BBB - Brain Plasticity and Hemispheres Lesson

Learning Targets:

  • Understand the process of brain reorganization following injury and discuss the concept of neurogenesis.
  • Explore insights gained from split-brain patients regarding the distinct roles of the left and right hemispheres.

Courtesy of the AP psychology course and exam description, effective fall 2024. (n.d.). Links to an external site.

 

Exploring Brain Plasticity and Neurogenesis

Brain plasticity, or neuroplasticity, refers to the brain's ability to reorganize itself by forming new neural connections throughout life. This remarkable ability allows the brain to adapt and compensate for injuries, such as when a specific brain region is damaged. An example of brain plasticity is seen in individuals who have experienced a stroke. After a stroke, the brain can reorganize its neural pathways to enable functions once controlled by the damaged area to be taken over by other brain parts. Neurogenesis, a related concept, involves the generation of new neurons in the brain, contributing to its plasticity and adaptability. These processes highlight the brain's incredible capacity for change and adaptation, providing hope for rehabilitation and recovery following neurological injuries.

Decorative image displaying the right and left side of the brain.

The Divided Brain

The cerebral cortex is divided into two hemispheres: the left and right. Both are similar in appearance (though not identical) and contain very subtle differences in size and pattern of folds and grooves. The functions for each are in similar places. The hemispheres exhibit contralateral control, meaning the left hemisphere controls the right side of the body, and the right hemisphere controls the left side. Generally, those with a more robust right hemisphere are better at spatial and creative tasks, and those with a stronger left hemisphere are better at logical and sequential tasks.

Watch the video below to learn about the hemispheres of the brain.

 

Complete the activity on the differences between the right and left sides of the brain below. Look at each characteristic and assess whether it is controlled by the Left Hemisphere or the Right Hemisphere and drag the label accordingly.

 

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