The Human Brain Essay

1161 words - 5 pages

The Human BrainHow exactly does your brain work? What affects the function of the brain? What could happen if your brain is injured? These questions are only a few of the questions and concerns that people have about the human brain. Lucky for you, I have done some research. These questions, including many others will be answered and you will hopefully get a better understanding of the brain, and why it functions the way it does.First, let's begin with what a brain actually is. A brain is the portion of the vertebrate central nervous system that is enclosed within the cranium, continuous with the spinal cord, and composed of what is known as gray matter and white matter. It is the primary center for the regulation and control of bodily activities, receiving and interpreting sensory impulses, and transmitting information to the muscles and body organs. It allows humans to think, dream, speak, and plan. Not a single person can live without a brain. It is the most amazing and essential organ in the human body.The brain is divided into 3 major parts: the hindbrain (or cerebellum), the midbrain (or brain stem), and the forebrain, also known as the cerebral cortex. ("Parts of your Brain.") Each part controls different body functions. The cerebellum controls balance, coordination, and many skilled motor activities. The brain stem controls breathing, alertness, heart rate, and most basic body functions. The cerebral cortex is the most essential part of the brain. It consists of four different parts called lobes. The occipital lobe controls vision while the temporal lobe controls memory, hearing, and organization. The parietal lobe is in charge of recognition of size, shape, and color, sense of touch, and also spatial and vision perception. The frontal lobe has the biggest role in the brain. It controls functions such as problem solving, personality, emotions, attention, and speaking. ("Parts of the Brain.")Continuing with more about the cerebral cortex, it also consists of two hemispheres: the dominant hemisphere (usually the left side), and the non-dominate hemisphere (usually the right side). Most people just refer to them as the right and left hemispheres. These hemispheres are different from each other in many ways but have certain jobs they must both perform. The right hemisphere is larger and heavier than the left hemisphere and it is the hemisphere that controls facial recognition, sense of direction, geometry, and music. The left hemisphere has more gray matter and controls areas such as speech, intricate voluntary movements, writing, arithmetic, and sequential analysis. To sum it up, the right hemisphere deals more with vision recognition, while the left hemisphere uses the information from the right hemisphere to analyze things. What is interesting about these hemispheres is that they control opposites sides of the body. The left hemisphere controls the right side of the body, and the right hemisphere controls the left side of the body. ("Brain...

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