To obtain one total experience, the brain integrates the different operations carried out by the right and left cerebral hemispheres. (Restak, Richard, MD. Mozart’s Brain and the Fighter Pilot. p 71-73.NY: Harmony Books, 2001.)

Right-brained or left-brained thinking (so called) is actually a fluctuation on a continuum between two extremes: Left linear, analytical sequential thinking; versus Right holistic, global, and simultaneous thinking. (Healy, Jane M., PhD. Endangered Minds. p 124-126. NY: Simon & Schuster, 1990.)

Cross-over exercises: Movement activities provide opportunities to cross the body’s mid-line. Doing so requires left and right hemispheres to communicate across the corpus callosum. This hemispheric integration is essential to the ability to read and write. (Pica, Rae. 10 Reasons to Promote Emergent Literacy through Movement & Active Learning.

The two hemispheres are somewhat distinct in structure, neurochemistry, and processing. There is a great deal of laterality. (Siegel, Daniel J., MD. The Developing Mind. p 177-180. NY: The Guilford Press, 1999.)

The hemispheres are interdependent. Brain Scans: Left processes grammar and pronunciation; right processes intonation. (On the Brain, p 2-3. CA:2005.)

There are asymmetries between the hemispheres (e.g., Broca’s area and Wernicke’s areas in the left hemisphere). (Marcus, Gary, PhD. The Birth of the Mind. p 130-131. NY: Basic Books, 2004.)

In most people, the left and right hemispheres tend to dominate in different cognitive functions, just as people engage the world differently with their left and right hands. (Fields, R. Douglas, PhD. The Other Brain. p 4-5. NY: Simon & Schuster, 2009.

The hemispheres remain in balance when encountering images of positive or emotionally neutral scenes. The balance of activity shifts toward the right hemisphere when the image is one of horror, carnage, suffering, death, or injury—and it can become overwhelmed and dysfunctional. Watching images of disaster has a more powerful effect on one’s mental stability than reading about the disaster. (Restak, Richard, MD. The New Brain. p 71-74. PA: Rodale, 2003.)

Typically there is instant communication between hemispheres, although each perceives events and records information independently. This provides an illusion of unity. Déjà vu may result when there is a brief delay in transmission of information. (Bragdon, Allen D., and David Gamon, PhD. Brains that Work a Little Bit Differently. p 52-56. NY Barnes and Noble Books, 2000.)

Many imaging studies may show only small real hemispheric asymmetries in function because the brain has a tendency to show symmetrical increases in activity even though the task is really initiated by one side much more than the other. (Springer, Sally p., and Georg Deutsch. Left Brain, Right Brain. p 72-73. NY: W.H. Freeman and Co., 1997.)

Imagine that you have a gray glove on your left hand and a white one on the right. There are, in fact, slight differences in color between the two cerebral hemispheres. The left side has more gray matter; the right more white (contains more myelination since it houses the essential intuitive, feeling, reactive skills). (Wonder, Jacquelyn, and Priscilla Donovan. Whole Brain Thinking. p 6. NY: Ballantine Books, 1984.)

At any given time there will be more activity in one hemisphere compared to the other. (Jensen, Eric. Brain-Based Learning (Revised). p 21. CA: The Brain Store, 2005.)

Speaking effectively requires a fine balance between the left and right hemispheres. Speakers who hold your attention usually shift from side to side, alternating between precise, logical speech in rapid crisp style, and some personal comment, a joke, or a dramatic experience in an animated expressive style. (Wonder, Jacquelyn, and Priscilla Donovan. Whole Brain Thinking. p 166. NY: Ballantine Books, 1984.)

The two hemispheres really do have quite specific skills that are hard-wired to the extent that, in normal circumstances, certain skills will always develop on a particular side. Almost every mental function you can think of is fully or partly lateralized. (Carter, Rita, Ed. Mapping the Mind. p 35-38. University of California Press, 1998.)

We still do not properly understand why the brain divides tasks in the way we observe in most people. (Greenfield, Susan, Con. Ed. Brain Power, Working out the Human Mind. p 53. The Ivy Press Limited, 1999.)

Hitchcock’s surprising and usually humorous endings rely heavily on leading the viewer through the logical, left-brain facts of the situation and then suddenly revealing the paradoxical, right-brain side of the story. (Wonder, Jacquelyn, and Prescilla Donovan. Whole Brain Thinking. p 106. NY: Ballentine Books, 1984.)

Under acute stress, the two hemispheres of the brain become disconnected. Laughter improves creativity and problem-solving, and activates the limbic system in the brain, connecting the right and left sides. It helps you do more whole brain work. (O’Donnell, Sinara Stull. Laugh More at Work To Ease Office Stress.

Laughter stimulates both sides of the brain to enhance learning. It eases muscle tension and psychological stress, which keeps the brain alert and allows people to retain more information. (Humor and Laughter: Health Benefits and Online Sources.)

Refer to Cerebral Hemispheres (under Brain Function) for additional information.

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