NEW BG1114: Knowledge Checkpoint #2_Brain, Limbic, RAS

OVERVIEW

Get ready for Knowledge Checkpoint #2. In this lesson, you will review the parts of the brain, and you will show what you know through readings, discussions, and games. You will need the brain cutouts or something to draw with to make a model of the brain.

Click on the icons to explore the parts of the brain.

The regions of the brain are the cerebrum, cerebellum, and brainstem.

The largest region of the brain in the cerebrum. It is divided into a left hemisphere and a right hemisphere.

The hemispheres are connected by a bundle of nerve fibers called the corpus callosum. The corpus callosum enables the two hemispheres to communicate and integrate activity.

On the next slide, you will see parts of the brain. Can you place the pieces in the correct arrangement?

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The cerebellum regulates voluntary activities relating to balance, posture, coordination, and motor movement.

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The brainstem connects your brain to your spinal cord and controls life functions like heartbeat, breathing, and food digestion.

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Please click on each icon to complete a short activity.

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THE LIMBIC SYSTEM

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THE RETICULAR ACTIVATING SYSTEM

The RAS is a bundle of nerves about two inches long, about the size of your little finger. The RAS regulates behavior, alertness, stimulation, consciousness, and motivation.

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The RAS

• controls our alertness
• helps us to focus on the things we assign importance
• regulates our fight-flight response
• controls how we perceive the world
• serves as a gatekeeper of information

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