The Brain and Cranial Nerves Essay

1681 WordsApr 26, 20057 Pages
The Brain and Cranial Nerves One of the most complex and fascinating things in the human body is the brain. The body is "capable of almost everything, but it would not be possible, without the brain receiving information, and analyzing the information." The brain is aware of its surroundings, via input from the spinal cord and cranial nerves. Cranial nerves with sensory functions allow us to smell and see. Nerves with both motor and sensory functions are responsible for everything from tasting and chewing, to breathing and the heating of your heart. Many of the little things we take for granted are also made possible by cranial nerves. Solving problems, feeling hungry, laughing. Each of these activities occurs in a different…show more content…
The Medulla contains white matter that is sensory and motor tracts. These tracts extend between the spinal cord and other parts of the brain. The Pons lies directly superior to the Medulla. Like the Medulla, the Pons is a bridge that connects parts of the brain with one another. The midbrain extends fro the Pons to the Diencephalon. The Midbrain contains both tracts and nuclei. The interior art of the midbrain contains a pair of tracts called Cerebral Pedunctis. They contain axons of corticospinal corticopontine and corticobolbar motor neurons. These conduct nerve impulses from the cerebrum to the spinal cord, medulla, and pons. The posterior part of the midbrain is called the tectum. The Tectum contains four rounded elecations, two superior, and two inferior. The two superior elevations are known as the superior culliculi. They serve as reflex centers for certain visual activities. The two inferior elevations, the inferior colliculi, are aprt of the auditory pathway, relaxing impulses from the receptors for hearing in the ear to the thalamus. The Cerebellum is the second largest part of the brain. The cerebellum occupies the inferior and posterior aspects of the cranial cavity. The Diencephalon extends from the brain stem to the cerebrum. It includes the thalamus, hypothalmas, epithalamus, and subthalmus. The twelve cranial nerves are responsible for a variety of things. Some of these nerves bring information from the sense
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