TOC - Passage 2

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The word anesthesia—means WITHOUT FEELING. This describes accurately the effect of ether in the anesthetic dosage. Although there no pain felt during operations when anesthesia is inhaled, the *nerve impulses excited by a surgical operation still reaches the brain. Not every portion of the brain is fully anesthetized, since surgical anesthesia does not kill and this allows the nerve impulses to reach the brain. This gives rise to the question : What will be the effect of trauma upon the part of the that remains awake? If in surgical anesthesia, the traumatic impulses cause an excitation of the wide-awake cells, how are the remainder of the cells of the brain, despite anesthesia, affected? Also, are they prevented by the anesthesia from expressing that influence of nerve stimulus in conscious perception or in muscular action.
Whether the ANESTHETIZED cells are influenced or not must be determined by noting the physiologic functions of the body after anesthesia has worn off. This can be done in animals by an examination of the brain-cells. The effect of Anesthesia on the vasomotor, the cardiac, and the respiratory centers discharging energy in response to traumatic stimuli applied to various sensitive regions of the body during surgical anesthesia have long been known. If the trauma is more, exhaustion of the entire brain will be observed after the effect of the anesthesia has worn off. In spite of the complete paralysis of voluntary motion and the loss of consciousness due to ether, the traumatic impulses that are known to reach the AWAKE centers in the medulla also reach and influence every other part of the brain.
The functional depression which is a consequence of the morphologic alterations seen in the brain-cells may be due to the low blood-pressure which follows excessive trauma is shown by the experiments. The circulation of animals was first rendered STATIC by over-transfusion, and was controlled by a continuous blood-pressure record on a drum. In each of the instances, morphologic changes in the cells of all parts of the brain were found, but it required much more trauma to produce brain-cell changes in animals whose blood-pressure was kept at the normal level than in the animals whose blood-pressure was allowed to take a downward course. In the cortex and in the cerebellum, the changes in the brain-cells were in every instance more marked than in the medulla.

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Related Keywords

Word Lists:

Anesthesia : insensitivity to pain, especially as artificially induced by the administration of gases or the injection of drugs before surgical operations

Traumatic : emotionally disturbing or distressing

Trauma : a deeply distressing or disturbing experience

Dosage : the size or frequency of a dose of a medicine or drug

Cerebellum : the part of the brain at the back of the skull in vertebrates. Its function is to coordinate and regulate muscular activity.

Surgical : relating to or used in surgery

Cardiac : relating to the heart

Anesthetic : a substance that induces insensitivity to pain.

Respiratory : relating to or affecting respiration or the organs of respiration

Functional : of or having a special activity, purpose, or task; relating to the way in which something works or operates

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Additional Information:

Words: 403

Unique Words : 184

Sentences : 16

Reading Time : 1:47

Noun : 123

Conjunction : 19

Adverb : 18

Interjection : 0

Adjective : 34

Pronoun : 4

Verb : 60

Preposition : 68

Letter Count : 1,979

Sentiment : Positive

Tone : Formal

Difficult Words : 102

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