relate to remaining brain organization and communication between the hemispheres.
They provide a framework for examining how brain organization relates to cognition across development and how neurological disorders may affect specialized processing or interhemispheric cooperation. The same perspective is relevant to recovery after damage, because it connects clinical outcomes with the organization of language, attention, perception, memory, and motor control.