NURSING > QUESTIONS & ANSWERS > NURS 8022 Chapter 15: Alterations in Cognitive Systems, Cerebral Hemodynamics, and Motor Function (All)

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NURS 8022 Chapter 15: Alterations in Cognitive Systems, Cerebral Hemodynamics, and Motor Function

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1. A neurologist explains that arousal is mediated by the: a. cerebral cortex. b. medulla oblongata. c. reticular activating system. d. cingulate gyrus. ANS: C Arousal is mediated by the reticular activating system, which regulates aspects of attention and information processing and maintains consciousness. The cerebral cortex affects movement. The medulla oblongata controls things such as hiccups and vomiting. The cingulate gyrus plays other roles in response. REF: p. 359 2. A 20-year-old experiences a severe closed head injury as a result of a motor vehicle accident. Which of the following structures is most likely keeping the patient in a vegetative state (VS) 1 month after the accident? a. Cerebral cortex b. Brainstem c. Spinal cord d. Cerebellum ANS: B When a person loses cerebral function, the reticular activating system and brainstem can maintain a crude waking state known as a VS. Cognitive cerebral functions, however, cannot occur without a functioning reticular activating system. A VS is not associated with the cerebral cortex, spinal cord, or cerebellum. REF: p. 364 3. A 16-year-old’s level of arousal was altered after taking a recreational drug. Physical exam revealed a negative Babinski sign, equal and reactive pupils, and roving eye movements. Which of the following diagnoses will the nurse most likely see on the chart? a. Psychogenic arousal alteration b. Metabolically induced coma c. Structurally induced coma d. Structural arousal alteration ANS: B Persons with metabolically induced coma generally retain ocular reflexes even when other signs of brainstem damage are present. Psychogenic arousal activation demonstrates a general psychiatric disorder. Structurally induced coma is manifested by asymmetric responses. Structural arousal alteration does not have drug use as its etiology.REF: p. 360, Table 15-2 4. The breathing pattern that reflects respirations based primarily on carbon dioxide (CO2) levels in the blood is: a. Cheyne-Stokes. b. ataxic. c. central neurogenic. d. normal. ANS: A Cheyne-Stokes respirations occur as a result of CO2 levels in the blood. Ataxic breathing occurs as a result of dysfunction of the medullary neurons. Central neurogenic patterns occur as a result of uncal herniation. Normal respirations are based on the levels of oxygen (O2) in the blood. REF: p. 361 5. A teenager sustains a severe closed head injury following an all-terrain vehicle (ATV) accident and is in a state of deep sleep that requires vigorous stimulation to elicit eye opening. How should the nurse document this in the chart? a. Confusion b. Coma c. Obtundation d. Stup

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