The Central Nervous System

1120 Words 5 Pages
The human body is extremely complex and made up of various systems and organs that must work together. When one part does not function the way it is suppose to, it can slow down the functions of the other parts, which can be detrimental . A quote by Doris Lessing states that when one’s body malfunctions or contains chemical imbalances, “It makes you aware of the knife-edge we live on”. In order for the human body to function correctly, the central nervous system, endocrine, and peripheral nervous system must all work together properly. The central nervous system is made up of the brain and spinal cord. It’s responsibility is to integrate sensory information and respond appropriately. The separate function for the brain is to coordinate body …show more content…
Nerve cells and neurons are the base segments of the nervous system, they send and receive impulses, with the help of dopamine, a compound present in the body as a neurotransmitter. When dealing with parkinson's disease, dopamine producing nerve cells begin to die off. Basal ganglia is responsible for ensuring smooth movement, but when dopamine is not stimulated adequately, basal ganglia are affected, which causes imbalances, slowness and stiffness. Overall, this shuts down motion and rigidity, or tremor of the body, similar to patients in Awakenings such as Leonard, when he was unable to control his hand, feel or write. Something as small as dopamine producing nerve cells not fulfilling their responsibility, or becoming damaged, can overall affect the entire body to where it may not function precisely. One small mistake, and the body becomes damaged. This is similar to the quote by Lessing mentioned before, that we live on a knife-edge, and when one small fault or lapse occurs, it can throw us over the edge. When the nervous system is damaged “Most neurons in the central nervous system cannot repair or renew themselves, unlike other cells in the body. So, if some die through illness or damage, the nervous system …show more content…
The peripheral nervous system contains nerves that lay beyond the spinal cord and brain. It sends signals to the brain so it can process them. Also, it’s responsibility is to connect the central nervous system to organs, limbs and skin to allow sensation, movement, motor coordination and behaviors. Without the peripheral nervous system, the CNS would not function. It takes in sensory information from the external environment, and sends messages through neurotransmitters. The brain returns a message back through the peripheral nervous system and the PNS listens. Without the PNS, the brain would not be able to take in or send out any information or messages to control the body. “Your peripheral nervous system manages the unconscious and automatic actions of the body, as well as the thoughts and actions that are under your conscious control” (How the brain). Perhaps the patients in the movie Awakenings peripheral nervous system was not sending the information gathered from the environment, and that is why they could not function correctly. Their brain didn’t have any information to tell the body to move. Without the PNS, the brain has no way of communicating with the rest of the human body. Overall, the PNS is essential for the CNS and brain to fulfill its duties and allow the body to function

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