By contrast, the
left hemisphere selects individual parts of the real world for focused attention, separating them from their context in order to do so.
They first optogenetically stimulated a 'source' area in the right hemisphere with a beam of light and then observed a
left hemisphere 'target' area with OISI.
This extension of the processing time allows for integration, as the rational
left hemisphere is activated and begins to form a logical narrative.
In birds and other animals studied, there is a highly significant separation of attention, with the
left hemisphere being used largely for paying narrow-beam, sharply focused attention to the world for the purpose of manipulation and the right hemisphere for paying open, sustained, vigilant attention to the world, in order to understand and relate to the bigger picture.
This was because language perceived via the right ear is processed in the
left hemisphere.
In particular, it was found to be associated with hypoperfusion involving the
left hemisphere, frontal lobe, and thalamus.
The researchers found that teens who received PEERS showed a significant decrease in right hemisphere activity, and an increase in
left hemisphere activity.
Winstein and Pohl (1995) reported that individuals with
left hemisphere stroke showed deficits in open-loop, motor planning aspects of movement, whereas individuals with right hemisphere stroke showed deficits in closed-loop, feedback-based aspects of movement [14].
For instance, a person is stressed if the
left hemisphere of the brain, which rules logic and language, is agitated while the right hemisphere, which controls intuition and holistic thought, is suppressed.
When researchers applied TMS at a frequency that depressed activity in one memory region in the
left hemisphere, communication increased with the same region in the right hemisphere, suggesting the right hemisphere was compensating to help with the task.
Odor 2 also produced
left hemisphere dominant asymmetry.
Movement of the right hand is controlled by the
left hemisphere of the brain, and in over 90 percent of the population, the speech processing center is in the
left hemisphere of the brain.
Critique: As informed and informative as it is thoughtful and thought-provoking, "How Whole Brain Thinking Can Save the Future: Why
Left Hemisphere Dominance Has Brought Humanity to the Brink of Disaster and How We Can Think Our Way to Peace and Healing" is exceptionally well organized and presented making it a very highly recommended addition to both community and academic library Psychology/Neuroscience collections and supplemental studies reading lists.
However, unilateral representation was also evidenced in
left hemisphere in amygdala, mesial premotor cortex, and dorsal brainstem, with the increased regional cerebral blood flow in the region of right hemisphere anterior insula and orbitofrontal and temporopolar cortices [3].
