NCLEX Neuro Review Questions And Answers With Rationale

NCLEX Neuro Review Questions And Answers With Rationale Which statement is true for a patient who has pathology in Wernicke's area of the cerebrum? A. Receptive speech is affected. B. The parietal lobe is involved. C. Sight processing is abnormal. D. An abnormal Romberg test is present. A The temporal, not parietal, lobe contains the Wernicke area, which is responsible for receptive speech and integration of somatic, visual, and auditory data. Sight processing occurs in the occipital lobe. The Romberg test is used to assess the position sense of the lower extremities. After a major head trauma, the patient's respiratory and cardiac functions are affected. Which area of the brain is damaged? A. Temporal lobe of the cerebrum B. Brainstem C. Cerebellum D. Spinal nerves B The brainstem includes the midbrain, pons, and medulla. The vital centers concerned with respiratory, vasomotor, and cardiac function are located in the medulla. Integration of somatic, visual, and auditory data occurs in the temporal lobe. The cerebellum coordinates voluntary movement, trunk stability, and equilibrium. Motor and spinal nerves serve particular areas of the body. What is the purpose of the blood-brain barrier? A. To protect the brain by cushioning B. To inhibit damage from external trauma C. To keep harmful agents away from brain tissue D. To provide the blood supply to brain tissue C The blood-brain barrier is a physiologic barrier between capillaries and brain tissue. The structure of the brain's capillaries is different from others, and substances that are harmful are not allowed to enter brain tissue. Lipid-soluble compounds enter the brain easily, but water-soluble and ionized drugs enter slowly. The spinal fluid and meninges help cushion the brain. The skull protects from external trauma. Blood is supplied to the brain from the internal carotid arteries and the vertebral arteries. In a patient with a disease that affects the myelin sheath of nerves, such as multiple sclerosis, which glial cells are affected? D Types of glial cells include oligodendrocytes, astrocytes, ependymal cells, and microglia, and each has specific functions. Oligodendrocytes are specialized cells that produce the myelin sheath of nerve fibers, and they are primarily found in the white matter of the central nervous system. Drugs or diseases that impair the function of the extrapyramidal system may cause loss of A. sensations of pain and temperature. B. regulation of the autonomic nervous system. C. integration of somatic and special sensory inputs. D. automatic movements associated with skeletal muscle activity. D A group of descending motor tracts carries impulses from the extrapyramidal system, which includes all motor systems (except the pyramidal system) concerned with voluntary movement. It includes descending pathways originating in the brainstem, basal ganglia, and cerebellum. The motor output exits the spinal cord through the ventral roots of the spinal nerves An obstruction of the anterior cerebral arteries affects A. visual imaging. B. balance and coordination. C. judgment, insight, and reasoning. D. visual and auditory integration for language comprehension. C The anterior cerebral artery feeds the medial and anterior portions of the frontal lobes. The anterior portion of the frontal lobe controls higher-order processes such as judgment and reasoning. Paralysis of lateral gaze indicates a lesion of cranial nerve A. II. B. III. C. IV. D. VI. D Cranial nerves III (oculomotor), IV (trochlear), and VI (abducens) are responsible for eye movement. The lateral rectus eye muscle is innervated by cranial nerve VI and is the primary muscle that is responsible for lateral eye movement Results of stimulation of the parasympathetic nervous system are (select all that apply) A. constriction of the bronchi. B. dilation of skin blood vessels. C. increased secretion of insulin. D. increased blood glucose levels. E. relaxation of the urinary sphincters A, B, C, D Parasympathetic nervous system stimulation results in constriction of the bronchi, dilation of blood vessels to the skin, increased secretion of insulin, and relaxation of the urinary sphincter. Sympathetic nervous system stimulation results in increased blood glucose levels. Why is it difficult to compare the assessment of muscle strength of older adults with that of younger adults? A. Stroke is more common in older adults. B. Nutritional status is better in young adults.