The Brain Essay

1022 WordsMay 20, 20135 Pages
The Brain Enid Fox Axia College The Brain The brain is the part of the central nervous system that is located in the skull and is comprised of major divisions and structures. According to Pinel (2009), "the five swellings that compose the developing brain at birth are the telencephalon, the diencephalon, the mesencephalon, the metenchalon, and the myelencephalon. These swellings ultimately develop into the five divisions of the adult brain" (p. 64). Along with the five major divisions of the brain there are five major structures. The telencephalon and diencephalon are also known as the forebrain, the mesencephalon, the midbrain, and the metencephalon and myelencephalon, the hindbrain. The purpose of this paper is fivefold: I will describe the five major structures of the myelencephalon, the metencephalon, the mesencephalon, the diencephalon, the telencephalon along with an explanation each structure's function in the human body. The hindbrain is made of the cerebellum, pons and medulla and is divided into two parts, the upper, called the metencephalon, and a lower, the myelencephalon. The myelencephalon , also referred to as the medulla is the most posterior part of the brain and is situated between the pons and spinal cord. One part of the myelencephalon is the reticular formation. According to Siegel (1979a)," This is a group of neurons that has extensive connections to many different areas of the brain. They extend from the medulla to the forebrain and are found throughout the brainstem wherever specific neural tracts or nuclei do not exist". The various functions of the reticular formation include sleep, attention, movement, the maintenance of muscle tone and, cardiac, circulatory and respiratory reflexes. The pons and cerebellum together constitute the metencephalon and is also a part of the reticular formation. According to an

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