A Comparison of Nervous Systems

A Comparison of Nervous Systems - The Nervous System We...

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The Nervous System We refer to two components of our nervous system: the sensory-somatic , which regulates voluntary and reflex actions, and the autonomic nervous system in which the brain directs involuntary functions such as peristalsis. The brain is the control center of the body. It weighs about 3 pounds and is composed of approximately 100 billion nerve cells. It is 2% of our body weight, but uses 20% of our body’s energy. Cerebrum – largest part of the human brain; 7/8 of total brain; divided into hemispheres that are joined by the Corpus Callosum which is a bridge of 200 million nerve fibers; folded outer layer is known as the cerebral cortex; it is made of many folds or convolutions that increase surface area; it is important in sensory processing and motor response. It is divided into lobes responsible for various areas of processing: The Occipital Lobe is located in the rear or the brain and is essential for processing visual information The Parietal Lobe interprets touch
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